A new stromata-producing Neotyphodium species symbiotic with clonal grass Calamagrostis epigeios (L.) Roth. grown in China
A new stromata-producing Neotyphodium species symbiotic with clonal grass Calamagrostis epigeios (L.) Roth. grown in China
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一种新的产生子座的 Neotyphodium 物种与克隆草 Calamagrostis epigeios (L.) Roth 共生。
DOI：
10.3852/08-044
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发表时间：
2009-03-01
期刊：
影响因子：
2.8
通讯作者：
Wang, Zhi-wei
中科院分区：
文献类型：
--
作者：
Ji, Yan-ling;Zhan, Li-hui;Wang, Zhi-wei
我们描述了一种新的产生子座的Neotyphodium属物种，它与无性系的拂子茅（Calamagrostis epigeios (L.) Roth）共生。草上的子座长47.5 - 186毫米，经常出现，但未观察到子囊壳和成熟的子囊。从有症状和无症状的分蘖中获得的真菌分离物的形态彼此相同，且与Epichloe内生菌相似。在系统发育分析中，根据β - 微管蛋白基因（tubB）内含子和翻译延伸因子1 - α基因（tefA）内含子的序列，所有选定的5种真菌分离物聚类成一个明显不同的分支，自展值为99%，支持建立一个新物种。鉴于在寄主植物上产生极长的子座且无有性孢子，我们提议将其命名为Neotyphodium stromatolongrum Y. Ji，L. Zhan et Z. Wang，新种。
We describe a new stromata-producing Neotyphodium species Symbiotic With clonal Calamagrostis epigeios (L.) Roth. Stromata on the grass, 47.5-186 mm long, Occurred frequently, but neither perithecium nor mature ascus was observed. Morphology of fungal isolates obtained from symptomatic and asymptomatic tillers were identical to each other and similar to those of epichloe endophytes. In phylogenetic analysis all selected five fungal isolates clustered into a significantly distinct clade based on sequences of beta-tubulin gene (tubB) introns and translation elongation factor 1-alpha gene (tefA) introns with bootstrap values of 99%, supporting erection of a new species. Concerning the production of extremely long stromata on the host plants and absence of sexual spores, we propose the name Neotyphodium stromatolongrum Y.Ji, L. Zhan et Z. Wang, sp. nov.