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从泰国清莱府和清迈府收集的三个兰科属(兜兰属、石斛属和杓兰属)的兰花根部分离和鉴定出类似立枯丝核菌的真菌。

Isolation and identification of Rhizoctonia-like fungi from roots of three orchid genera, Paphiopedilum, Dendrobium, and Cymbidium, collected in Chiang Rai and Chiang Mai provinces of Thailand.

机构信息

School of Science, Mah Fah Luang University, 333 Moo 1, Thasud, Muang District, Chiang Rai 57100, Thailand.

出版信息

Mycorrhiza. 2010 Oct;20(7):459-71. doi: 10.1007/s00572-010-0297-3. Epub 2010 Jan 28.

Abstract

Three orchid genera, Paphiopedilum, Cymbidium, and Dendrobium, are among the most heavily traded ornamental plants in Thailand. In this study, 27 isolates of Rhizoctonia-like fungi were isolated from root sections of mature orchids in the three orchid genera, collected from diverse horticultural settings in Chiang Mai and Chiang Rai provinces of Thailand. Fungal identification was done by the morphological characterization, the comparison of the internal transcribed spacer and 5.8S ribosomal DNA sequences, and the phylogenetic analysis. Epulorhiza repens was found to be the most common species found in the roots of various species of all three orchid genera, whereas Epulorhiza calendulina-like isolates were strictly found in the roots of Paphiopedilum species. We have also isolated and described an anamorph of Tulasnella irregularis, four new anamorphic species in the genus Tulasnella, and a new anamorphic species in the family Tulasnellaceae. Our study provides information on diversity of root-associated fungi of the orchid genera and at the sampling sites that were rarely addressed in the previous studies.

摘要

三个杓兰属、兰属和石斛属的兰科植物是泰国交易量最大的观赏植物之一。本研究从泰国清迈和清莱府不同园艺环境中成熟的杓兰属、兰属和石斛属植物的根部分离出 27 株根腐病菌似真菌分离株。真菌鉴定是通过形态特征、内转录间隔区和 5.8S 核糖体 DNA 序列的比较以及系统发育分析进行的。发现 Epulorhiza repens 是三种杓兰属植物根部最常见的物种,而 Epulorhiza calendulina 样分离株则严格存在于杓兰属植物的根部。我们还分离并描述了不规则 Tulasnella 的无性型、Tulasnella 属中的四个新无性型种以及 Tulasnellaceae 科的一个新无性型种。我们的研究提供了有关杓兰属和以前研究很少涉及的采样点的根相关真菌多样性的信息。

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