Plant Science Journal最新文献_第8页

Phylogenetic Structure of a Rare Plant Community in Houhe Nature Reserve over Time and Space 后河自然保护区珍稀植物群落系统发育结构的时空特征

Plant Science Journal Pub Date : 2013-01-01 DOI: 10.3724/SP.J.1142.2013.50454

K. Zhang, Dachuan Bao, Yili Guo, Zhijun Lu, Handong Huang, M. Jiang

{"title":"Phylogenetic Structure of a Rare Plant Community in Houhe Nature Reserve over Time and Space","authors":"K. Zhang, Dachuan Bao, Yili Guo, Zhijun Lu, Handong Huang, M. Jiang","doi":"10.3724/SP.J.1142.2013.50454","DOIUrl":"https://doi.org/10.3724/SP.J.1142.2013.50454","url":null,"abstract":"The phylogenetic structure of a community is composed of all genetic relationships between species across the community. Understanding the phylogenetic structure of a community will help reveal the relative importance of habitat filteringꎬ competitive exclusion and the stochastic processes constructing the community. We studied a rare plant community in a 1 hm permanent plot in Houhe Nature Reserveꎬ Hubei Province. We examined the effects of spatial scales (5 m×5 mꎬ 10 m×10 mꎬ 20 m×20 mꎬ 30 m×30 mꎬ 40 m×40 mꎬ and 50 m× 50 m) and DBH classes (5 cm≤DBH<10 cmꎬ 10 cm≤DBH<15cmꎬ 15 cm≤DBH<20 cmꎬ and DBH≥20 cm) at spatial scales (10 m ×10 mꎬ 20 m×20 mꎬ 30 m ×30 mꎬ 40 m ×40 mꎬ and 50 m×50 m) on phylogenetic structure of the community in a subtropical evergreen and deciduous broadleaf mixed forest. The results demonstrated thatꎬ with increasing spatial scaleꎬ the phylogenetic structure tended to cluster. The degree of phylogenetic clustering decreased with increasing DBH classes. Howeverꎬ the degree of phylogenetic clustering was very high at the scale of DBH≥20 cm. The phylogenetic structures of the communities were random at the scale of 25 m and clustered at scales of 100 m and largerꎬ indicating that neutrality may play a leading role at small scales and niche processes may be more important at large scales for community assembly in subtropical evergreen and deciduous broadleaf mixed forest in this case.","PeriodicalId":20134,"journal":{"name":"Plant Science Journal","volume":"31 1","pages":"454"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69789295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ISSR Analysis on Genetic Diversity of Medically Important Lycium ruthenicum Murr. in Xinjiang 药用枸杞遗传多样性的ISSR分析。在新疆

Plant Science Journal Pub Date : 2013-01-01 DOI: 10.3724/SP.J.1142.2013.50517

Qimike Alitong, Qing‐Feng Wang, Chun-Feng Yang, Jin‐Ming Chen

{"title":"ISSR Analysis on Genetic Diversity of Medically Important Lycium ruthenicum Murr. in Xinjiang","authors":"Qimike Alitong, Qing‐Feng Wang, Chun-Feng Yang, Jin‐Ming Chen","doi":"10.3724/SP.J.1142.2013.50517","DOIUrl":"https://doi.org/10.3724/SP.J.1142.2013.50517","url":null,"abstract":"Lycium ruthenicum(Solanaceae)is an important medicinal plant mainly distributed in Northwestern China.In recent years,however,the distribution range of this species has been reduced greatly due to human overexploitation and deterioration of its habitat.Studying the population genetics of this species is essential for the conservation and sustainable utilization of the plant germplasm resource.In this study,we used seven ISSR markers to measure genetic diversity of 115individuals from eight natural populations of L.ruthenicumin Xinjiang(six populations)and Gansu(two populations).A total of 64DNA fragments were scored,and 78.1%of polymorphic loci(PPL)found.High level of genetic diversity was detected in L.ruthenicum(H=0.29;Ⅰ=0.43).AMOVA analysis indicated that most variance(77.0%)resided within populations,with only a small proportion of total variation residing between populations(23%,FST=0.23).Results of the Mantel test(r=0.3602,p=0.910)and UPGMA cluster of the Xinjiang populations indicated that there was no significant relationship between geographical distance and genetic distance.UPGMA cluster of all sampled individuals showed that individuals from each population did not cluster together.The probable causes that have contributed to the current pattern of genetic structure were discussed and suggestions on future protection of the L.ruthenicumfrom southern Xinjiang were also given.","PeriodicalId":20134,"journal":{"name":"Plant Science Journal","volume":"31 1","pages":"517"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69789459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Ultrastructural Observation on Embryo Sac Development inPhaius tankervilliae(Aiton)Bl. 褐褐phaius tankervillae (Aiton)Bl胚囊发育的超微结构观察。

