东亚和东南亚地区唇鳞苔属分类学研究

项目名称： 东亚和东南亚地区唇鳞苔属分类学研究

项目编号： No.31500170

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 生物科学

项目作者： 叶文

作者单位： 中国科学院华南植物园

项目金额： 21万元

中文摘要： 唇鳞苔属是细鳞苔科的第三大属，包含80-100种，主要分布于热带和亚热带地区。东亚和东南亚地区是该属的分布中心之一（52种），物种数约占属内总种数的一半。近期的分子系统发育研究支持广义唇鳞苔属的处理，重新界定了属的范围。该属自从建立以来一直未被全面修订过，特别是东亚和东南亚地区，物种多样性尚未清晰，物种界限尚不明确。本项目将参考新的分子系统骨架，对东亚和东南亚的唇鳞苔属植物主要分类特征进行综合分析，讨论性状的变异规律，为建立属下分类系统提供形态学依据。通过标本研究和野外考察，研究唇鳞苔属植物形态的变异式样，解决分类上和命名上的问题，同时结合分子生物学证据，确定疑难种的系统位置。最终确认该属在东亚和东南亚地区的真实物种多样性，完成该区域唇鳞苔属的全面修订。项目的开展有助于对唇鳞苔属和细鳞苔科系统发育的进一步了解，并将为全面了解世界唇鳞苔属的物种多样性奠定基础，为多样性保护提供依据。

中文关键词： 分类；多样性；苔类植物；分类修订

英文摘要： The genus Cheilolejeunea is the third largest genus in Lejeuneaceae, consisting of approximately 80 to 100 species that widely distributed in the tropical and subtropical regions. East and Southeast Asia regions are one of the distribution centers of Cheilolejeunea, with 52 species recorded, which account for about half of the species within the genus. The circumscription of Cheilolejeunea has been re-delimitated by recent molecular phylogeny studies, in which the results support a broad concept of this genus. However, the genus has never been revised since established. This holds especially true for species in the East and Southeast Asia regions. Species diversity there is yet to be clarified, as well as the delimitations of species. With reference to the up-to-date backbones of Cheilolejeunea, the present program will provide morphological evidence for infrageneric classification on the basis of studies both on phylogeneric variation patterns and morphology of main charactistics of Cheilolejeunea in East and Southeast Asia. The taxonomic and nomenclature problems will be solved based on analyses of variation pattern of morphology of Cheilolejeunea through field investigation and examination of herbarium specimens. In combine with molecular evidence, the systematic position of difficult species will also be determined. Accordingly the true diversity of the genus will be confirmed. On this ground, the taxonomic revision of Cheilolejeunea in East and Southeast Asia will be accomplished. The present program will allow us to further understand the phylogeny of Cheilolejeunea and Lejeuneaceae. The knowledge of the diversity of Cheilolejeunea in East and Southeast Asia will lay foundations for a comprehensive knowledge of this genus worldwide, as well as the conservation of the genus.

英文关键词： taxonomy;diversity;liverwort;taxonomic revision