A new compound (1) named as winchic acid and eight known ones were isolated from the stem barks of Winchia colophylla A. DC. (collected in Xishuangbanna, Yunnan Province of China). The new compound 1 was identified as...A new compound (1) named as winchic acid and eight known ones were isolated from the stem barks of Winchia colophylla A. DC. (collected in Xishuangbanna, Yunnan Province of China). The new compound 1 was identified as 3beta-hydroxy-27-(4-hydroxy-3-methoxy-E-cinnamoyloxy)-lup-20(29)-en-28-oic acid on the basis of 1D and 2D NMR experiments. The eight known compounds were determined to be lupenone, lupenyl acetate, betulinic acid, alpha-amyrin acetate, ursolic acid, ptiloepoxide, beta-amyrin and cycloeucalenol, respectively.展开更多
One new species,Uenostrongylium scaber Yuan Ren sp.nov.(China,Zhejiang),is described.Habitus and illustrations are provided,and a key to the genus Uenostrongylium is also given.
One new species of the genus Strongylium from Yunnan,China,S.dulongjiangense sp.nov.,is described.This new species is unique due to the yellow elytra and glabrous body.A list of the species in the genus Strongylium fr...One new species of the genus Strongylium from Yunnan,China,S.dulongjiangense sp.nov.,is described.This new species is unique due to the yellow elytra and glabrous body.A list of the species in the genus Strongylium from Yunnan and a key to the Chinese species of the S.rufipenne species group are provided.展开更多
A new species,Uenostrongylium gaoi Lin&Yuan sp.nov.from Guangdong,China,is described.It resembles Uenostrongylium scaber Yuan&Ren,2018 from Zhejiang due to the granulated upper edge of elytral punctures.Habitu...A new species,Uenostrongylium gaoi Lin&Yuan sp.nov.from Guangdong,China,is described.It resembles Uenostrongylium scaber Yuan&Ren,2018 from Zhejiang due to the granulated upper edge of elytral punctures.Habitus and illustrations are provided.展开更多
A new species,Synanthedon elaeagnus sp.nov.feeding on Elaeagnus mollis,is described from Shanxi,China.This new species is similar to Synanthedon ulmicola Yang&Wang,1989 in general morphology,but it differs from th...A new species,Synanthedon elaeagnus sp.nov.feeding on Elaeagnus mollis,is described from Shanxi,China.This new species is similar to Synanthedon ulmicola Yang&Wang,1989 in general morphology,but it differs from this latter species by features of the forewing,female and male genitalia.Neighbor-joining and maximum likelihood analysis both recover Synanthedon elaeagnus sp.nov.as a well-supported monophyletic lineage with a high support value based on COI gene sequences.The key features of this new species are illustrated.展开更多
Photosynthesis includes the collection of light and a/b-binding （LHC） proteins. In high plants, the LHC gene family constituting the light-harvesting complex ofphotosystems I and II. the transfer of solar energy usi...Photosynthesis includes the collection of light and a/b-binding （LHC） proteins. In high plants, the LHC gene family constituting the light-harvesting complex ofphotosystems I and II. the transfer of solar energy using light-harvesting chlorophyll includes LHCA and LHCB sub-families, which encode proteins Zostera marina L. is a monocotyledonous angiosperm and inhab- its submerged marine environments rather than land environments. We characterized the Lhca and Lhcb gene families of Z. marina from the expressed sequence tags （EST） database. In total, 13 unigenes were annotated as ZmLhc, 6 in Lhca family and 7 in ZmLhcb family. ZmLHCA and ZmLHCB contained the conservative LHC motifs and amino acid residues binding chlorophyll. The average similarity among mature ZmLHCA and ZmLHCB was 48.91% and 48.66%, respectively, which indicated a high degree of diver- gence within ZmLHChc gene family. The reconstructed phylogenetic tree showed that the tree topology and phylogenetic relation- ship were similar to those reported in other high plants, suggesting that the Lhc genes were highly conservative and the classification of ZmLhc genes was consistent with the evolutionary position of Z. marina. Real-time reverse transcription （RT） PCR analysis showed that different members of ZmLhca and ZmLhcb responded to a stress in different expression patterns. Salinity, temperature, light intensity and light quality may affect the expression of most ZmLhca and ZmLhcb genes. Inorganic carbon concentration and acidity had no obvious effect on ZmLhca and ZmLhcb gene expression, except for ZmLhca6.展开更多
