Accurate species identification is a key component of biodiversity research.DNA barcoding is an effective molecular method used for fish species identification.We aimed to study the DNA barcoding of fish in Zhoushan c...Accurate species identification is a key component of biodiversity research.DNA barcoding is an effective molecular method used for fish species identification.We aimed to study the DNA barcoding of fish in Zhoushan coastal waters,explore the differences and applicability of two gene fragments(12S rRNA and COI)of DNA barcoding in fish species identification,and established a comprehensive fish barcoding reference database.Two hundred and eighty-seven captured fish samples from Zhoushan coastal waters were identified using morphological characteristics and DNA barcoding.A total of 26412S rRNA sequences(belonging to eight orders,31 families,55 genera,and 66 species)and 188 COI sequences(belonging to seven orders,30 families,48 genera,and 58 species)were obtained.The lengths of the 12S rRNA sequences ranged from 165 to 178 bp,and the guanine-cytosine(GC)content was 45.37%.The average 12S rRNA interspecific and intraspecific genetic distances(K2P)were 0.10%and 26.66%,respectively.The length of the COI sequence ranged 574–655 bp,and the content of GC was 45.97%.The average 12S rRNA interspecific and intraspecific genetic distances(K2P)were 0.16%and 27.45%,respectively.The minimum interspecific genetic distances of 12S rRNA and COI(1.23%and 1.86%)were both greater than their maximum intraspecific genetic distances(2.42%and 8.66%).Three molecular analyses(NJ tree,ABGD,and GMYC)were performed to accurately identify and delineate species.Clustering errors occurred when the 12S rRNA sequences were delimited using the NJ tree method,and the delimitation results of ABGD and GMYC are consistent with the final species identification results.Our results demonstrate that DNA barcoding based on 12S rRNA and COI can be used as an effective tool for fish species identification,and 12S rRNA has good application prospects in the environmental DNA(eDNA)metabarcoding of marine fish.展开更多
Acanthogobius ommaturus, which belongs to the family Gobiidae, is a euryhaline and demersal fish that is widely distributed in the coastal areas, harbors, and estuaries of China, D. P. R. Korea and Japan. In this stud...Acanthogobius ommaturus, which belongs to the family Gobiidae, is a euryhaline and demersal fish that is widely distributed in the coastal areas, harbors, and estuaries of China, D. P. R. Korea and Japan. In this study, the genetic diversity and genetic structure of five geographical populations of A. ommaturus was assessed using the mitochondrial hypervariable region gene and microsatellite markers. The results of the two genetic markers indicated that the A. ommaturus populations had a high level of genetic diversity. The mitochondrial marker detected weak genetic differentiation among populations, and the Neighbor-Joining tree showed that there was no obvious pedigree branches and geographic structure as well. However, population of Zhoushan showed significant genetic differentiation with other populations by microsatellite markers. The population of A.ommaturus has not experienced bottleneck effect recently. We speculated that the Pleistocene climate change and juvenile fish dispersal played an important role in the population differentiation of A. ommaturus.展开更多
Pleiotropic drug resistance(PDR) transporters are widely distributed membrane proteins catalyzing the export or import of a diverse array of molecules, and are involved in many plant responses to biotic and abiotic st...Pleiotropic drug resistance(PDR) transporters are widely distributed membrane proteins catalyzing the export or import of a diverse array of molecules, and are involved in many plant responses to biotic and abiotic stresses. However, it is unclear whether PDRs are involved in Nicotiana attenuata resistance to the necrotic fungal pathogen Alternaria alternata. In this study, transcriptional levels of both NaPDR1 and NaPDR1-like were highly induced in N. attenuata leaves after A. alternata inoculation. Interestingly,silencing NaPDR1 or NaPDR1-like individually had little effect on N. attenuata resistance to A. alternata;however, when both genes were co-silenced plants became highly susceptible to the fungus, which was associated with elevated JA and ethylene responses. Neither NaPDR1 nor NaPDR1-like was significantly elicited by exogenous treatment with methyl jasmonate(MeJA), whereas both were highly induced by ethylene. The elicitation levels of both genes by A. alternata were significantly reduced in plants with impaired JA or ethylene signaling pathways. Thus, we conclude that both NaPDR1 and NaPDR1-like function redundantly to confer resistance against A. alternata in N. attenuata, and the elicitation of the transcripts of both genes by the fungus is partially dependent on ethylene and jasmonate signaling.展开更多
Although patatin was initially identified as a major storage protein in potato tubers, patatin-like proteins(PLPs) have been recently reported to be widely present in many plant species and shown to be involved in pla...Although patatin was initially identified as a major storage protein in potato tubers, patatin-like proteins(PLPs) have been recently reported to be widely present in many plant species and shown to be involved in plant-pathogen interactions. However, it is not clear whether PLPs are involved in Nicotiana attenuata resistance against the necrotrophic fungal pathogen, Alternaria alternata. In this study we identified a NaPLP gene, whose expression was highly elicited by A. alternata inoculation. Silencing NaPLP enhanced N. attenuata resistance to A. alternata, which was associated with higher induction levels of JA and ethylene biosynthetic genes, NaACS1, NaACO1 and NaLOX3. The induction of NaPLP expression by the fungus was abolished in JA-deficient plants and significantly reduced in ethylene-insensitive plants. In addition, NaPLP transcripts were highly induced by exogenous treatment with either methyl jasmonate(MeJA) or ethephon. Co-treatment with MeJA and ethephon led to a much higher induction level of NaPLP transcripts, and this synergistic induction was largely dependent on endogenous JA and ethylene signaling pathways. Thus, we conclude that the NaPLP gene is elicited by A. alternata via JA and ethylene signaling pathways in a synergistic way; however, unlike other JA-and ethylene-induced defense genes,NaPLP negatively affects plant resistance to the fungus likely by suppressing JA and ethylene biosynthetic gene expression.展开更多
