Four new species of Trichoderma in the Harzianum clade from northern China.
Four new species of Trichoderma in the Harzianum clade from northern China.
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DOI：
10.3897/mycokeys.73.51424
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发表时间：
2020
期刊：
影响因子：
3.3
通讯作者：
Sun JZ
中科院分区：
文献类型：
--
作者：
Gu X;Wang R;Sun Q;Wu B;Sun JZ
木霉属的Harzianum分支包括许多物种，这些物种与多种底物相关。本文报道了4个木霉菌新种，即T. lentinulae、香菇T. vermifimicola、T. xixiacum和T. zelobreve，从子实体和香菇，土壤和蚯蚓堆肥的堆肥遇到。描述了它们的菌落和菌丝形态，包括无性状态的特征。从核糖体DNA的内转录间隔区（ITS）、编码第二大核RNA聚合酶亚基的基因（RPB 2）和编码翻译延伸因子1-α的基因（TEF 1-α）3个位点获得了每个种的DNA序列。结合三个基因区的序列分析，区分了木霉哈茨分支中的四个新种。其中T. lentinulae和T. xixiacum与T. lixii，与之不同的是瓶梗较短，分生孢子较小。此外，T. lentinulae与T. xixiacum在形成瓶梗与不等边到强烈弯曲的顶端，文化特征，和PDA上生长缓慢。蠕孢木霉与T. simmonsii，但与后者不同的是产生轮生轮生的瓶梗和较小的分生孢子。Zelobreve木霉是T.短，但区别于T.通过产生更短和更窄的瓶梗、更小的分生孢子以及通过在琼脂平板上形成同心区来缩短。本研究更新了对木霉菌物种多样性的认识。
The Harzianum clade of Trichoderma comprises many species, which are associated with a wide variety of substrates. In this study, four new species of Trichoderma, namely T. lentinulae, T. vermifimicola, T. xixiacum, and T. zelobreve, were encountered from a fruiting body and compost of Lentinula, soil, and vermicompost. Their colony and mycelial morphology, including features of asexual states, were described. For each species, their DNA sequences were obtained from three loci, the internal transcribed spacer (ITS) regions of the ribosomal DNA, the gene encoding the second largest nuclear RNA polymerase subunit (RPB2), the translation elongation factor 1-α encoding gene (TEF1-α). The analysis combining sequences of the three gene regions distinguished four new species in the Harzianum clade of Trichoderma. Among them, T. lentinulae and T. xixiacum clustered with T. lixii, from which these new species differ in having shorter phialides and smaller conidia. Additionally, T. lentinulae differs from T. xixiacum in forming phialides with inequilateral to a strongly-curved apex, cultural characteristics, and slow growth on PDA. Trichoderma vermifimicola is closely related to T. simmonsii, but it differs from the latter by producing phialides in verticillate whorls and smaller conidia. Trichoderma zelobreve is the sister species of T. breve but is distinguished from T. breve by producing shorter and narrower phialides, smaller conidia, and by forming concentric zones on agar plates. This study updates our knowledge of species diversity of Trichoderma.
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