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Classification of Partial pteridophytes in Jinyun Mountain of Chongqing City Based on SRAP Molecular Marker

Agricultural Science & Technology 2011年第9期12卷 1273-1275,1285页

作者：党辉沈洁罗安才柳建平重庆师范大学生命科学学院重庆400047

[Objective] The aim was to classify pteridophytes by using SRAP molecular marker.[Method] 27 species of pteridophytes collected from Jinyun Mountain in Chongqing were classified based on SRAP molecular *** tender leaves of the 27 species of city pteridophytes were use for extracting genonic DNA of pteridophytes by using improved CPAB method,and then the quality of total DNA was tested by using gel-lectro phoresis method and obsorbance method.[Result] The results of clustering analysis showed that there was close genetic relationship between Selaginellaceae and Gleicheniaceae,Equisaceae and Dryopteridaceae,Blechnaceae and Dryopteridaceae,Lindsaeaceae and Dryopteridaceae,Aspleniaceae and *** genetic relationship between Cyrtomium fortunei and Dryopteridaceae differed from traditional taxonomy that classified Cyrtomium fortunei in Dryopteridaceae,indicating that classification of pteridophytes by SRAP molecular marker technology had some differences from traditional taxonomy.[Conclusion] The results can be referred to rebuild phylogenetic relationships of pteridophytes.

关键词： pteridophytes SRAP Classification

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Relative importance of water, energy, and heterogeneity in determining regional pteridophyte and seed plant richness in China

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Journal of Systematics and Evolution 2011年第2期49卷 95-107页

作者： 1,2,3 Sheng-Bin CHEN § 1 Gao-Ming JIANG 3 Zhi-Yun OUYANG 3 Wei-Hua XU 3 Yi XIAO 1 (State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China) 2 (Graduate University of the Chinese Academy of Sciences, Beijing 100049, China) 3 (State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China) StateKeyLaboratoryofVegetationandEnvironmentalChange InstituteofBotanyChineseAcademyofSciencesBeijing100093China GraduateUniversityoftheChineseAcademyofSciences Beijing100049China

Environmental variables, such as ambient energy, water availability, and environmental heterogeneity have been frequently proposed to account for species diversity gradients. How taxon-specific functional traits define large-scale richness gradients is a fundamental issue in understanding spatial patterns of species diversity, but has not been well documented. Using a large dataset on the regional flora from China, we examine the contrast spatial patterns and environmental determinants between pteridophytes and seed plants which differ in dispersal capacity and environmental requirements. Pteridophyte richness shows more pronounced spatial variation and stronger environmental associations than seed plant richness. Water availability generally accounts for more spatial variance in species richness of pteridophytes and seed plants than energy and heterogeneity do, especially for pteridophytes which have high dependence on moist and shady environments. Thus, pteridophyte richness is disproportionally affected by water-related variables; this in turn results in a higher proportion of pteridophytes in regional vascular plant floras (pteridophyte proportion) in wet regions. Most of the variance in seed plant richness, pteridophyte richness, and pteridophyte proportion explained by energy is included in variation that water and heterogeneity account for, indicating the redundancy of energy in the study extent. However, heterogeneity is more important for determining seed plant distributions. Pteridophyte and seed plant richness is strongly correlated, even after the environmental effects have been removed, implying functional linkages between them. Our study highlights the importance of incorporating biological traits of different taxonomic groups into the studies of macroecology and global change biology.

关键词： habitat heterogeneity pteridophytes seed plants species richness water-energy hypothesis.

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A Biosystematic Study on Asplenium sarelii Complex

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Acta Botanica Sinica 2003年第1期45卷 1-14页

作者：王中仁王可青张方侯鑫中国科学院植物研究所系统与进化植物学重点实验室北京100093

The series Variantia Ching et S. H. Wu mainly occur in China and its members are highly variable in morphology. The denomination on this group of Asplenium is very confused in the herbaria. We hop e by means of a biosystematic study to find out their genetic relationships in the reticulate evolution, and to raise a suggestion on their taxonomic treatment. Evidence from cytology, allozyme, morphology, and palynology shows that three ancestor diploids have formed Asplenium sarelii complex comprising 13 members. A. sarelii Hook. should be typified as a diploid. The so-called tetraploid 'A. sarelii' before is an allotetraploid that comes from the doubled hybrid between diploid A. sarelii and A. tenuicaule Hayata, which should be treated as a new species A. wudangense Z. R. Wang et X. Hou. A. pekinense Hance is an autotetraploid that comes from the doubled diploid ancestor A. sarelii. A. lushanense C. Chr., a diploid species and the only ancestor of A. yunnariense group, should not been sunk as a synonym of tetraploid A. yunnariense Franch. Most probably, A. varians Wall. ex Hook. et Grev. is an autotetraploid of A. tenuicaule Hayata. Three new natural tetraploid hybrids and their origins have been found out: they are A. x longmenense ( = A. pekinense x varians), A. x jingyunense ( = A. pekinense x yunnanense) and A. x kidoi ( = A. pekinense x wudangense). Three other new natural triploid hybrids have been found and their origins have been inferred: they are A. X huawuense ( = A. sarelii X wudangense), A. x luyunense ( = A. lushanense x yunnanense) and A. x teniuvaians ( = A. tenuicaule x varians). The method of allozyme comparion combined with cytological observation is employed to reveal the complicated relationships among the members of Asplenium sarelii complex in reticulate evolution and proved to be a highly effective tool to investigate the origin of polyploid and hybrid.

关键词： pteridophytes Asplenium L. biosystematics reticulate evolution cytology allozyme China

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Pteridophyte Flora of Manaslu Conservation Area, Central Nepal

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American Journal of Plant Sciences 2017年第4期8卷 680-687页

作者： Shreehari Bhattarai Sangeeta Rajbhandary Central Department of Botany Tribhuvan University Kathmandu Nepal

The pteridophytes comprising ferns and fern allies constitute an important part in Nepalese flora. Pteridophyte flora of the Himalayan region is considered to be the basic requirements for the knowledge of pteridology. This paper aims to provide the overview of fern and fern allies present in the Nubri valley and its adjoining areas of Manaslu Conservation Area (MCA), Central Nepal. A total of 105 species belonging to 45 genera were recorded, with Dryopteris as the largest genera including twelve species followed by Athyrium, Pteris and Polystichum. With regard to habitats, most of the species were terrestrials followed by lithophytes and epiphytes.

关键词： pteridophytes Manaslu Conservation Area Habitat

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