NAC-LIKE,ACTIVATED BY AP3/PI(NAP)is a NAC transcription factor regulating leaf senescence in Arabidopsis thaliana.In wild tobacco Nicotiana attenuata,a nuclear localized NAC transcription factor NaNAC29 was identified...NAC-LIKE,ACTIVATED BY AP3/PI(NAP)is a NAC transcription factor regulating leaf senescence in Arabidopsis thaliana.In wild tobacco Nicotiana attenuata,a nuclear localized NAC transcription factor NaNAC29 was identified to be highly elicited after inoculation of Alternaria alternata,a notorious necrotic fungus on tobacco species.The NaNAC29 possesses similar tertiary structure to NAP with 60%amino acid identity.However,it remains unknown the role of NaNAC29 in plant defense responses to A.alternata and leaf senescence in N.attenuata.In this paper,Defensin-like protein 1(NaDLP1)was highly induced in N.attenuata after A.alternata inoculation and bigger lesions were developed in NaDLP1-silenced plants.Interestingly,A.alternata-induced NaDLP1 was reduced by 76%in VIGS NaNAC29 plants and by 61%in JA deficient irAOC plants at 3 days post inoculation.The regulation of NaDLP1 expression by NaNAC29 was clearly independent on JA pathway,since exogenous methyl jasmonate treatment could not complement the induction levels of NaDLP1 in NaNAC29-silenced plants to the levels in WT plants.Otherwise,the expression of NaNAC29 was low expressed in young leaves but highly in senescent leaves and darktreated leaves.NaNAC29-silenced plants,which were generated by virus-induced gene silencing(VIGS NaNAC29),showed delayed senescence phenotype.In addition,constitutive over-expression of NaNAC29 in A.thaliana could rescue the delayed-senescence phenotype of nap and caused precocious leaf senescence of wild-type Col-0 plants.All the data above demonstrate that NaNAC29 is a NAP homolog in N.attenuata participating in the defense responses to A.alternata by regulation of a defensin protein NaDLP1 and promoting leaf senescence.展开更多
The stock enhancement programs for black sea bream Acanthopagrus schlegelii have been conducted in China for a fewyears.However,little information has been reported concerning the effectiveness and genetic effect of b...The stock enhancement programs for black sea bream Acanthopagrus schlegelii have been conducted in China for a fewyears.However,little information has been reported concerning the effectiveness and genetic effect of black sea bream stock enhancement.In order to detect the contribution of released individuals in Zhujiang River Estuary(ZRE)and Daya Bay(DB),six microsatellite markers were used to identify the hatchery-released individuals.In addition,this pedigree of hatchery populations(broodfish and hatchery-released offspring)was traced to detect the number of effective parents(N_(e)),the inbreeding coefficient and the decrease of genetic variability in the reproduction.The pedigree reconstruction showed that at least 69(out of 93)broodfish had offspring.The estimated N_(e) was 54.8,consequently the inbreeding coefficient was 0.91%.The genetic diversity of hatchery-released offspring was lower than that in that of broodfish(heterozygosity alleles,0.727-0.774),some alleles(number of alleles,61-69)and genetic variance were lost during reproduction.It was observed that wild samples had higher levels of genetic diversity compared with hatchery populations as well as recaptured samples in releasing area.A total of 128 hatchery-released black sea bream were identified among 487 recaptured samples in ZRE,while a total of 15 samples were identified among 96 samples in DB.In summary,there was a high survival of released fish.N_(e)vertheless,the results provided evidence to consider a loss of genetic variation in hatcheryreleased stock and a negative genetic effect of the stock enhancement.展开更多
The small yellow croaker(Larimichthys polyactis)belongs to the family Sciaenidae,which is an offshore warm fish species and widely distributed in the western Pacific.In this study,the variation of genetic diversity an...The small yellow croaker(Larimichthys polyactis)belongs to the family Sciaenidae,which is an offshore warm fish species and widely distributed in the western Pacific.In this study,the variation of genetic diversity and genetic differentiation among L.polyactis populations was analyzed by mitochondrial DNA control region.A total of 110 polymorphic sites were checked,which defined 134 haplotypes.High level of haplotype diversity(h=0.993±0.002)was detected in the examined range.Population genetic structure analyse(analysis of molecular variance,Fst)showed there were high gene flow among L.polyactis populations.The result showed that there were relatively high genetic diversity and low genetic differentiation among the Yellow Sea and the East China Sea populations,which can be attributed to diverse habitats,wide distribution range and high mutation rate of control region.Using phylogenetic methods,coalescent analyses(neutrality tests,mismatch distribution analysis,Bayesian skyline analyses)and molecular dating interpreted in conjunction with paleoclimatic and physiographic evidence,we inferred that the genetic make-up of extant populations of L.polyactis was shaped by Pleistocene environmental impacts on the historical demography of this species.Besides,relatively constant genetic diversity and larger effective population size were detected in recent L.polyactis population.The result showed that the fishing policy certainly,such as the summer closed fishing,played a role in protecting resources of L.polyactis.This study can offer a wealth of biological novelties which indicates genetic structure of L.polyactis population and provides the foundation for resources protection and policy setting.展开更多
Objective: Lung carcinoma with spindle and (or) giant cell (LCSG) is a rare epithelial malignant tumor. The aim of our study is to investigate the clinicopathological and prognostic characteristics of 17 cases of...Objective: Lung carcinoma with spindle and (or) giant cell (LCSG) is a rare epithelial malignant tumor. The aim of our study is to investigate the clinicopathological and prognostic characteristics of 17 cases of LCSGs. Methods: Among 421 patients underwent resection of lung carcinomas, 17 cases of LCSG were studied for clinical, gross and histological parameters. Follow-up information was obtained and analyzed to clarify prognostically significant parameters. Results: The LCSG patients consisted of 15 males and 2 females, with the age ranging from 45 to 78 years (median, 58 years); 5 cases of stage Ⅰ, 3 of stage Ⅱ, 9 of stage Ⅲ by pathological TNM staging; 2 cases of exclusively spindle cell carcinoma, 5 cases of lung carcinoma with spindle cell, 10 cases of lung carcinoma with giant-cell carcinoma. Cough, chest distress, or chest pain were the most common presenting symptoms, occurring in 15 patients (88.2%). Of 5 patients in stage Ⅰ, 4 were alive and free of relapse for more than 5 years. The difference in survival was statistically significant between LCSG and squamous cell carcinoma patients (median survival, 36 vs. 61 months; P = 0.027). Lymph node metastasis and carcinoma with giant cell were the hazardous factors impacting postoperative prognosis of LCSG patients. Conclusion: LCSG patients in early stage may have an optimistic outcome. Lung carcinomas with giant cell displayed multiple cell components in histopathology, and poor outcome due to more lymph node involved.展开更多
