The molecular phylogeny of aquatic hyphomycetes with affinity to the Leotiomycetes
The molecular phylogeny of aquatic hyphomycetes with affinity to the Leotiomycetes
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DOI：
10.1016/j.funbio.2013.07.004
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发表时间：
2013-09-01
期刊：
影响因子：
2.5
通讯作者：
Marvanova, Ludmila
中科院分区：
文献类型：
--
作者：
Baschien, Christiane;Tsui, Clement Kin-Ming;Marvanova, Ludmila
水生菌丝菌在水中有机物分解和河流生态系统功能中起着关键作用。利用42个纯培养物（包括19个前型）rDNA的内部转录间隔区（ITS）和大亚基（LSU）区域序列，研究了毛囊菌科（Leotiomycetes, Ascomycota）中各属水生菌丝菌之间的系统发育关系。这些新序列数据与从GenBank中获得的36种水生菌丝和60种相关真菌的额外序列进行了分析。水生菌丝分布在9个支撑性分支中，具有四放射状或乙状形的分生孢子。Tricladium、Lemonniera、Articulospora、Anguillospora、Varicosporium、Filosporella和Flagellospora不是单系的，同一属的物种分布在几个主要分支中。gyerffyella分支和Hymenoscyphus分支分别包含8个和6个不同属的物种。13个水生菌丝类群被归为Leotia-Bulgaria分支，12个种与若干两栖子囊菌一起归为膜隐菌分支。丝状球藻属的种和其他4个水生属的一些种被归入球藻-水螅枝。很明显，许多水生菌丝菌有陆生起源的亲戚。在多系统发育谱系中，对水生环境的适应是独立进化的。(C) 2013英国真菌学学会。Elsevier Ltd.出版。版权所有。
Aquatic hyphomycetes play a key role in decomposition of submerged organic matter and stream ecosystem functioning. We examined the phylogenetic relationships among various genera of aquatic hyphomycetes belonging to the Leotiomycetes (Ascomycota) using sequences of internal transcribed spacer (ITS) and large subunit (LSU) regions of rDNA generated from 42 pure cultures including 19 ex-types. These new sequence data were analyzed together with additional sequences from 36 aquatic hyphomycetes and 60 related fungi obtained from GenBank. Aquatic hyphomycetes, characterized by their tetraradiate or sigmoid conidia, were scattered in nine supported clades within the Helotiales (Leotiomycetes). Tricladium, Lemonniera, Articulospora, Anguillospora, Varicosporium, Filosporella, and Flagellospora are not monophyletic, with species from the same genus distributed among several major clades. The Gyoerffyella clade and the Hymenoscyphus clade accommodated species from eight and six different genera, respectively. Thirteen aquatic hyphomycete taxa were grouped in the Leotia-Bulgaria clade while twelve species clustered within the Hymenoscyphus clade along with several amphibious ascomycetes. Species of Filosporella and some species from four other aquatic genera were placed in the Ascocoryne-Hydrocina clade. It is evident that many aquatic hyphomycetes have relatives of terrestrial origin. Adaptation to colonize the aquatic environment has evolved independently in multiple phylogenetic lineages within the Leotiomycetes. (C) 2013 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.