Notes on the genus Leveillula (Erysiphaceae): a new unrecorded species and notes on Leveillula infecting Ficus, Cucurbita and Tropaeolum in Iran
Notes on the genus Leveillula (Erysiphaceae): a new unrecorded species and notes on Leveillula infecting Ficus, Cucurbita and Tropaeolum in Iran
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关于 Leveillula 属（白粉菌科）的注释：一种未记录的新物种以及关于感染伊朗榕树、葫芦和 Tropaeolum 的 Leveillula 的注释
DOI：
10.11646/phytotaxa.260.3.6
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发表时间：
2016
期刊：
影响因子：
1.1
通讯作者：
Jahani M
中科院分区：
文献类型：
--
作者：
Khodaparast SA;Takamatsu S;Shadlou A;Damadi M;Pirnia M;Jahani M
摘要白粉病属的分类一直被认为是白粉病分类学的一个挑战。在过去的十年中，rDNA多样性已被用于水蛭属的系统发育分析，旨在更好地了解水蛭属的遗传多样性和分类。伊朗干旱和温暖的气候提供了一个高水平的白粉病的多样性与广泛的寄主植物。在这项研究中，我们从四个样本中获得了额外的rDNA ItS序列，这些序列在ItS rDNA区域上显示出更多的多样性。根据我们的观察，大对流层蝗的形态与该寄主物种上的对流层蝗不同。无花果上的水平菌可能与收缩菌有亲缘关系。葫芦上的真菌在形态上不同于L. taurica， L. taurica是一种常见的真菌，已在广泛的作物和葫芦科中记录。为了确定系统发育关系和促进物种鉴定，对rDNA的ItS区域进行了测序。葫芦白粉病rDNA ItS序列与白粉病L. thevenotiae同源性100%。无花果上的水平叶柄与收缩叶柄丛生。首次生成了白僵菌的ItS序列。结果表明，该菌株与牛头乳酸菌在牛头乳酸菌纯型寄主fabago上的亲缘关系较近，但在5个位置上存在差异。
Abstract taxonomy of the genus Leveillula has long been considered as a challenge in powdery mildew systematics. During the last decade the rDNA diversity has been used for phylogenetic analysis of the genus Leveillula aiming for better understanding of the genetic diversity and taxonomy of the genus. Iran with an arid and warm climate provides a high Leveillula powdery mildew diversity associated with a wide range of host plants. In this study we have obtained additional rDNA ItS sequences from four samples which show more diversity on ItS rDNA region. According to our observation morphology of Leveillula on Tropaeolum majus is different from what described as L. tropaeolicola on this host species. Leveillula on Ficus carica could be closely related to L. contractirostris. the fungus on Cucurbita is morphologically different from L. taurica, a common species that has been recorded on a wide range of crops as well as Cucurbitaceae. to determine phylogenetic relationships and to facilitate species identification, ItS regions of rDNA were sequenced for new collections. Sequence of rDNA ItS from Cucurbita powdery mildew showed 100% identity to those of L. thevenotiae. Leveillula on Ficus carica clustered with L. contractirostris. ItS sequences of L. jaczewskii was generated for the first time. these data showed that L. jaczewskii is closely related to L. taurica on Zygophyllum fabago (holotype host for L. taurica), however, the two DNA sequences differ at five positions.