AIM: To investigate the potential role of nuclear factor kappa-B (NF-κB) activation on the reactive oxygen species in rat acute necrotizing pancreatitis (ANP) and to assess the effect of pyrrolidine dithiocarbam...AIM: To investigate the potential role of nuclear factor kappa-B (NF-κB) activation on the reactive oxygen species in rat acute necrotizing pancreatitis (ANP) and to assess the effect of pyrrolidine dithiocarbamate (PDTC, an inhibitor of NF-κB).METHODS: Rat ANP model was established by retrograde injection of 5% sodium taurocholate into biliopancreatic duct. Rats were randomly assigned to three groups (10 rats each): Control group, ANP group and PDTC group. At the 6^th of the model, the changes of the serum amylase,nitric oxide (NO), malondialdehyde (MDA), superoxide dismutase (SOD) and pancreatic morphological damage were observed. The expressions of inducible nitric oxide (iNOS) were observed by SP immunohistochemistry. And bhe expressions of NF-κB p65 subunit mRNA were observed by hybridization in situ.RESULTS: Serum amylase and NO level decreased significantly in ANP group as compared with PDTC administrated group [(7 170.40+1 308.63) U/L vs(4 074.10+1 719.78) U/L,P〈0.05], [(76.95±9.04) μmol/L vs (65.18±9.02) μmol/L,P〈0.05] respectively. MDA in both ANP and PDTC group rose significantly over that in control group [(9.88+1.52)nmol/L, (8.60±1.41) nmol/L, vs (6.04:hl.78) nmol/L,P〈0.05], while there was no significant difference between them. SOD levels in both ANP and PDTC group underwent a significant decrease as compared with that in control[(3 214.59±297.74) NU/mL, (3 260.62±229.44) NU/mL,vs(3 977.80+309.09) NU/mL, P〈0.05], but there was no significant difference between them. Though they were still higher bhan those in Control group, pancreas destruction was slighter in PDTC group, iNOS expression and NF-κB p65 subunit mRNA expression were lower in PDTC group as compared with ANP group.CONCLUSION: We conclude that correlation among NF-κB activation, serum amylase, reactive oxygen species level and tissue damage suggests a key role of NF-κB in the pathogenesis of ANP. Inhibition of NF-κB activation may reverse the pancreatic damage of rat ANP and the production of reactive oxygen species.展开更多
The multi-functionalization of polymer composites refers to the ability to connect multiple properties through simple structural design and simultaneously achieve multi-performance optimization.The large-scale design ...The multi-functionalization of polymer composites refers to the ability to connect multiple properties through simple structural design and simultaneously achieve multi-performance optimization.The large-scale design and mass production to realize the reasonable structure design of multifunctional polymer composites are urgently remaining challenges.Herein,the multifunctional MXene/graphene/polymer composites with three-dimensional thermally and electrically conductive network structures are fabricated via the utilization of the microstructure of the soft template,and a facile dispersion dip-coating approach.As a result,the polymer composites have a multiperformance improvement.At the MXene and graphene content of 18.7 wt%,the superior throughplane thermal conductivity of polymer composite is 2.44 W m^(−1)K^(−1),which is 1118%higher than that of the polymer matrix.The electromagnetic interference(EMI)shielding effectiveness of the sample reaches 43.3 dB in the range of X-band.And the mechanical property of the sample has advanced 4 times compared with the polymer matrix.The excellent EMI shielding and thermal management performance,along with the effortless and easy-to-scalable producing techniques,imply promising perspectives of the polymer composites in the next-generation smart electronic devices.展开更多
Cassava,Manihot esculenta Crantz (Me),is a major dietary source of calories for over 700 million people in tropical regions.The production of cassava is constantly threatened by cassava bacterial blight (CBB),caused b...Cassava,Manihot esculenta Crantz (Me),is a major dietary source of calories for over 700 million people in tropical regions.The production of cassava is constantly threatened by cassava bacterial blight (CBB),caused by Xanthomonas axonopodis pv.manihotis (Xam).The gene resources for CBB-resistant breeding of cassava are limited.In model plant species,ethylene response factors play important roles in response to pathogen infection.In this study,cassava ethylene response factors (MeERFs) were identified and characterized as the first step in studying their potential for CBB-resistant breeding of cassava.In the cassava genome 155 MeERFs were identified,of which 23 were induced by Xam infection.The promoter regions of204 genes harbored GCC-box that had the potential to interact with MeERFs.Using 37 transcriptomes derived from Xam infection treatment,four gene co-expression modules for the MeERFs and GCC-box containing genes were constructed.Six MeERFs were associated with two GCC-box containing genes:transcription initiation factor TFIIE subunit beta (MeTFIIE),and histone-lysine N-methyltransferase ASHR1 (MeASHR1).Dual-luciferase reporter assays showed that MeERF10 and MeERF58 positively regulated Me TFIIE;MeERF137 negatively regulated Me TFIIE;MeERF10 and MeERF137 positively regulated Me ASHR1;and MeERF35 negatively regulated Me ASHR1.The four MeERFs may mediate pathogen response by regulating the expression of the two GCC-box containing genes.展开更多
Chaeturichthys stigmatias and Amblychaeturichthys hexanema belong to the family Gobiidae,which are offshore warm fish species and widely distribute in the western Pacific Ocean.In this study,the mitochondrial cytochro...Chaeturichthys stigmatias and Amblychaeturichthys hexanema belong to the family Gobiidae,which are offshore warm fish species and widely distribute in the western Pacific Ocean.In this study,the mitochondrial cytochrome c oxidase subunit I(COI)sequences and 12 S ribosomal RNA(12 S rRNA)sequences were used to analyze the interspecific differences between the two species.The phylogenetic analysis showed that the interspecific distance was significantly higher than the intraspecific genetic distance.The Neighbor-Joining tree showed two separate clusters,without sharing haplotype.The mitochondrial genome sequence of C.stigmatias was also reported.This genome was 17134 bp in size,with a high A+T content of 55.9%.The phylogenetic analysis based on the tandem 13 coding protein genes nucleotide sequences indicated that C.stigmatias showed a close relationship with A.hexanema.This study can provide the basic genetic data for two species and will help for constructing the phylogeny of the Gobiiade.展开更多
