New Neotyphodium endophyte species from the grass tribes Stipeae and Meliceae
New Neotyphodium endophyte species from the grass tribes Stipeae and Meliceae
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DOI：
10.1080/15572536.2007.11832521
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发表时间：
2007-11
期刊：
影响因子：
2.8
通讯作者：
C. Moon;J. Guillaumin;C. Ravel;Chunjie Li;K. Craven;C. Schardl
中科院分区：
文献类型：
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作者：
C. Moon;J. Guillaumin;C. Ravel;Chunjie Li;K. Craven;C. Schardl
几种Achnatherum（禾本科Stipeae）和Melica（Meliceae）通常被非致病性种子传播真菌感染，具有Neotyphodium物种（无性型棒孢菌科）的特征。分子系统学研究表明，内生菌与产自新疆的醉马草Achnatheruminebrians，A. robustum和A. eminens（均来自北美），并指出A. inebrians内生菌在Epichiacidum和Neotyphodium内包含一个独特的非杂交谱系，而A. robustum和A. eminens是与多个Epichapericum物种（全纯型棒形藻科）作为祖先的杂交种。同样，Neotyphodium种与欧洲臭草属种M. ciliata和M. transsilvanica，南非种M. decumbens和M. racemosa和南美种M. stuckertii。Neotyphodium种已从A.中国甘肃省的inebrians（N. gansuense）、毛茛A. eminens（N. chisosum），M. stuckertii（N.南非臭草属Melica species（N. melicicola）。而A. robustum和欧洲臭草属（Melica）种的系统发育关系尚不清楚。甘肃没有调查。在这里，我们报告了一个全面的形态学特征和β-微管蛋白和肌动蛋白基因序列的系统发育分析的扩大收集从针茅和蜜蜂科内生菌。这些数据为描述Neotyphodium属两个新种N. guerinii从M. ciliata和M. transsilvanica和N. funkii从A.粗壮我们还提出了新变种N.甘肃变种inebrians为A.在形态学和遗传学上与新疆的N.甘肃产的一种植物。
Several species of Achnatherum (grass tribe Stipeae) and Melica (tribe Meliceae) typically are infected by nonpathogenic, seed-transmissible fungi with characteristics of Neotyphodium species (anamorphic Clavicipitaceae). Molecular phylogenetic studies clearly have distinguished the endophytes from Achnatherum inebrians (from Xinjiang Province, China), A. robustum and A. eminens (both from North America) and indicate that the A. inebrians endophyte comprises a unique nonhybrid lineage within the Epichloë and Neotyphodium phylogeny, whereas the endophytes of A. robustum, and A. eminens are hybrids with multiple Epichloë species (holomorphic Clavicipitaceae) as ancestors. Likewise distinct hybrid origins are indicated for Neotyphodium species from the European Melica species, M. ciliata and M. transsilvanica, the South African species M. decumbens and M. racemosa, and the South American species M. stuckertii. Neotyphodium species have been described from A. inebrians from Gansu Province, China, (N. gansuense), A. eminens (N. chisosum), M. stuckertii (N. tembladerae) and the South African Melica species (N. melicicola). However the endophytes from A. robustum and the European Melica species have not been described and the phylogenetic relationships of N. gansuense have not been investigated. Here we report a comprehensive study of morphological features and phylogenetic analyses of β-tubulin and actin gene sequences on an expanded collection of endophytes from the Stipeae and Meliceae. These data provide a firm foundation for the description of two new Neotyphodium species, N. guerinii from M. ciliata and M. transsilvanica, and N. funkii from A. robustum. We also propose the new variety, N. gansuense var. inebrians for endophytes of A. inebrians from Xinjiang Province, which are morphologically and phylogenetically distinct from, yet clearly related to, N. gansuense from Gansu Province.