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Molecular Identification of Mycobacterium Strains Responsible of Bovine Tuberculosis Cases in Bobo-Dioulasso Slaughterhouse, Burkina Faso
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作者 Mariétou Konate Aminata Fofana# +2 位作者 Yacouba Kouadima Aboubacar Sidiki Ouattara Adama Sanou 《Advances in Microbiology》 CAS 2024年第2期105-114,共10页
Bovine tuberculosis (bTB) is an endemic zoonosis significantly affects animal health in Burkina Faso. The primary causative agent is Mycobacterium tuberculosis (M. tuberculosis) complex, mainly M. bovis. Cattle are co... Bovine tuberculosis (bTB) is an endemic zoonosis significantly affects animal health in Burkina Faso. The primary causative agent is Mycobacterium tuberculosis (M. tuberculosis) complex, mainly M. bovis. Cattle are considered as natural reservoir of M. bovis. However, in Burkina Faso, the circulation of these strains remains poorly understood and documented. This study aimed to identify and characterize Mycobacterium strains from suspected carcasses during routine meat inspection at Bobo-Dioulasso refrigerated slaughterhouse. A prospective cross-sectional study was conducted from January 2021 to December 2022 on cases of seizures linked to suspected bovine tuberculosis. Microbiological and molecular analyzes were used for mycobacterial strain isolation and characterization. Out of 50 samples, 24% tested positive by microscopy and 12% by culture. Molecular analysis identified 6 strains of Mycobacteria, exclusively Mycobacterium bovis specifically the subspecies bovis (Mycobacterium bovis subsp bovis). In conclusion, M. bovis subsp bovis is the primary agent responsible for bovine tuberculosis in Bobo-Dioulasso. Continuous monitoring of mycobacterial strains is therefore necessary for the effective control of this pathology in the local cattle population. 展开更多
关键词 Bovine Tuberculosis Mycobacterium bovis molecular identification Cattle Population Burkina Faso
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Morphological and Molecular Identification of Fungi Associated with Sesame Diseased Plants of the Three Agroclimatic Zones of Burkina Faso
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作者 Wendolian Romain Soalla Pawindé Elisabeth Zida +1 位作者 Bouma James Neya Kadidia Koita 《American Journal of Plant Sciences》 CAS 2023年第3期290-307,共18页
Sesame is Burkina Faso’s second essential agricultural export after cotton. It’s consequently a supply of income for producers and foreign exchange for the country. However, sesame production is characterized by low... Sesame is Burkina Faso’s second essential agricultural export after cotton. It’s consequently a supply of income for producers and foreign exchange for the country. However, sesame production is characterized by low average yields of about 538 kg·ha<sup>-1</sup> at the farmer’s field as compared to the potential yield of the improved varieties (1500 - 2000 kg·ha<sup>-1</sup>). Fungal diseases are some of the major constraints to sesame production in Burkina Faso. The present study contributes to the development of means to control pathogenic fungi of this crop, which are responsible for significant losses. The objective is to identify the fungi associated with diseased sesame plant samples. To this end, 149 samples of diseased sesame plants were collected from different production sites located in three agro-climatic zones of the country. The analysis of the samples according to the blotting paper method, based on the morphological characteristics of the fungi, allowed the identification of 18 genera with prevalence rates from 2.68% to 97.98%. The most frequently identified genera were Macrophomina (97.98%), Cercospora (86.57%), Fusarium (85.23%), Phoma (62.41%) and Colletotrichum (61.07%). The results also showed a variable distribution of fungi according to the agro-climatic zone with the predominance of Macrophomina in all three zones. Molecular identification by DNA sequencing of 120 isolates belonging to the different fungi detected allowed the identification of 25 species of which the most representative were Macrophomina phaseolina, Cercospora sesami, Corynespora cassiicola, Alternaria simsimi, Alternaria porri, Fusarium oxysporum, F. fujikuroi, F. equiseti, Colletotrichum capsici, and C. gloesporiodes. The present study showed that diseased sesame plants collected from different production sites in Burkina Faso housed several species of fungi. The fungi presence in diseased plants indicates the need to inform and raise the stakeholders’ awareness about the phytosanitary problems of sesame, but also to develop effective and appropriate control methods against these crop pathogens in Burkina Faso. 展开更多
关键词 Burkina Faso FUNGI molecular identification Morphological identification SESAME
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Morphology and Molecular Identification of Dry Fish Fungus Cunninghamella blakesleeana from Small Indigenous Fish “Kachki” Corica soborna (Hamilton 1822) in Bangladesh
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作者 Abdullah Al Masud Ismot Ara Nuhu Alam 《American Journal of Plant Sciences》 2023年第11期1316-1326,共11页