AIM: To identify the novel mutation alleles in the CYP1B1 gene of primary congenital glaucoma(PCG) patients at Shandong Province of China, and investigate their correlation with glaucomatous features.METHODS: The DNA ...AIM: To identify the novel mutation alleles in the CYP1B1 gene of primary congenital glaucoma(PCG) patients at Shandong Province of China, and investigate their correlation with glaucomatous features.METHODS: The DNA from the peripheral blood of 13 congenital glaucoma patients and 50 ethnically matched healthy controls from the affiliated hospital of Qingdao University were extracted. The coding region of the CYP1B1 gene was amplified by PCR and direct DNA sequencing was performed. Disease causing-variants were analyzed by comparing the sequences and the structures of wild type and mutant CYP1B1 proteins by PyMOL software.RESULTS: Two missense mutations, including A330 F caused by c.988 G>T&c.989 C>T, and R390H caused by c.1169 G>A, were identified in one of the 13 PCG patients analyzed in our study. A330F mutation was observed to be novel in the Chinese Han population, which dramatically altered the protein structure of CYP1B1 gene, including the changes in the ligand-binding pocket. Furthermore, R390H mutation caused the changes in heme-protein binding site of this gene. In addition, the clinical phenotype displayed by PCG patient with these mutations was more pronounced than other PCG patients without these mutations. Multiple surgeries and combined drug treatment were not effective in reducing the elevated intraocular pressure in this patient.CONCLUSION: A novel A330F mutation is identified in the CYP1B1 gene of Chinese PCG patient. Moreover, in combination with other mutation R390H, this PCG patient shows significant difference in the CYP1B1 protein structure, which may specifically contribute to severe glaucomatous phenotype.展开更多
SiewertⅡ型和Ⅲ型食管胃结合部腺癌(adenocarcinoma of the esophagogastric junction,AEG)发病率逐年上升,外科治疗是其多学科综合治疗中最主要的治疗方式。由于其解剖学部位的特殊性,在手术方式上行食管下段切除加近端胃切除术或全...SiewertⅡ型和Ⅲ型食管胃结合部腺癌(adenocarcinoma of the esophagogastric junction,AEG)发病率逐年上升,外科治疗是其多学科综合治疗中最主要的治疗方式。由于其解剖学部位的特殊性,在手术方式上行食管下段切除加近端胃切除术或全胃切除术,目前一直存在较大争议。因此,本文通过分析SiewertⅡ型和Ⅲ型的AEG患者幽门部淋巴结转移情况与肿瘤部位和肿瘤大小等关系,进一步分析行近端胃切除术和全胃切除术的术后生存率、短期并发症、长期并发症是否存在差异,从而为临床上手术方式的选择提供理论依据。展开更多
Improving the performance of reverse osmosis membranes remains great challenge to ensure excellent NaCl rejection while maintaining high water permeability and chlorine resistance. Herein, temperature-responsive intel...Improving the performance of reverse osmosis membranes remains great challenge to ensure excellent NaCl rejection while maintaining high water permeability and chlorine resistance. Herein, temperature-responsive intelligent nanocontainers are designed and constructed to improve water permeability and chlorine resistance of polyamide membranes. The nanocontainer is synthesized by layer-by-layer self-assembly with silver nanoparticles as the core, sodium alginate and chitosan as the repair materials, and polyvinyl alcohol as the shell. When the polyamide layer is damaged by chlorine attack, the polyvinyl alcohol shell layer dissolves under temperature stimulation of 37 ℃, releasing inner sodium alginate and chitosan to repair broken amide bonds. The polyvinyl alcohol shell responds to temperature in line with actual operating environment, which can effectively synchronize the chlorination of membranes with temperature response and release inner materials to achieve self-healing properties. With adding temperature-responsive intelligent nanocontainers, the NaCl rejection of thin film composite membrane decreased by 15.64%, while that of thin film nanocomposite membrane decreased by only 8.35% after 9 chlorination cycles. Effective repair treatment and outstanding chlorine resistance as well as satisfactory stability suggest that temperature-responsive intelligent nanocontainer has great potential as membrane-doping material for the targeted repair of polyamide reverse osmosis membranes.展开更多
It is essential to develop efficient electrocatalysts to generate hydrogen from water electrolysis for hydrogen economy. In this work, platinum(Pt) and nickel(Ni) co-doped porous carbon nanofibers(Pt/NiPCNFs) with low...It is essential to develop efficient electrocatalysts to generate hydrogen from water electrolysis for hydrogen economy. In this work, platinum(Pt) and nickel(Ni) co-doped porous carbon nanofibers(Pt/NiPCNFs) with low Pt content were prepared via an electrospinning, carbonization and galvanic replacement reaction. Because of the high electrical conductivity, abundant electrochemical active sites and synergistic effect between Pt and Ni nanoparticles, the optimized Pt/Ni-PCNFs catalyst shows an excellent HER activity with overpotentials of 20 m V in 0.5 mol/L H_(2)SO_(4) and 46 m V in 1 mol/L KOH at a current density of10 m A/cm^(2). Furthermore, over 35-h long-term stability has been achieved without significant attenuation.This work provides a simple route to prepare highly efficient electrocatalysts for water splitting and has great prospects in the field of renewable energy.展开更多
The ^(25)Mg(p,γ)^(26)Al reaction plays an important role in the study of cosmic 1.809 MeV γ-ray as a signature of ongoing nucleosynthesis in the Galaxy.At astrophysical temperature around 0.1 GK,the ^(25)Mg(p,γ)^(2...The ^(25)Mg(p,γ)^(26)Al reaction plays an important role in the study of cosmic 1.809 MeV γ-ray as a signature of ongoing nucleosynthesis in the Galaxy.At astrophysical temperature around 0.1 GK,the ^(25)Mg(p,γ)^(26)Al reaction rates are dominated by the 92 keV resonance capture process.We report a precise measurement of the 92 keV ^(25)Mg(p,γ)^(26)Al resonance in the day-one experiment at Jinping Underground Nuclear Astrophysics experiment(JUNA)facility in the China Jinping Underground Laboratory(CJPL).The resonance strength and ground state feeding factor are determined to be 3.8±0.3×10^(-10) eV and 0:660:04,respectively.The results are in agreement with those reported in the previous direct underground measurement within uncertainty,but with significantly reduced uncertainties.Consequently,we recommend new ^(25)Mg(p,γ)^(26)Al reaction rates which are by a factor of 2.4 larger than those adopted in REACLIB database at the temperature around 0.1 GK.The new results indicate higher production rates of ^(26g)Al and the cosmic 1.809 MeV γ-ray.The implication of the new rates for the understanding of other astrophysical situations is also discussed.展开更多
