A new species of Epichloe symbiotic with Chinese grasses

被引：39

作者：

Li, Wei ^{[1
]}

Ji, Yan-Ling ^{[1
]}

Yu, Han-Shou ^{[1
]}

Wang, Zhi-Wei ^{[1
]}

机构：

[1] Nanjing Agr Univ, Coll Life Sci, Dept Microbiol, Nanjing 210095, Peoples R China

来源：

MYCOLOGIA | 2006年 / 98卷 / 04期

关键词：

E; yangzii; host specificity; interfertility tests; morphology; phylogenetic relationship; Roegneria kamoji;

D O I：

10.3852/mycologia.98.4.560

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Epichlo, species are fungal symbionts (endophytes) of grasses, six European and four North American biological species in genus Epichloo have been described in previous researches. In this study we describe a new Epichlo, species, Epichloo yangzii Li et Wang, found in natural symbioses with Roegneria kamoji native to China. We investigated the host specificity, morphology, interfertility tests and molecular phylogenetie evidences of this new species. The results indicated that E. yangzii is host specific and seedborne. Most morphological characteristics of this new species are typical in the genus. However differences are evident in several features including size of perithecia, asci and ascospores. In mating tests E. yangzii was not interfertile with E. elymi isolates from related hosts in genera Elymus. Phylogenetic relationships based on sequences of beta-tubulin gene (tub2) introns and translation elongation factor Ia gene (tefl) introns showed that members of the new species grouped into exclusive clades with high bootstrap value.

引用

页码：560 / 570

页数：11

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