The present experiment was conducted to investigate a dry fish fungus, Cunnighamella blakesleeana, which was identified from the infected part of the Corica soborna, locally named as Kachki fish. Mycelium was hyaline,... The present experiment was conducted to investigate a dry fish fungus, Cunnighamella blakesleeana, which was identified from the infected part of the Corica soborna, locally named as Kachki fish. Mycelium was hyaline, often with granular content, and conidiophores were erected, with verticillate or solitary branches. Zygospores were globose, tuberculate, suspensors equal, smooth, hyaline and heterothallic. Using ITS4 and ITS5 primers, the 740 bp-long ITS region was amplified and sequenced. The ITS region sequences had reciprocal homologies of 98% to 100%. The findings showed that several species of C. blakesleeana fall into the same cluster. It has been determined by molecular data that the fungus we had studied was C. blakesleeana. The maximum mycelial growth (95.33 mm) was observed in the PDA medium, followed by the PSA medium, and the lowest growth (65.50 mm) was measured in the HPA medium in the study of the impact of culture media on the mycelial growth of C. blakesleeana. The influence of temperature on the radial mycelial growth of C. blakesleeana on PDA medium was investigated through five different temperatures. Although pH is a crucial factor in understanding the ecology of spoilage fungus, the highest mycelial growth of C. blakesleeana (88.25 mm) was seen at pH 7, followed by pH 8 and pH 6, while pH 9 was revealed to have the lowest mycelial growth. The outcome suggested that C. blakesleeana thrived in neutral environments. 展开更多
关键词 Culture Media molecular identification Temperature pH Vegetative Growth
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Molecular Identification of Alternaria alternate (Fr.) Keissl. from the Leaf Blight Disease of Centella asiatica L.
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作者 Nusrat Binte Alam Farhana Rahman Md. Nuhu Alam 《Natural Science》 2023年第8期223-232,共10页
Centella asiatica (L.), frequently known as Thankuni, is an important ethnobotanical plant in Bangladesh. This study was conducted to evaluate the morphological characteristics, cultural factors and molecular identifi... Centella asiatica (L.), frequently known as Thankuni, is an important ethnobotanical plant in Bangladesh. This study was conducted to evaluate the morphological characteristics, cultural factors and molecular identification of the causal agent of Alternaria leaf blight disease of C. asiatica. The potato dextrose agar (PDA) medium recorded the maximum mycelial growth (69 mm), followed by the yeast extract agar (YEA) medium, while the honey peptone agar (HPA) medium recorded the lowest growth (27 mm). The optimal pH and temperature for mycelial growth of Alternaria alternata were 6 and 30°C, respectively. Internal transcribed spacer (ITS) region of Alternaria alternata PCR products measured 558 bp and blast search showed 99% sequence similarity with Alternaria alternata species complex. To the best of our knowledge, Alternaria leaf blight disease caused by Alternaria alternata is the first record in Bangladesh. 展开更多
关键词 Alternaria alternata Centella asiatica molecular identification Mycelial Growth
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Establishment of Molecular Biological Method for Identification of Bacteria by 16S rDNA and gyrB Gene
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作者 Xiaxia HOU Yunxia WANG +1 位作者 Cuizhi LI Zhiyong LU 《Asian Agricultural Research》 2023年第4期21-25,共5页
[Objectives]The paper was to establish a molecular biological method for identification of bacterial strains.[Methods]The thalli of standard bacterial strains existing in the laboratory were collected and genomic DNA ... [Objectives]The paper was to establish a molecular biological method for identification of bacterial strains.[Methods]The thalli of standard bacterial strains existing in the laboratory were collected and genomic DNA was extracted for amplification of 16S rDNA and gyrB gene.The 16S rDNA and gyrB gene sequences were obtained after sequencing.Sequences were aligned and analyzed via EzBioCloud and NCBI database,and phylogenetic trees were constructed to determine the species relationship of strains.Meantime,they were compared with known strains.[Results]This method could identify 5 standard strains accurately to the species level.The 16S rDNA and gyrB gene sequences were aligned and analyzed in EzBioCloud database and NCBI database.The strain with the max score was consistent with the known strain.And the query cover and ident were both above 99%.[Conclusions]The established molecular biological method for identification of bacterial strains by 16S rDNA and gyrB gene has good accuracy,which effectively solves the problem that the laboratory identification of bacteria relies on traditional methods and the accuracy can not be guaranteed,and further improves the identification ability of laboratory bacterial strains. 展开更多
关键词 16S rDNA GYRB Bacterial identification molecular biological method