基金Supported by the Zhejiang Provincial Key Research and Development Program (No.2021C02047)。
文摘Accurate species identification is a key component of biodiversity research.DNA barcoding is an effective molecular method used for fish species identification.We aimed to study the DNA barcoding of fish in Zhoushan coastal waters,explore the differences and applicability of two gene fragments(12S rRNA and COI)of DNA barcoding in fish species identification,and established a comprehensive fish barcoding reference database.Two hundred and eighty-seven captured fish samples from Zhoushan coastal waters were identified using morphological characteristics and DNA barcoding.A total of 26412S rRNA sequences(belonging to eight orders,31 families,55 genera,and 66 species)and 188 COI sequences(belonging to seven orders,30 families,48 genera,and 58 species)were obtained.The lengths of the 12S rRNA sequences ranged from 165 to 178 bp,and the guanine-cytosine(GC)content was 45.37%.The average 12S rRNA interspecific and intraspecific genetic distances(K2P)were 0.10%and 26.66%,respectively.The length of the COI sequence ranged 574–655 bp,and the content of GC was 45.97%.The average 12S rRNA interspecific and intraspecific genetic distances(K2P)were 0.16%and 27.45%,respectively.The minimum interspecific genetic distances of 12S rRNA and COI(1.23%and 1.86%)were both greater than their maximum intraspecific genetic distances(2.42%and 8.66%).Three molecular analyses(NJ tree,ABGD,and GMYC)were performed to accurately identify and delineate species.Clustering errors occurred when the 12S rRNA sequences were delimited using the NJ tree method,and the delimitation results of ABGD and GMYC are consistent with the final species identification results.Our results demonstrate that DNA barcoding based on 12S rRNA and COI can be used as an effective tool for fish species identification,and 12S rRNA has good application prospects in the environmental DNA(eDNA)metabarcoding of marine fish.
基金The Fundamental Research Funds for the Central Universities under contract No.201964002the National Natural Science Foundation of China under contract No.U20A2087。
文摘Acanthogobius ommaturus, which belongs to the family Gobiidae, is a euryhaline and demersal fish that is widely distributed in the coastal areas, harbors, and estuaries of China, D. P. R. Korea and Japan. In this study, the genetic diversity and genetic structure of five geographical populations of A. ommaturus was assessed using the mitochondrial hypervariable region gene and microsatellite markers. The results of the two genetic markers indicated that the A. ommaturus populations had a high level of genetic diversity. The mitochondrial marker detected weak genetic differentiation among populations, and the Neighbor-Joining tree showed that there was no obvious pedigree branches and geographic structure as well. However, population of Zhoushan showed significant genetic differentiation with other populations by microsatellite markers. The population of A.ommaturus has not experienced bottleneck effect recently. We speculated that the Pleistocene climate change and juvenile fish dispersal played an important role in the population differentiation of A. ommaturus.
基金supported by the NSFC (Grant No. 31670262)Key Project of Applied Basic Research Program of Yunnan (Grant No. 2014FA040)+2 种基金100-Oversea-Top-Talents Recruitment plan of Yunnan to jinsong WuProject of Applied Basic Research Program of Yunnan(Grant No. 2017FB048) to Lan Mafounding (Grant No. 110201603008) to Dunhuang Fang
文摘Pleiotropic drug resistance(PDR) transporters are widely distributed membrane proteins catalyzing the export or import of a diverse array of molecules, and are involved in many plant responses to biotic and abiotic stresses. However, it is unclear whether PDRs are involved in Nicotiana attenuata resistance to the necrotic fungal pathogen Alternaria alternata. In this study, transcriptional levels of both NaPDR1 and NaPDR1-like were highly induced in N. attenuata leaves after A. alternata inoculation. Interestingly,silencing NaPDR1 or NaPDR1-like individually had little effect on N. attenuata resistance to A. alternata;however, when both genes were co-silenced plants became highly susceptible to the fungus, which was associated with elevated JA and ethylene responses. Neither NaPDR1 nor NaPDR1-like was significantly elicited by exogenous treatment with methyl jasmonate(MeJA), whereas both were highly induced by ethylene. The elicitation levels of both genes by A. alternata were significantly reduced in plants with impaired JA or ethylene signaling pathways. Thus, we conclude that both NaPDR1 and NaPDR1-like function redundantly to confer resistance against A. alternata in N. attenuata, and the elicitation of the transcripts of both genes by the fungus is partially dependent on ethylene and jasmonate signaling.
基金supported by the NSFC (Grant No. 31670262)Key Project of Applied Basic Research Program of Yunnan (Grant No. 2014FA040)100-Oversea-Top-Talents Recruitment plan of Yunnan to Jinsong Wu
文摘Although patatin was initially identified as a major storage protein in potato tubers, patatin-like proteins(PLPs) have been recently reported to be widely present in many plant species and shown to be involved in plant-pathogen interactions. However, it is not clear whether PLPs are involved in Nicotiana attenuata resistance against the necrotrophic fungal pathogen, Alternaria alternata. In this study we identified a NaPLP gene, whose expression was highly elicited by A. alternata inoculation. Silencing NaPLP enhanced N. attenuata resistance to A. alternata, which was associated with higher induction levels of JA and ethylene biosynthetic genes, NaACS1, NaACO1 and NaLOX3. The induction of NaPLP expression by the fungus was abolished in JA-deficient plants and significantly reduced in ethylene-insensitive plants. In addition, NaPLP transcripts were highly induced by exogenous treatment with either methyl jasmonate(MeJA) or ethephon. Co-treatment with MeJA and ethephon led to a much higher induction level of NaPLP transcripts, and this synergistic induction was largely dependent on endogenous JA and ethylene signaling pathways. Thus, we conclude that the NaPLP gene is elicited by A. alternata via JA and ethylene signaling pathways in a synergistic way; however, unlike other JA-and ethylene-induced defense genes,NaPLP negatively affects plant resistance to the fungus likely by suppressing JA and ethylene biosynthetic gene expression.
基金supported by CAS“Light of West China”Program and NSFC grant(No.31700231)to LM.
