Mycosystema
菌 物 学 报 15 November 2008, 27(6): 841-851
ISSN1672-6472 CN11-5180Q
2008 Institute of Microbiology, CAS, all rights reserved.
内蒙古中东部草原羽茅内生真菌的分类
王银华 任安芝 魏宇昆 张欣 谢凤行 林枫 高玉葆*
南开大学生命科学学院 天津 300071
摘 要：从内蒙古中东部草原7个不同地理种群的羽茅Achnatherum sibiricum中分离、培养得到484株内生真菌，根据其形态学特征进行了分类学鉴定。结果表明，其中大部分菌株属于Neotyphodium内生真菌，并发现有少量Neotyphodium有性型Epichloё菌株存在。通过与已发表模式菌株的比较，鉴定其中两个种为N. chisosum和N. huerfanum。N. chisosum为羽茅内生真菌的优势种，而N. huerfanum是首次在羽茅中被发现。对其余暂未能确定种的菌株的菌落和显微形态特征进行了详细描述。不同地理种群羽茅内生真菌的分离率有自东向西增加的趋势，而内生真菌的形态多样性有自东向西减少的趋势。
关键词：Neotyphodium，Epichloё，形态多样性，菌种鉴定
Endophytic fungi from Achnatherum sibiricum (L.) Keng in mid-eastern Inner Mongolia steppe
WANG Yin-Hua REN An-Zhi WEI Yu-Kun ZHANG Xin XIE Feng-Xing
LIN Feng GAO Yu-Bao*
College of Life Sciences, Nankai University, Tianjin 300071, China
Abstract: A total of 484 endophytic fungal isolates were obtained and purified from 7 different geographic populations of Achnatherum sibiricum. Two species of endophytic Neotyphodium were identified. They were N. chisosum and N. huerfanum. The former exists in all of the geographic populations of Achnatherum sibiricum and become a dominant endophytic fungal species, and the latter has not been reported previously in A. sibiricum. Morphological characteristics of the unidentified isolates were described in detail. The isolation rate of endophytic fungi in A. sibiricum showed an ascending trend from the east to the west, while the morphological diversity of the fungi showed a trend of ascendant from the west to the east.
Key words: Neotyphodium, Epichloё, morphological diversity, identification
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