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DNA Molecular Identification of Botanical Origin in Chinese Herb Qingjiao 被引量:1
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作者 张得钧 高庆波 +1 位作者 李福安 李永平 《Agricultural Science & Technology》 CAS 2011年第9期1286-1290,共5页
[Objective] The research aimed to distinguish Chinese herb Qingjiao from its botanical origin plants by comparing different DNA sequences,so as to provide a molecular basis for origin identification and quality evalua... [Objective] The research aimed to distinguish Chinese herb Qingjiao from its botanical origin plants by comparing different DNA sequences,so as to provide a molecular basis for origin identification and quality evaluation.[Method] The cpDNA psbA-trnH and nrDNA ITS sequences of five Chinese herb Qingjiao plants,including Gentiana macrophylla pall.,Gentiana straminea Maxim.,Gentiana crassicaulis Duthie ex Burk.,Gentiana dahurica Fisch and Gentiana officinalis H.Smith,were amplified with PCR,and then sequenced by direct PCR sequencing method for homologous analysis.[Results] The length of cpDNA psbA-trnH of five plants was 316-318 bp;there were seven different haplotypes and seven variable sites;the GC content of the sequence was 21.2%;the phylogenetic clustering showed the same result as haplotype analysis.The length of nrDNA ITS sequence of five plants was 624-625 bp,there were five different haplotypes and 13 variable sites;the GC content of the sequence was 59.3%.The result of phylogenetic clustering suggested that G.dahurica and G.straminea,G.macrophylla and G.officinalis clustered together as sister clades,respectively.[Conclusion] The nucleotide differences of nrDNA ITS regions could be used for distinguishing botanical origin in Chinese herb Qingjiao. 展开更多
关键词 Chinese herb Qingjiao psbA-trnH sequences ITS sequences PCR DNA molecular identification
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DNA Extraction and Molecular Identification of Green Tea
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作者 刘本英 孙雪梅 +1 位作者 汪云刚 王平盛 《Agricultural Science & Technology》 CAS 2010年第11期98-102,共5页
[Objective] The aim of this study was to provide reference for the quality identification of green tea.[Method] Green Tea was used as materials,and its total DNA was extracted through improved CTAB method.And the obta... [Objective] The aim of this study was to provide reference for the quality identification of green tea.[Method] Green Tea was used as materials,and its total DNA was extracted through improved CTAB method.And the obtained DNA was used to carry out identification on 10 varieties of green tea through ISSR molecular markers.[Result] The high quality DNA from green tea could be obtained with new method,the DNA yield ranged from 101-498 μg/g tea sample for various green tea samples,and the average yield was 249 μg/g tea sample.The ISSR detection result showed that ISSR markers could effectively differentiate different varieties of green tea.[Conclusion] The result had provided reference for the further study on molecular identification of green tea. 展开更多
关键词 Green tea DNA extraction ISSR molecular identification
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Systematic Evaluation of Pharmacognostic Identification of Polygonum capitatum 被引量:1
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作者 Bo TU Xu ZHANG +3 位作者 Minghui HE Shanggao LIAO Yongqin ZENG Yan LIN 《Medicinal Plant》 CAS 2023年第4期9-13,共5页
[Objectives] To investigate the systematic evaluation of pharmacognostic identification of Polygonum capitatum . [Methods] 10 batches of P. capitatum cultivated in Guizhou were chosen for plant samples. Macroscopical ... [Objectives] To investigate the systematic evaluation of pharmacognostic identification of Polygonum capitatum . [Methods] 10 batches of P. capitatum cultivated in Guizhou were chosen for plant samples. Macroscopical identification was conducted on plant roots, stems, leaves, flowers and fruits. The P. capitatum powder was processed for physical and chemical distinction by FeCl 3 chromogenic reaction, hydrochloric acid magnesium powder reaction, AlCl 3 color development reaction and thin-layer chromatography.Microscope identification was carried out on the powder. Plant genome DNeasy Plant Kit was adopted for DNA molecular marker identification. [Results] The results showed that the stem of P. capitatum was tufted, the leaves were oval, 2 to 5 cm long, and 1 to 2 cm wide;the leaf apex was acute and cuneate at the base, the inflorescence was capitate, paired or solitary;the raceme was erect and nearly spherical, and the perianth was light red. Furthermore, for the chromogenic reaction of FeCl 3 ethanol extract of P. capitatum , appeared blue and turned to dark blue after long time storing at room temperature. For the reaction of hydrochloric acid magnesium powder, the alcohol extract of P. capitatum , exhibited deep red. In the color reaction of AlCl 3, the alcohol extract revealed yellow fluorescence under 360 nm UV lamp. Microscope identification of the powder displayed pollen grains, crystal sheath fibers, cellulose, vessels, starch grains, cork cells, and other characteristic fragments. In addition, DNA barcoding electrophoresis results showed that P. capitatum showed a clear and bright single band near 500 bp, and further sequencing results showed that the sequence differences were mainly concentrated in ITS1 and ITS2 region. [Conclusions] Systematic evaluation for the identification of P. capitatum is established, which combines with macroscopic identification, physicochemical identification, powder microscope identification, and DNA molecular identification. Finally, the original medicinal material is identified as P. capitatum Buch.-Ham. ex D. Don. 展开更多