文摘NAC-LIKE,ACTIVATED BY AP3/PI(NAP)is a NAC transcription factor regulating leaf senescence in Arabidopsis thaliana.In wild tobacco Nicotiana attenuata,a nuclear localized NAC transcription factor NaNAC29 was identified to be highly elicited after inoculation of Alternaria alternata,a notorious necrotic fungus on tobacco species.The NaNAC29 possesses similar tertiary structure to NAP with 60%amino acid identity.However,it remains unknown the role of NaNAC29 in plant defense responses to A.alternata and leaf senescence in N.attenuata.In this paper,Defensin-like protein 1(NaDLP1)was highly induced in N.attenuata after A.alternata inoculation and bigger lesions were developed in NaDLP1-silenced plants.Interestingly,A.alternata-induced NaDLP1 was reduced by 76%in VIGS NaNAC29 plants and by 61%in JA deficient irAOC plants at 3 days post inoculation.The regulation of NaDLP1 expression by NaNAC29 was clearly independent on JA pathway,since exogenous methyl jasmonate treatment could not complement the induction levels of NaDLP1 in NaNAC29-silenced plants to the levels in WT plants.Otherwise,the expression of NaNAC29 was low expressed in young leaves but highly in senescent leaves and darktreated leaves.NaNAC29-silenced plants,which were generated by virus-induced gene silencing(VIGS NaNAC29),showed delayed senescence phenotype.In addition,constitutive over-expression of NaNAC29 in A.thaliana could rescue the delayed-senescence phenotype of nap and caused precocious leaf senescence of wild-type Col-0 plants.All the data above demonstrate that NaNAC29 is a NAP homolog in N.attenuata participating in the defense responses to A.alternata by regulation of a defensin protein NaDLP1 and promoting leaf senescence.
基金The Science and Technology Project of Guangdong Province under contract No.2019B121201001the National Key R&D Program of China under contract No.2019YFD0901301+3 种基金the Fund of China-Vietnam Joint Survey on Fish Stocks in the Common Fishing Zone of the Beibu Gulfthe Central Public-interest Scientific Institution Basal Research Fund,South China Sea Fisheries Research Institute,Chinese Academy of Fishery Science under contract No.2021SD14the China-ASEAN Maritime Cooperation Fund(China-Vietnam Fishery Stock Enhancement and Conservation in Beibu Gulf)the Hainan Provincial Natural Science Foundation of China under contract No.320QN358.
文摘The stock enhancement programs for black sea bream Acanthopagrus schlegelii have been conducted in China for a fewyears.However,little information has been reported concerning the effectiveness and genetic effect of black sea bream stock enhancement.In order to detect the contribution of released individuals in Zhujiang River Estuary(ZRE)and Daya Bay(DB),six microsatellite markers were used to identify the hatchery-released individuals.In addition,this pedigree of hatchery populations(broodfish and hatchery-released offspring)was traced to detect the number of effective parents(N_(e)),the inbreeding coefficient and the decrease of genetic variability in the reproduction.The pedigree reconstruction showed that at least 69(out of 93)broodfish had offspring.The estimated N_(e) was 54.8,consequently the inbreeding coefficient was 0.91%.The genetic diversity of hatchery-released offspring was lower than that in that of broodfish(heterozygosity alleles,0.727-0.774),some alleles(number of alleles,61-69)and genetic variance were lost during reproduction.It was observed that wild samples had higher levels of genetic diversity compared with hatchery populations as well as recaptured samples in releasing area.A total of 128 hatchery-released black sea bream were identified among 487 recaptured samples in ZRE,while a total of 15 samples were identified among 96 samples in DB.In summary,there was a high survival of released fish.N_(e)vertheless,the results provided evidence to consider a loss of genetic variation in hatcheryreleased stock and a negative genetic effect of the stock enhancement.
基金The National Key Research and Development Program of China under contract No.2018YFD0900905。
文摘The small yellow croaker(Larimichthys polyactis)belongs to the family Sciaenidae,which is an offshore warm fish species and widely distributed in the western Pacific.In this study,the variation of genetic diversity and genetic differentiation among L.polyactis populations was analyzed by mitochondrial DNA control region.A total of 110 polymorphic sites were checked,which defined 134 haplotypes.High level of haplotype diversity(h=0.993±0.002)was detected in the examined range.Population genetic structure analyse(analysis of molecular variance,Fst)showed there were high gene flow among L.polyactis populations.The result showed that there were relatively high genetic diversity and low genetic differentiation among the Yellow Sea and the East China Sea populations,which can be attributed to diverse habitats,wide distribution range and high mutation rate of control region.Using phylogenetic methods,coalescent analyses(neutrality tests,mismatch distribution analysis,Bayesian skyline analyses)and molecular dating interpreted in conjunction with paleoclimatic and physiographic evidence,we inferred that the genetic make-up of extant populations of L.polyactis was shaped by Pleistocene environmental impacts on the historical demography of this species.Besides,relatively constant genetic diversity and larger effective population size were detected in recent L.polyactis population.The result showed that the fishing policy certainly,such as the summer closed fishing,played a role in protecting resources of L.polyactis.This study can offer a wealth of biological novelties which indicates genetic structure of L.polyactis population and provides the foundation for resources protection and policy setting.
文摘Objective: Lung carcinoma with spindle and (or) giant cell (LCSG) is a rare epithelial malignant tumor. The aim of our study is to investigate the clinicopathological and prognostic characteristics of 17 cases of LCSGs. Methods: Among 421 patients underwent resection of lung carcinomas, 17 cases of LCSG were studied for clinical, gross and histological parameters. Follow-up information was obtained and analyzed to clarify prognostically significant parameters. Results: The LCSG patients consisted of 15 males and 2 females, with the age ranging from 45 to 78 years (median, 58 years); 5 cases of stage Ⅰ, 3 of stage Ⅱ, 9 of stage Ⅲ by pathological TNM staging; 2 cases of exclusively spindle cell carcinoma, 5 cases of lung carcinoma with spindle cell, 10 cases of lung carcinoma with giant-cell carcinoma. Cough, chest distress, or chest pain were the most common presenting symptoms, occurring in 15 patients (88.2%). Of 5 patients in stage Ⅰ, 4 were alive and free of relapse for more than 5 years. The difference in survival was statistically significant between LCSG and squamous cell carcinoma patients (median survival, 36 vs. 61 months; P = 0.027). Lymph node metastasis and carcinoma with giant cell were the hazardous factors impacting postoperative prognosis of LCSG patients. Conclusion: LCSG patients in early stage may have an optimistic outcome. Lung carcinomas with giant cell displayed multiple cell components in histopathology, and poor outcome due to more lymph node involved.