Yushu Tibetan Autonomous Prefecture, an area located in the Qinghai-Tibet Plateau, is an area very sensitive to global climate change. Due to impacts from climate change and human disturbances, grassland vegetation in...Yushu Tibetan Autonomous Prefecture, an area located in the Qinghai-Tibet Plateau, is an area very sensitive to global climate change. Due to impacts from climate change and human disturbances, grassland vegetation in the area has been degraded and desertification has been expanding. Ecosystems in the area are very sensitive and fragile and ecological problems have become increasingly serious in the area, resulting in an adverse effect on the local socio-economic development and environment of Qinghai province. Using data gathered from Landsat TM/ETM images for 1987, 1997 and 2007, we analyzed landscape patterns across Yushu Prefecture. Spatial structure indices indicated that： （i） the area of grassland has significantly decreased in the form of degradation and conversion from grassland into bare land and farmland; （ii） grassy vegetation patches changed into fragmented and isolated patches; （iii） the main landscapes in Yushu Prefecture are grasslands, forests and rivers; （iv） patches of grass have reiatively high connectivity; and （v） landscape change is significantly correlated with human activities and climate change. This study provides a strong theoretical and technical basis for policy-making regarding environmental protection of and management in Yushu Prefecture of Qinghai Province.展开更多
ASYMMETRIC LEAVES2/LATERAL ORGAN BOUNDARIES（AS2/LOB） genes are a family of plant specific transcription factors, which play an important role in the regulation of plant lateral organ development and metabolism. Howe...ASYMMETRIC LEAVES2/LATERAL ORGAN BOUNDARIES（AS2/LOB） genes are a family of plant specific transcription factors, which play an important role in the regulation of plant lateral organ development and metabolism. However, a genome-wide analysis of the AS2/LOB gene family is still not available for barley. In the present study, 24 AS2-like（ASL）/LOB domain（LBD） genes were identified based on the barley（Hordeum vulgare L.） genome sequence. A phylogenetic tree of ASL/LBD proteins from barley, Arabidopsis, maize, and rice was constructed. The ASL/LBD genes were classified into two classes, class I and class II, which were divided into five and two subgroups, respectively. Genes homologous in barley and Arabidopsis were analyzed. In addition, the structure and chromosomal locations of the genes were analyzed. Expression profiles indicated that barley HvA SL/LBD genes exhibit a variety of expression patterns, suggesting that they are involved in various aspects of physiological and developmental processes. This genome-wide analysis of the barley AS2/LOB gene family contributes to our understanding of the functions of the AS2/LOB gene family.展开更多
文摘A new compound (1) named as winchic acid and eight known ones were isolated from the stem barks of Winchia colophylla A. DC. (collected in Xishuangbanna, Yunnan Province of China). The new compound 1 was identified as 3beta-hydroxy-27-(4-hydroxy-3-methoxy-E-cinnamoyloxy)-lup-20(29)-en-28-oic acid on the basis of 1D and 2D NMR experiments. The eight known compounds were determined to be lupenone, lupenyl acetate, betulinic acid, alpha-amyrin acetate, ursolic acid, ptiloepoxide, beta-amyrin and cycloeucalenol, respectively.
基金supported by the National Natural Science Foundation of China(31501888)the Scientific Research Projects of the Shaanxi Education Department(15JK1837)the High-level University Construction Projects Funded Projects of Shaanxi Province(2012SXTS03)
文摘One new species,Uenostrongylium scaber Yuan Ren sp.nov.(China,Zhejiang),is described.Habitus and illustrations are provided,and a key to the genus Uenostrongylium is also given.
基金supported by the National Natural Science Foundation of China(31960113)the Doctoral Scientific Research Project of Yan’an University(YDBK2017-06)。
文摘One new species of the genus Strongylium from Yunnan,China,S.dulongjiangense sp.nov.,is described.This new species is unique due to the yellow elytra and glabrous body.A list of the species in the genus Strongylium from Yunnan and a key to the Chinese species of the S.rufipenne species group are provided.
基金supported by the National Natural Science Foundation of China(31960113)the Doctoral Scientific Research Project of Yan’an University(YDBK2017-06)GDAS Special Project of Science and Technology Development(2020GDASYL-20200102021,2020GDASYL-20200301003)。
文摘A new species,Uenostrongylium gaoi Lin&Yuan sp.nov.from Guangdong,China,is described.It resembles Uenostrongylium scaber Yuan&Ren,2018 from Zhejiang due to the granulated upper edge of elytral punctures.Habitus and illustrations are provided.
基金supported by the National Natural Science Foundation of China(31772508)。
文摘A new species,Synanthedon elaeagnus sp.nov.feeding on Elaeagnus mollis,is described from Shanxi,China.This new species is similar to Synanthedon ulmicola Yang&Wang,1989 in general morphology,but it differs from this latter species by features of the forewing,female and male genitalia.Neighbor-joining and maximum likelihood analysis both recover Synanthedon elaeagnus sp.nov.as a well-supported monophyletic lineage with a high support value based on COI gene sequences.The key features of this new species are illustrated.