关键词 Chinese herbal medicine Polygonum capitatum Pharmacognostic identification Character identification Physical and chemical identification Microscopic identification DNA molecular marker identification
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Identification and Purity Test of Super Hybrid Rice with SSR Molecular Markers 被引量:9
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作者 XINYe-yun ZHANGZhan +1 位作者 XIONGYi-ping YUANLong-pin 《Rice science》 SCIE 2005年第1期7-12,共6页
Five super hybrid rice combinations, i.e. HYS-1/R105, Pei'ai 64S/E32, Liangyoupeijiu (Pei'ai 64S/9311), 88S/0293, and J23A/Q611, and their parental lines were tested by means of SSR analysis. A total of 144 SS... Five super hybrid rice combinations, i.e. HYS-1/R105, Pei'ai 64S/E32, Liangyoupeijiu (Pei'ai 64S/9311), 88S/0293, and J23A/Q611, and their parental lines were tested by means of SSR analysis. A total of 144 SSR primer pairs distributed on 12 rice chromosomes were used, out of which 47 detected polymorphism among the tested rice lines. Among all these primers, RM337 and RM154 produced polymorphic patterns in four or more of the tested experimental materials respectively, and they could distinguish among most rice genotypes tested. Twenty-four primer pairs, two on each rice chromosome, were selected to make a reference SSR marker-based fingerprinting for the rice lines. For most of the primer pairs, F1 hybrids mainly showed complementary pattern of both parents, which could be very useful to distinguish the F1 from its parental lines. In addition, 5 primer pairs were selected as special primer pairs for five hybrid rice combinations respectively. By combining the rapid, simple method on DNA extraction, it is suggested that SSR technique has wide prospective in variety authentication and purity identification. 展开更多
关键词 SSR molecular marker super hybrid rice identification PURITY
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Identification and molecular mechanism of angiotensin-converting enzyme inhibitory peptides from Larimichthys crocea titin 被引量:7
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作者 Yue Fan Zhipeng Yu +4 位作者 Wenzhu Zhao Long Ding Fuping Zheng Jianrong Li Jingbo Liu 《Food Science and Human Wellness》 SCIE 2020年第3期257-263,共7页
This study aimed to identify novel ACEI peptides from Larimichthys crocea titin using in silico approaches and to clarify the molecular interaction mechanism.The hydrolyzed peptides of titin were compared with known A... This study aimed to identify novel ACEI peptides from Larimichthys crocea titin using in silico approaches and to clarify the molecular interaction mechanism.The hydrolyzed peptides of titin were compared with known ACEI peptides in the AHTPDB and BIOPEP-UWM database.Furthermore,peptides were evaluated for their solubility,ADMET properties,ΔG(kcal/mol)values,and in vitro ACEI activity.Molecular mechanism of ACE-peptide was performed by molecular interactions and binding orientation study.The results revealed that IC50 values of Trp-Ala-Arg(WAR)and Trp-Gln-Arg(WQR)were(31.2±0.8)and(231.33±0.02)mol/L,respectively.The docking interactions result suggested that ACE-WAR and ACEWQR complexes have same binding site,including the residues LYS511,TYR520,TYR523,HIS353,and HIS513.Molecular docking of two tripeptides WAR and WQR with ACE studies predicted their binding site and clarified the interaction between ACE and its inhibitors.The molecular docking data are consistent with the ACE inhibitory activity of the studied peptides.The results showed that Larimichthys crocea titin may be a valuable source for developing nutraceutical food. 展开更多
关键词 ACE peptide identification In silico approaches ADMET molecular docking
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Molecular identification and culture observation on Acrochaete leptochaete (Chaetophoraceae, Chlorophyta) from China 被引量:3
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作者 邓蕴彦 汤晓荣 +2 位作者 黄冰心 滕林宏 丁兰平 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第3期476-484,共9页