文摘AIM: To investigate the potential role of nuclear factor kappa-B (NF-κB) activation on the reactive oxygen species in rat acute necrotizing pancreatitis (ANP) and to assess the effect of pyrrolidine dithiocarbamate (PDTC, an inhibitor of NF-κB).METHODS: Rat ANP model was established by retrograde injection of 5% sodium taurocholate into biliopancreatic duct. Rats were randomly assigned to three groups (10 rats each): Control group, ANP group and PDTC group. At the 6^th of the model, the changes of the serum amylase,nitric oxide (NO), malondialdehyde (MDA), superoxide dismutase (SOD) and pancreatic morphological damage were observed. The expressions of inducible nitric oxide (iNOS) were observed by SP immunohistochemistry. And bhe expressions of NF-κB p65 subunit mRNA were observed by hybridization in situ.RESULTS: Serum amylase and NO level decreased significantly in ANP group as compared with PDTC administrated group [(7 170.40+1 308.63) U/L vs(4 074.10+1 719.78) U/L,P〈0.05], [(76.95±9.04) μmol/L vs (65.18±9.02) μmol/L,P〈0.05] respectively. MDA in both ANP and PDTC group rose significantly over that in control group [(9.88+1.52)nmol/L, (8.60±1.41) nmol/L, vs (6.04:hl.78) nmol/L,P〈0.05], while there was no significant difference between them. SOD levels in both ANP and PDTC group underwent a significant decrease as compared with that in control[(3 214.59±297.74) NU/mL, (3 260.62±229.44) NU/mL,vs(3 977.80+309.09) NU/mL, P〈0.05], but there was no significant difference between them. Though they were still higher bhan those in Control group, pancreas destruction was slighter in PDTC group, iNOS expression and NF-κB p65 subunit mRNA expression were lower in PDTC group as compared with ANP group.CONCLUSION: We conclude that correlation among NF-κB activation, serum amylase, reactive oxygen species level and tissue damage suggests a key role of NF-κB in the pathogenesis of ANP. Inhibition of NF-κB activation may reverse the pancreatic damage of rat ANP and the production of reactive oxygen species.
基金the National Natural Science Foundation of China (No. 52073168) for financially supporting this work
文摘The multi-functionalization of polymer composites refers to the ability to connect multiple properties through simple structural design and simultaneously achieve multi-performance optimization.The large-scale design and mass production to realize the reasonable structure design of multifunctional polymer composites are urgently remaining challenges.Herein,the multifunctional MXene/graphene/polymer composites with three-dimensional thermally and electrically conductive network structures are fabricated via the utilization of the microstructure of the soft template,and a facile dispersion dip-coating approach.As a result,the polymer composites have a multiperformance improvement.At the MXene and graphene content of 18.7 wt%,the superior throughplane thermal conductivity of polymer composite is 2.44 W m^(−1)K^(−1),which is 1118%higher than that of the polymer matrix.The electromagnetic interference(EMI)shielding effectiveness of the sample reaches 43.3 dB in the range of X-band.And the mechanical property of the sample has advanced 4 times compared with the polymer matrix.The excellent EMI shielding and thermal management performance,along with the effortless and easy-to-scalable producing techniques,imply promising perspectives of the polymer composites in the next-generation smart electronic devices.
基金supported by the Natural Science Foundation of Hainan Province (2018CXTD330 and 318QN204)Key R&D Program of Hainan Province (ZDYF2019063)+1 种基金China Agriculture Research System (CARS11-hncyh)the National Natural Science Foundation of China (31560497)。
文摘Cassava,Manihot esculenta Crantz (Me),is a major dietary source of calories for over 700 million people in tropical regions.The production of cassava is constantly threatened by cassava bacterial blight (CBB),caused by Xanthomonas axonopodis pv.manihotis (Xam).The gene resources for CBB-resistant breeding of cassava are limited.In model plant species,ethylene response factors play important roles in response to pathogen infection.In this study,cassava ethylene response factors (MeERFs) were identified and characterized as the first step in studying their potential for CBB-resistant breeding of cassava.In the cassava genome 155 MeERFs were identified,of which 23 were induced by Xam infection.The promoter regions of204 genes harbored GCC-box that had the potential to interact with MeERFs.Using 37 transcriptomes derived from Xam infection treatment,four gene co-expression modules for the MeERFs and GCC-box containing genes were constructed.Six MeERFs were associated with two GCC-box containing genes:transcription initiation factor TFIIE subunit beta (MeTFIIE),and histone-lysine N-methyltransferase ASHR1 (MeASHR1).Dual-luciferase reporter assays showed that MeERF10 and MeERF58 positively regulated Me TFIIE;MeERF137 negatively regulated Me TFIIE;MeERF10 and MeERF137 positively regulated Me ASHR1;and MeERF35 negatively regulated Me ASHR1.The four MeERFs may mediate pathogen response by regulating the expression of the two GCC-box containing genes.
基金The National Key R&D Program of China under contract No.2018YFD0900905the National Natural Science Foundation of China under contract No.41776171。
文摘Chaeturichthys stigmatias and Amblychaeturichthys hexanema belong to the family Gobiidae,which are offshore warm fish species and widely distribute in the western Pacific Ocean.In this study,the mitochondrial cytochrome c oxidase subunit I(COI)sequences and 12 S ribosomal RNA(12 S rRNA)sequences were used to analyze the interspecific differences between the two species.The phylogenetic analysis showed that the interspecific distance was significantly higher than the intraspecific genetic distance.The Neighbor-Joining tree showed two separate clusters,without sharing haplotype.The mitochondrial genome sequence of C.stigmatias was also reported.This genome was 17134 bp in size,with a high A+T content of 55.9%.The phylogenetic analysis based on the tandem 13 coding protein genes nucleotide sequences indicated that C.stigmatias showed a close relationship with A.hexanema.This study can provide the basic genetic data for two species and will help for constructing the phylogeny of the Gobiiade.
