Two new Trichoderma species (Hypocreales, Hypocreaceae) isolated from decaying tubers of Gastrodiaelate.
Two new Trichoderma species (Hypocreales, Hypocreaceae) isolated from decaying tubers of Gastrodiaelate.
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DOI：
10.3897/mycokeys.99.109404
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发表时间：
2023
期刊：
影响因子：
3.3
通讯作者：
Yu Z
中科院分区：
文献类型：
--
作者：
Ye C;Jing T;Sha Y;Mo M;Yu Z
木霉属的种类在世界范围内分布广泛。本文介绍了两个木霉菌新种：白木霉菌和变叶木霉菌。这些种是从中国天麻病块茎中分离得到的，通过形态特征和核糖体DNA内转录间隔区（ITS）、翻译延伸因子1-α编码基因（tef 1-α）和第二大核RNA聚合酶亚基（rpb 2）3个位点的多基因序列分析，鉴定出它们的种属。并对新种与近缘种的区别进行了讨论。系统发育分析结果表明，白毛藓属于Harzianum分支，变叶毛藓属于Spirale分支。这两个分支的扩展为天麻块茎病害的防治提供了研究基础。
Species of Trichoderma are widely distributed around the world. In this study, two new species in Trichoderma, named as T.albidum and T.variegatum, were introduced and illustrated. These species were isolated from diseased tubers of Gastrodiaelata in China and identified based on morphological characteristics and multi-gene sequence analyses of three loci that is the internal transcribed spacer regions of the ribosomal DNA (ITS), the translation elongation factor 1-α encoding gene (tef1-α) and the gene encoding the second largest nuclear RNA polymerase subunit (rpb2). Distinctions between the new species and their close relatives were discussed. According to results of the phylogenetic analyses, T.albidum belonged to the Harzianum clade and T.variegatum are grouped with species of the Spirale clade. The expansion of two clades provided research foundations for the prevention and control of tuber diseases in G.elata.
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