Acrochaete leptochaete (Huber) Nielsen (Chaetophoraceae, Chlorophyta) was isolated from the macroalgae Chaetomorpha collected from intertidal pools in Rongcheng, Shandong, China. 18S rDNA combined with ITS regions... Acrochaete leptochaete (Huber) Nielsen (Chaetophoraceae, Chlorophyta) was isolated from the macroalgae Chaetomorpha collected from intertidal pools in Rongcheng, Shandong, China. 18S rDNA combined with ITS regions were used to ascertain the morphological identification of the isolated material. Based on the unialgal culture, asexual reproduction and growth characteristics of A. leptochaete were investigated over wide ranges of temperature and irradiance. Results revealed that asexual reproduction of A. leptochaete could be realized by biflagellate zoospores. The zoospores germinated directly to give self- replicating generations. Zoospore germination was bipolar. A temperature range from 13-21 ℃ and a lower irradiance of 36 μmol/(m2.s) were most favorable for the growth ofA. leptochaete. Thallus organization, an important taxonomic criterion for the genus Acrochaete, was affected markedly by temperature and irradiance. Our results extend the knowledge about the species' general biology and its morphological plasticity. For classification and identification of a simple microphytic algae like A. leptochaete, which are traditionally placed in the class Chaetophoraceae, we propose that molecular tools associated with culture observations are applied. 展开更多
关键词 Acrochaete leptochaete asexual reproduction culture observation growth characteristics molecular identification
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Epidemiological situation and molecular identification of cercarial stage in freshwater snails in Chao-Phraya Basin, Central Thailand 被引量:1
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作者 Sothorn Anucherngchai Thanawan Tejangkura Thapana Chontananarth 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2016年第6期539-545,共7页
Objective: To investigate the prevalence of cercarial trematode infection in snails and to examine the reconstruction of the phylogenetic relationship to explain the molecular system of cercarial stage trematodes to e... Objective: To investigate the prevalence of cercarial trematode infection in snails and to examine the reconstruction of the phylogenetic relationship to explain the molecular system of cercarial stage trematodes to estimate the infection rate of in the definite host from the Chao-Phraya Basin.Methods: The snails were collected from 10 provinces of the Chao-Phraya Basin,Thailand by stratified sampling method. The snails were examined for cercarial infection by the crushing method. All DNA specimens were amplified with internal transcribed spacer 3(ITS3) and ITS4 primer based on PCR technique. The sequence data were aligned and used to reconstruct the phylogenetic tree by unweighted pair-group method with arithmetic means with 10 000 bootstraps.Results: The overall rate of cercarial infection was found to be 5.90%(122/2 067). Snails in the family Thiaridae were found to be in the highest prevalence followed by Lymnaeidae, Bithyniidae, Planorbidae, Viviparidae, and Ampullariidae, respectively, while the Buccinidae family(Clea helena) did not reveal any infections. The frequently found species of cercariae were parapleurolophocercous cercariae, cercariae and megarulous cercariae. The monophyletic tree separated the snails into five groups comprised of Heterophyidae, Strigeidae, Lecithodendriidae, Philophthalmidae and Echinostomatidae using the sequence of Angiostrongylus cantonensis as an out-group.Conclusions: This study was the first to report on cercarial infection in the Chao-Phraya Basin, Thailand. This revealed that a high variety of freshwater snails were infected by cercariae stage trematodes with a high prevalence. The sequence data of ITS2 can be used to investigate the phylogenetic relationships of trematodes at the family level and in each clade of different families separated by the definitive hosts. 展开更多
关键词 PREVALENCE molecular identification Cercarial infection FRESHWATER SNAILS Thailand
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Molecular genetic strategies for species identification 被引量:3
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作者 徐艳春 白素英 +1 位作者 金煜 景松岩 《Journal of Forestry Research》 CAS CSCD 2000年第4期249-251,共3页
This paper probes into the molecular genetic mechanism of the formation of species, subspecies and variety in evolving progression, and brings forward 5 criteria of an ideal strategy in species identification: stating... This paper probes into the molecular genetic mechanism of the formation of species, subspecies and variety in evolving progression, and brings forward 5 criteria of an ideal strategy in species identification: stating the specific characteristics at species, subspecies and variety level without any interference of too high polymorphism at individual or population level; keys should be distributed as 0 or 1, e. g. yes or no; satisfying repeatability and simple operation; high veracity and reliability; adaptability to widely various specimen. Respectively, this paper reviews two strategies focusing on detecting the fragment length polymorphism and base replacement and lays out some detail methods under above strategies. It demonstrates that it is not possible to solve all species problems by pursuing identification with only a single gene or DNA fragment. Only based on thorough consideration of all strategies, a method or combined several methods could bring satisfying reliability. For advanced focuses, it requires not only development and optimization of methods under above strategies, but also new originality of creative strategies. 展开更多
关键词 Species identification molecular genetics Forensic scie?
