Identifying a Sporocarp-inhabiting Fungus Isaria farinosa and Analyzing Its Molecula Phylogeny of ITS SequenceChinese Full Text
DAI Yong-dong;YU Hong;YANG Kun;Yunnan Herbal Laboratory,Institute of Herb Biotic Resources,Yunnan University;
Abstract: A fungi strain（ No. YHIFXS-I001） was isolated from the stroma of Cordyceps militaris collected in Xishan Mountains,Kunming,Yunnan. The morphological and microscopic features were observed. It was showon that the strain had 2types of conidiophore,i. e.,long conical,base enlargement and tip tapering stems. And long chain link type and single spore conidium were discovered. It was benefit for understanding the parasitic styles and microscopic features of Isaria spp. In addition,the ITS sequences of this strain was determined,comparing to the other ITS sequences in GenBank. It was clarified that nine ITS sequences were mistaken an identification as Isaria farinosa. The rest was found to be lower genetic richness（ Hd = 0. 590,P i=0. 003 78） in Isaria farinosa. By analyzing molecular phylogeny of ITS sequences,Isaria spp. were divided into three branchs,not being monophyly. It was polyphylic for the relationships between Isaria farinosa and the other species of Isaria. The results showed that there were polyphylic structures in the genus Isaria. It was implied to be need systematic research of Isaria further.
Keywords：
Sporocarp-inhabiting; Isaria farinosa; Cordyceps militaris; Molecular identification; ITS sequence;
- DOI：
10.13629/j.cnki.53-1054.2013.05.004
- Series：
- Subject：
- Classification Code：
S476.12;S567.39
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