基金Supported by “Clinical medical+X” Project from Department of Medicine of Qingdao University
文摘AIM: To identify the novel mutation alleles in the CYP1B1 gene of primary congenital glaucoma(PCG) patients at Shandong Province of China, and investigate their correlation with glaucomatous features.METHODS: The DNA from the peripheral blood of 13 congenital glaucoma patients and 50 ethnically matched healthy controls from the affiliated hospital of Qingdao University were extracted. The coding region of the CYP1B1 gene was amplified by PCR and direct DNA sequencing was performed. Disease causing-variants were analyzed by comparing the sequences and the structures of wild type and mutant CYP1B1 proteins by PyMOL software.RESULTS: Two missense mutations, including A330 F caused by c.988 G>T&c.989 C>T, and R390H caused by c.1169 G>A, were identified in one of the 13 PCG patients analyzed in our study. A330F mutation was observed to be novel in the Chinese Han population, which dramatically altered the protein structure of CYP1B1 gene, including the changes in the ligand-binding pocket. Furthermore, R390H mutation caused the changes in heme-protein binding site of this gene. In addition, the clinical phenotype displayed by PCG patient with these mutations was more pronounced than other PCG patients without these mutations. Multiple surgeries and combined drug treatment were not effective in reducing the elevated intraocular pressure in this patient.CONCLUSION: A novel A330F mutation is identified in the CYP1B1 gene of Chinese PCG patient. Moreover, in combination with other mutation R390H, this PCG patient shows significant difference in the CYP1B1 protein structure, which may specifically contribute to severe glaucomatous phenotype.
文摘SiewertⅡ型和Ⅲ型食管胃结合部腺癌(adenocarcinoma of the esophagogastric junction,AEG)发病率逐年上升,外科治疗是其多学科综合治疗中最主要的治疗方式。由于其解剖学部位的特殊性,在手术方式上行食管下段切除加近端胃切除术或全胃切除术,目前一直存在较大争议。因此,本文通过分析SiewertⅡ型和Ⅲ型的AEG患者幽门部淋巴结转移情况与肿瘤部位和肿瘤大小等关系,进一步分析行近端胃切除术和全胃切除术的术后生存率、短期并发症、长期并发症是否存在差异,从而为临床上手术方式的选择提供理论依据。
基金This work was partially supported by the National Natural Science Foundation of China(Grant Nos.21776147,21606140,61604086,21905153 and 51472174)the Postdoc Applied Research Project Funding of Qingdao(Grant No.04000669)+3 种基金the International Science&Technology Cooperation Program of China(Grant No.2014DFA60150)the Department of Science and Technology of Shandong Province(Grant Nos.ZR2018BB066 and 2016GGX104010)the Qingdao Municipal Science and Technology Bureau(Grant No.19-6-1-91-nsh)the Department of Education of Shandong Province(Grant Nos.J16LA14 and J17KA013).Also,Dong Lifeng thanks financial support from the Malmstrom Endowed Fund at Hamline University.
文摘Improving the performance of reverse osmosis membranes remains great challenge to ensure excellent NaCl rejection while maintaining high water permeability and chlorine resistance. Herein, temperature-responsive intelligent nanocontainers are designed and constructed to improve water permeability and chlorine resistance of polyamide membranes. The nanocontainer is synthesized by layer-by-layer self-assembly with silver nanoparticles as the core, sodium alginate and chitosan as the repair materials, and polyvinyl alcohol as the shell. When the polyamide layer is damaged by chlorine attack, the polyvinyl alcohol shell layer dissolves under temperature stimulation of 37 ℃, releasing inner sodium alginate and chitosan to repair broken amide bonds. The polyvinyl alcohol shell responds to temperature in line with actual operating environment, which can effectively synchronize the chlorination of membranes with temperature response and release inner materials to achieve self-healing properties. With adding temperature-responsive intelligent nanocontainers, the NaCl rejection of thin film composite membrane decreased by 15.64%, while that of thin film nanocomposite membrane decreased by only 8.35% after 9 chlorination cycles. Effective repair treatment and outstanding chlorine resistance as well as satisfactory stability suggest that temperature-responsive intelligent nanocontainer has great potential as membrane-doping material for the targeted repair of polyamide reverse osmosis membranes.
基金financially supported by the National Natural Science Foundation of China (Nos. 5197307, 219875084)the Project of the Education Department of Jilin Province, China (No. JJKH20211047KJ)。
文摘It is essential to develop efficient electrocatalysts to generate hydrogen from water electrolysis for hydrogen economy. In this work, platinum(Pt) and nickel(Ni) co-doped porous carbon nanofibers(Pt/NiPCNFs) with low Pt content were prepared via an electrospinning, carbonization and galvanic replacement reaction. Because of the high electrical conductivity, abundant electrochemical active sites and synergistic effect between Pt and Ni nanoparticles, the optimized Pt/Ni-PCNFs catalyst shows an excellent HER activity with overpotentials of 20 m V in 0.5 mol/L H_(2)SO_(4) and 46 m V in 1 mol/L KOH at a current density of10 m A/cm^(2). Furthermore, over 35-h long-term stability has been achieved without significant attenuation.This work provides a simple route to prepare highly efficient electrocatalysts for water splitting and has great prospects in the field of renewable energy.
基金supported by the National Natural Science Foundation of China(1149056312125509U18672111196114100311775133and 12175152)the Continuous Basic Scientific Research Project No.WDJC-2019-13+1 种基金the Equipment Research and Development Project of Chinese Academy of Sciences(28Y531040)research fund of CNNC。
文摘The ^(25)Mg(p,γ)^(26)Al reaction plays an important role in the study of cosmic 1.809 MeV γ-ray as a signature of ongoing nucleosynthesis in the Galaxy.At astrophysical temperature around 0.1 GK,the ^(25)Mg(p,γ)^(26)Al reaction rates are dominated by the 92 keV resonance capture process.We report a precise measurement of the 92 keV ^(25)Mg(p,γ)^(26)Al resonance in the day-one experiment at Jinping Underground Nuclear Astrophysics experiment(JUNA)facility in the China Jinping Underground Laboratory(CJPL).The resonance strength and ground state feeding factor are determined to be 3.8±0.3×10^(-10) eV and 0:660:04,respectively.The results are in agreement with those reported in the previous direct underground measurement within uncertainty,but with significantly reduced uncertainties.Consequently,we recommend new ^(25)Mg(p,γ)^(26)Al reaction rates which are by a factor of 2.4 larger than those adopted in REACLIB database at the temperature around 0.1 GK.The new results indicate higher production rates of ^(26g)Al and the cosmic 1.809 MeV γ-ray.The implication of the new rates for the understanding of other astrophysical situations is also discussed.