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Identification of the sources of polycyclic aromatic hydrocarbons based on molecular and isotopic characterization from the Yangtze estuarine and nearby coastal areas 被引量:1
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作者 OU Dongni LIU Min +3 位作者 CHENG Shubo HOU Lijun XU Shiyuan WANG Lili 《Journal of Geographical Sciences》 SCIE CSCD 2010年第2期283-294,共12页
Samples of suspended particulate matters (SPMs), surface sediment and road dust were collected from the Yangtze estuarine and nearby coastal areas, coastal rivers, and central Shanghai. The samples were analyzed for... Samples of suspended particulate matters (SPMs), surface sediment and road dust were collected from the Yangtze estuarine and nearby coastal areas, coastal rivers, and central Shanghai. The samples were analyzed for the presence of 16 polycyclic aromatic hydrocarbons (PAHs) in the USEPA priority-controlled list by GC-MS. The compound-specific stable carbon isotopes of the individual PAHs were also analyzed by GC-C-IRMS. The sources of PAHs in the SPMs and surface sediments in the Yangtze estuarine and nearby coastal areas were then identified using multiple source identification techniques that integrated molecular mass indices with organic compound-specific stable isotopes. The results revealed that 3-ring and 4-ring PAH compounds were dominant in the SPMs and surface sediments, which are similar to the PAH compounds found in samples from the Wusong sewage discharge outlet, Shidongkou sewage disposal plant, Huangpu River, coastal rivers and central Shanghai. Principal component analysis (PCA) integrated with molecular mass indices indicated that gasoline, diesel, coal and wood combustion and petroleum-derived residues were the main sources of PAHs in the Yangtze Estuary. The use of PAH compound-specific stable isotopes also enabled identification of the PAHs input pathways. PAHs derived from wood and coal combustion and petroleum-derived residues were input into the Yangtze Estuary and nearby coastal areas by coastal rivers, sewage discharge outlets during the dry season and urban storm water runoff during the flood season. PAHs derived from vehicle emissions primarily accumulated in road dust from urban traffic lines and the commercial district and then entered the coastal area via the northwest prevailing winds in the dry season and storm water runoff during flood season. 展开更多
关键词 PAHs source identification compound-specific stable isotope molecular mass index the Yangtze Estuary
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The Utility of Specific Markers Based on ITS2 Sequences for Molecular Identification and Detection of Trichogramma spp. 被引量:1
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作者 LI Zheng-xi and SHEN Zuo-rui(Department of Entomology, China Agricultural University, Beijing 100094 , P.R.China) 《Agricultural Sciences in China》 CAS CSCD 2002年第9期998-1005,共8页
The technology based on specific PCR amplification using internal transcribed spacer 2 of nuclear ribosomal DNA for molecular identification and detection of Trichogramma species was studied. Firstly the ITS2s of six ... The technology based on specific PCR amplification using internal transcribed spacer 2 of nuclear ribosomal DNA for molecular identification and detection of Trichogramma species was studied. Firstly the ITS2s of six Trichogramma species were cloned and sequenced, and the interspecific sequence variation was analyzed. Secondly the ITS2 regions of six geographical populations of T. dendrolimi were cloned and sequenced, and the intraspecific sequence identity was analyzed. The results show that the interspecific variation and intraspecific similarity of ITS2 sequences are very suitable for designation of specific primers at species-level. Screening of specific primers for T. dendrolimi leads to final sensitive and stable diagnostic primers. This system lets non-specialists can not only identify adults (males and females), but also identify eggs in parasitized hosts rapidly and accurately, which is impossible by conventional methods. Further development of this protocol can create a complete set of specific primers for different species of the whole genus Trichogramma . 展开更多
关键词 Specific marker ITS2-rDNA molecular identification TRICHOGRAMMA
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Establishment of a molecular tool for blood meal identification in Malaysia 被引量:1
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作者 Ernieenor Faraliana Che Lah Mariana Ahamad +1 位作者 Mohd Subail Haron Ho Tze Ming 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2012年第3期223-227,共5页