基金supported by the Key Science and Technology Program of Shandong Province (Grant no.2012GHY11527)the Public Science and Technology Research Funds Projects of Ocean,State Oceanic Administration of China (Grant no.201105021)
文摘Photosynthesis includes the collection of light and a/b-binding （LHC） proteins. In high plants, the LHC gene family constituting the light-harvesting complex ofphotosystems I and II. the transfer of solar energy using light-harvesting chlorophyll includes LHCA and LHCB sub-families, which encode proteins Zostera marina L. is a monocotyledonous angiosperm and inhab- its submerged marine environments rather than land environments. We characterized the Lhca and Lhcb gene families of Z. marina from the expressed sequence tags （EST） database. In total, 13 unigenes were annotated as ZmLhc, 6 in Lhca family and 7 in ZmLhcb family. ZmLHCA and ZmLHCB contained the conservative LHC motifs and amino acid residues binding chlorophyll. The average similarity among mature ZmLHCA and ZmLHCB was 48.91% and 48.66%, respectively, which indicated a high degree of diver- gence within ZmLHChc gene family. The reconstructed phylogenetic tree showed that the tree topology and phylogenetic relation- ship were similar to those reported in other high plants, suggesting that the Lhc genes were highly conservative and the classification of ZmLhc genes was consistent with the evolutionary position of Z. marina. Real-time reverse transcription （RT） PCR analysis showed that different members of ZmLhca and ZmLhcb responded to a stress in different expression patterns. Salinity, temperature, light intensity and light quality may affect the expression of most ZmLhca and ZmLhcb genes. Inorganic carbon concentration and acidity had no obvious effect on ZmLhca and ZmLhcb gene expression, except for ZmLhca6.
基金National Natural Science Foundation of China (No.30970506)111 project of MUC(B.08004)
文摘Yushu Tibetan Autonomous Prefecture, an area located in the Qinghai-Tibet Plateau, is an area very sensitive to global climate change. Due to impacts from climate change and human disturbances, grassland vegetation in the area has been degraded and desertification has been expanding. Ecosystems in the area are very sensitive and fragile and ecological problems have become increasingly serious in the area, resulting in an adverse effect on the local socio-economic development and environment of Qinghai province. Using data gathered from Landsat TM/ETM images for 1987, 1997 and 2007, we analyzed landscape patterns across Yushu Prefecture. Spatial structure indices indicated that： （i） the area of grassland has significantly decreased in the form of degradation and conversion from grassland into bare land and farmland; （ii） grassy vegetation patches changed into fragmented and isolated patches; （iii） the main landscapes in Yushu Prefecture are grasslands, forests and rivers; （iv） patches of grass have reiatively high connectivity; and （v） landscape change is significantly correlated with human activities and climate change. This study provides a strong theoretical and technical basis for policy-making regarding environmental protection of and management in Yushu Prefecture of Qinghai Province.
基金supported by the National Natural Science Foundation of China(Nos.31401370 and 31571648)the National Barley and Highland Barley Industrial Technology Specially Constructive Foundation of China(No.CARS-05)+2 种基金the Jiangsu Agriculture Science and Technology Innovation Fund(No.CX(12)5084)Jiangsu Training Programs of Innovation and Entrepreneurship for Undergraduates(No.201611117090X)the Priority Academic Program Development of Jiangsu Higher Education Institutions,China
文摘ASYMMETRIC LEAVES2/LATERAL ORGAN BOUNDARIES（AS2/LOB） genes are a family of plant specific transcription factors, which play an important role in the regulation of plant lateral organ development and metabolism. However, a genome-wide analysis of the AS2/LOB gene family is still not available for barley. In the present study, 24 AS2-like（ASL）/LOB domain（LBD） genes were identified based on the barley（Hordeum vulgare L.） genome sequence. A phylogenetic tree of ASL/LBD proteins from barley, Arabidopsis, maize, and rice was constructed. The ASL/LBD genes were classified into two classes, class I and class II, which were divided into five and two subgroups, respectively. Genes homologous in barley and Arabidopsis were analyzed. In addition, the structure and chromosomal locations of the genes were analyzed. Expression profiles indicated that barley HvA SL/LBD genes exhibit a variety of expression patterns, suggesting that they are involved in various aspects of physiological and developmental processes. This genome-wide analysis of the barley AS2/LOB gene family contributes to our understanding of the functions of the AS2/LOB gene family.