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.20188

Dong-Mei Li, Chenggang Wu, X. Ye, C. Liang

引用次数: 1

Optimization and Establishment of SRAP-PCR in Lotus 荷花SRAP-PCR的优化与建立

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.10085

Mei Yang, Liming Xu, Yan-Ling Liu

引用次数: 0

Diversity of Aquatic Vascular Plants in the Yangtze Delta 长江三角洲水生维管植物的多样性

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.30238

Yuexin Zhang, Guangfu Zhang, Yue Li, Ling-Ling Li, Lipeng Yu

引用次数: 2

Current Status and Conservation Strategies of Wild Orchid Resources in Guangxi Yachang Forests 广西雅昌林区野生兰花资源现状及保护对策

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.30285

Chang-Lin Feng, Zhenping Deng, D. Cai, TianChang Wu, Hongyan Jia, L. Bai, Zulun Zhao, Yong-zhong Su

{"title":"Current Status and Conservation Strategies of Wild Orchid Resources in Guangxi Yachang Forests","authors":"Chang-Lin Feng, Zhenping Deng, D. Cai, TianChang Wu, Hongyan Jia, L. Bai, Zulun Zhao, Yong-zhong Su","doi":"10.3724/SP.J.1142.2012.30285","DOIUrl":"https://doi.org/10.3724/SP.J.1142.2012.30285","url":null,"abstract":"The Yachang forest region is rich in wild orchid diversity,with 156 orchid species belonging to 52 genera distributed in the hills throughout the Yachang Orchid Nature Reserve.The orchids' distribution in the Yachang region is,however,uneven and naturally or unnaturally fragmented.In particular,there are sixteen distribution hotspots with large concentrations of orchid species and populations within the region.The continuing existence of these rich wild orchid resources are threatened by disturbance from human activities,livestock grazing,and other fast-changing environmental conditions within the Yachang region.We recommend that the conservation strategies of the wild orchids in Yachang should include primarily of in-situ conservation measures,supplemented by ex-situ conservation.Yachang Orchid Nature Reserve should complete and improve its protection facilities as soon as possible,including the completion of a wild orchid germplasm bank,construction of fences around orchid-rich areas that are subject to heavy herbivory from livestock,and intensification of foot-patrols in these areas.","PeriodicalId":20134,"journal":{"name":"Plant Science Journal","volume":"9 1","pages":"285"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69787142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Evaluation on the Application Value of Identification in Cucurbitaceae by ITS2 ITS2在葫芦科植物鉴定中的应用价值评价

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.60631

Yin-lin Tang, Y. Liu, H. Yao, Zhendong Chen, Yaosheng Wu, Penghong Xu, Dongping Jiang

引用次数: 0

Relationships between Geographical Distribution of EndangeredPinus kwangtungensisand Climate in China 中国濒危光东松地理分布与气候的关系

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.60577

C. Tao, Xiao-xiao Li, Qing-chun Wang, Guo-fa Cui

引用次数: 2

Purification of Polysaccharide from the Laminae of Elaeagnus mollis Diels with Chitosan Flocculation 壳聚糖絮凝法纯化白菖蒲叶多糖

Plant Science Journal Pub Date : 2012-01-01 DOI: 10.3724/SP.J.1142.2012.60639

Jinghai Zhao, Jun-ping Liu, Xiaochen Sun, Xiao-Jun Zhang, Zhi‐Feng Zhang, Guiwen Yan