Objective:To establish a polymerase chain reaction(PCR) technique based on cytochrome b {cytb) gene of mitochondria DNA(mtDNA) for blood meal identification.Methods:The PCR technique was established based on published... Objective:To establish a polymerase chain reaction(PCR) technique based on cytochrome b {cytb) gene of mitochondria DNA(mtDNA) for blood meal identification.Methods:The PCR technique was established based on published information and validated using blood sample of laboratory animals of which their whole gene sequences are available in CenBank.PCR was next performed to compile gene sequences of different species of wild rodents.The primers used were complementary to the conserved region of the cytb gene of vertebrate's mtDNA.A total of 100 blood samples,both from laboratory animals and wild rodents were collected und analyzed.The obtained unknown sequences were compared with those in the GenBank database using BLAST program to identify the vertebrate animal species.Results:Gene sequences of 11 species of wild animals caught in 9 localities of Peninsular Malaysia were compiled using the established PCR. The animals involved were Rattus(rattus) tanezumi,Rattus tiomanicus,Leopoldamys sabanus, Tupaia glis,Tupaia minor,Niviventor cremoriventor,Rhinosciurus laticaudatus,Calloseiurus caniseps,Sundamys muelleri,Rattus rajah,and Maxomys whitelwadi.The BLAST results confirmed the host with exact or nearly exact matches(>89%identity).Ten new gene sequences have been deposited in CenBank database since September 2010.Conclusions:This study indicates that the PCR direct sequencing system using universal primer sets for vertebrate cytb gene is a promising technique for blood meal identification. 展开更多
关键词 molecular TOOL BLOOD MEAL identification Polymerase chain reaction Cytochrome b BLOOD MEAL Mitochondria DNA Gene sequence Vertebrate Primer GENBANK database
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Molecular Identification and Cultivar Fingerprints of Prunus persica (L.) Batsch Germplasms 被引量:3
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作者 SUN Shu-xia LI Jing JIANG Guo-liang CHEN Dong XIE Hong-jiang TU Mei-yan 《Agricultural Science & Technology》 CAS 2010年第7期1-5,8,共6页
[Objective] The aim was to study the molecular identification and cultivar fingerprints of Prunus persica (L.) Batsch germplasms.[Method] Sixty peach genotypes,representing China common local cultivars and European sa... [Objective] The aim was to study the molecular identification and cultivar fingerprints of Prunus persica (L.) Batsch germplasms.[Method] Sixty peach genotypes,representing China common local cultivars and European samples were screened by microsatellites (simple sequence repeats,SSRs) and Inter-Simple Sequence Repeat (ISSR) markers.[Result] 26 reproducible bands were amplified by Nine SSR primers,and 24 of which were polymorphic; 236 bands were amplified by 30 ISSR primers,and 113 of which were polymorphic.31 genotypes were discriminated with 1-3 distinct polymorphic bands generated from the primers ISSR and SSR.Seven cultivar-specific ISSR fragments and two SSR unique alleles obtained from this study were available to be converted into Sequence Characterized Amplified Region (SCAR) markers.The genetic similarity coefficient (GS) estimated from these molecular data averaged were 0.939 (ranged from 0.856 to 0.983) for ISSR and 0.646 (ranged from 0.240 to 1.000) for SSR,respectively.The combined grouping association indicated that most local Chinese peach cultivars and exotic accessions were clustered together.This could be related to the mode of introduction and maintenance of the peach cultivars involving limited foundation germplasm,exchange of cultivars between plantations,and periodic development of new recombinant cultivars following sexual reproduction.[Conclusion] The results obtained in this work would help to improve the conservation,molecular identification and management of peach germplasm in breeding. 展开更多
关键词 Genetic variability ISSR molecular identification Prunus persica (L.) Batsch SSR
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Molecular-based Integrated Identification of Bacterial Blight(Xanthomonas axonopodis pv. dieffenbachiae) in Anthurium and Detection of Latent Infection 被引量:1
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作者 Niu Junhai Gao Yuerong +4 位作者 Leng Qingyun Yang Guangsui Lin Xinge Zhang Zhiqun Yin Junmei 《Plant Diseases and Pests》 CAS 2014年第5期25-29,共5页
Bacterial blight, caused by Xanthomonas axonopodis pv. dieffenbachiae (Xad), is the most destructive disease of anthurium worldwide, and no effective control technique has been developed currently. The comprehensive... Bacterial blight, caused by Xanthomonas axonopodis pv. dieffenbachiae (Xad), is the most destructive disease of anthurium worldwide, and no effective control technique has been developed currently. The comprehensive survey and precise detection of the pathogen is essential for evaluating disease progress and strengthening management to avoid a serious epidemic. In this study, a total of 253 blight-suspected samples of anthurum and other Araceae species were collected across the country, and 166 potential pathogenic bacteria strains were isolated and purified, after combined analysis on the characteristics of morphology, pathoge- nicity, 16S rDNA sequences and amplicans of Xad-specific SCAR markers. Finally, 93 of which were considered as X. axonopod/s pv. dieffenbachiae. In addition, by using a nested-PCR in repeated detections, 17 out of 21 prevalent anthurium cultivars without blight symptom exhibited latent infection even in young leaves. The results indicated that the anthurium bacterial blight distributed commonly in growing areas in China, and most of the commercial cuhivars had no strong resistance. The identification of Xad infection (latent) would be beneficial for the disease forecasting and management improving in anthttrium production. 展开更多
