Multilocus phylogenetic analysis of Talaromyces species isolated from cucurbit plants in China and description of two new species, T. cucurbitiradicus and T. endophyticus

文献类型： 外文期刊

第一作者： Su, Lei

作者： Su, Lei;Niu, Yong-Chun

作者机构：

关键词： Cucurbitaceae; fungal endophyte; polymorphism analysis; systematics; 2 new taxa

期刊名称：MYCOLOGIA （ 影响因子：2.696； 五年影响因子：3.089 ）

ISSN： 0027-5514

年卷期： 2018 年 110 卷 2 期

页码：

收录情况： SCI

摘要： During a survey of endophytic fungi from cucurbit plants in China, 21 Talaromyces strains were isolated from ten symptomless plants. Phylogenetic analysis of the partial RNA polymerase II largest subunit gene (RPB2) showed that the strains belong to Talaromyces sections Talaromyces and Islandici. Based on morphological characters and multilocus phylogenetic analysis of the nuc rDNA internal transcribed spacer region (ITS1-5.8S-ITS2 = ITS), calmodulin (CaM), and beta-tubulin (TUB) genes, the strains were identified as four known species, T. cnidii, T. pinophilus, T. radicus, and T. wortmannii, and two new species. Two new species, T. cucurbitiradicus from pumpkin roots and T. endophyticus from cucumber stems, are described in this study. Talaromyces cucurbitiradicus is morphologically similar to T. funiculosus but differs in the number of phialides per metula and by the production of chlamydospores. Talaromyces endophyticus is morphologically similar to T. cerinus and T. chlamydosporus but differs by producing yellowish colonies and by lacking chlamydospores. Further analyses of polymorphisms in ITS and TUB sequences supported the distinctions among T. cucurbitiradicus, T. endophyticus, and similar species.

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