A beauvericin hot spot in the genus Isaria

Mycological research Pub Date : 2009-12-01 DOI:10.1016/j.mycres.2009.08.017

J. Jennifer Luangsa-ard , Pitchapa Berkaew , Rungpet Ridkaew , Nigel L. Hywel-Jones , Masahiko Isaka

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引用次数: 47

Abstract

Beauvericin is a naturally occurring cyclohexadepsipeptide originally described from Beauveria bassiana but also reported from several Fusarium species as well as members of the genus Isaria. Twenty-six isolates of Isaria species and its Cordyceps teleomorph, and ten taxonomically close strains including Beauveria, Nomuraea and Paecilomyces species were sequenced and tested for beauvericin production. Trees using ITS rDNA and β-tubulin sequence data were constructed and used to infer the phylogenetic distribution of beauvericin production. A group comprising Isaria tenuipes and its known teleomorph Cordyceps takaomontana, Isaria cicadae and its Cordyceps teleomorph, Isaria japonica and Isaria fumosorosea, showed positive beauvericin production which correlated well with combined ITS rDNA and β-tubulin phylogenies. The results suggested that beauvericin can serve as a chemotaxonomic marker for these limited species of the I. tenuipes complex.

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伊撒利亚属beauvericin的热点

Beauvericin是一种天然存在的环己苷肽，最初从球孢白僵菌中发现，但也从一些镰刀菌和Isaria属的成员中报道。对26株Isaria及其冬虫夏草远形菌和10株分类相近的Beauveria、Nomuraea和Paecilomyces进行了测序和产beauvericin的检测。利用ITS rDNA和β-微管蛋白序列数据构建树，并用于推断beauvericin生产的系统发育分布。一组包括tenuisaria及其已知的远形虫草takaomontana, Isaria cicadae及其远形虫草，Isaria japonica和Isaria fumosorosea，显示出阳性的beauvericin产生，这与its rDNA和β-微管蛋白的组合系统发育密切相关。结果表明，beauvericin可以作为一种化学分类标记物用于这些有限种类的tenuipes复合体。

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Mycological research

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