关键词 ANTHURIUM Bacterial blight Xanthomonas axonopodis pv. dieffenbachiae molecular identification
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Pathogenicity Assay and Molecular Identification of Fungi and Bacteria Associated with Diseases of Tomato in Malaysia 被引量:1
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作者 Tavga Sulaiman Rashid Kamaruzaman Sijam +2 位作者 Hayman Kakakhan Awla Halimi Mohd Saud Jugah Kadir 《American Journal of Plant Sciences》 2016年第6期949-957,共9页
This study was conducted in order to determine the fungi and bacteria associated with tomato plants at Cameron Highlands Malaysia. The fungi which have been isolated and detected from tomato plants were: Fusarium oxys... This study was conducted in order to determine the fungi and bacteria associated with tomato plants at Cameron Highlands Malaysia. The fungi which have been isolated and detected from tomato plants were: Fusarium oxysporum, F. solani, F. acuminatum, Rhizoctonia solani, Colletotrichum boninense, C. acutatum and Phoma destructiva. The bacteria which have been isolated and detected from tomato plants were: Ralstonia solanacearum, Xanthomonas vesicatoria, X. gardneri and Pseudomonas syringae. While the most pathogenic fungi were C. boninense, P. destructive and F. oxysporum with the disease incidence (89.6%, 86.6%, 85.6%) respectively, the most pathogenic bacteria were X. vesicatoria and R. solanacearum with the disease incidence (96.6% and 87.6%) respectively. 展开更多
关键词 Lycopersicon esculentum Pathogen Isolation and molecular identification
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Isolation, Molecular Identification and under Lab Evaluation of the Entomopathogenic Fungi <i>M. anisopliae</i>and <i>B. bassiana</i>against the Red Palm Weevil <i>R. ferrugineus</i>in Gaza Strip 被引量:1
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作者 Abboud Y.El Kichaoui Bara’a A.Abu Asaker Mahmoud W.El-Hindi 《Advances in Microbiology》 2017年第1期109-124,共16页
Plant diseases generate challenging problems in commercial, agriculture and pose real economic threats to both conventional and organic farming systems. The red palm weevil (Rhynchophorus ferrugineus) (RPW) is one of ... Plant diseases generate challenging problems in commercial, agriculture and pose real economic threats to both conventional and organic farming systems. The red palm weevil (Rhynchophorus ferrugineus) (RPW) is one of the most destructive pests of palms in the world. Nowadays, control methods revolve around treatments based on chemicals, biotechnological systems using semi-chemicals or the development of the sterile insect technique (hardly sustainable at this time) and biological control. Biological control as the use of natural microorganisms, extracted products from microorganisms or genetically improved to resist or eliminate of pathogens. Our aim was to evaluate the entomopathogenicity of indigenous Beauveria bassiana and Metarhizium anisopliae obtained in Gaza strip against larvae and adults of R. ferrugineus in order to identify indigenous strains potentially suitable for Red Palm Weevil biological control. B. bassiana & M. anisopliae were isolated from larvae and adult dead of RPW from different position of Gaza strip. Morphological analysis of the isolated fungi and molecular identification was determined using PCR technique. Also, the efficiency of the isolated fungi were evaluated under lab conditions and optimized as a biological agent. On the anther hand, the ability of treated RPW male to infect females is examined and calculated using Abbott's formula. Our results showed that the B. bassiana and M. anisopliae exhibited a good biological control agent against larvae and adults of RPW. The pathogenicity of the two most virulent isolates and the toxicity assay on larvae showed a highest mortality percentage nearly to 100% by 6 days after spraying the larvae with 3.4 × 108 spores/ml of B. bassiana. The mortality percentage reaches to 90% after spraying the larvae with 3.6 × 108 spores/ml of M. anisopliae. The mortality for the adults treated with pesticide arrives to 50% and the control group 10% at the same time. The results revealed that the infection of the adult males by Entomopathogenic fungi (EPF) can be disseminated into the healthy population, after RPW treatment with B. bassiana and M. anisopliae. Our research concludes that B. bassiana and M. anisopliae locally isolated can be used as biological very effective. 展开更多
关键词 B. bassiana M. anisopliae Red PALM WEEVIL molecular identification BIOCONTROL
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