Streptomyces botrytidirepellens sp. nov., a novel actinomycete with antifungal activity against Botrytis cinerea

文献类型： 外文期刊

第一作者： Jiang, Mengqi

作者： Jiang, Mengqi;Xu, Xi;Song, Jia;Li, Dongmei;Han, Liyuan;Sun, Xiujun;Guo, Lifeng;Xiang, Wensheng;Zhao, Junwei;Wang, Xiangjing;Xiang, Wensheng

作者机构：

关键词： Botrytis cinerea; grey mould; genomic properties; polyphasic approach; Streptomyces botrytidirepellens sp. nov.

期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.689； 五年影响因子：2.925 ）

ISSN： 1466-5026

年卷期： 2021 年 71 卷 9 期

页码：

收录情况： SCI

摘要： The fungal pathogen Botrytis cinerea is the causal agent of devastating gray mold diseases in many economically important fruits, vegetables, and flowers, leading to serious economic losses worldwide. In this study, a novel actinomycete NEAU- LD23(T) exhibiting antifungal activity against B. cinerea was isolated, and its taxonomic position was evaluated using a polyphasic approach. Based on the genotypic, phenotypic and chemotaxonomic data, it is concluded that the strain represents a novel species within the genus Streptomyces, for which the name Streptomyces botrytidirepellens sp. nov. is proposed. The type strain is NEAU-LD23(T) (=CCTCC AA 2019029(T)=DSM 109824(T)). In addition, strain NEAU- LD23(T) showed a strong antagonistic effect against B. cinerea (82.6 +/- 2.5%) and varying degrees of inhibition on nine other phytopathogenic fungi. Both cell-free filtrate and methanol extract of mycelia of strain NEAU- LD23(T) significantly inhibited mycelial growth of B. cinerea. To preliminarily explore the antifungal mechanisms, the genome of strain NEAU- LD23(T) was sequenced and analyzed. AntiSMASH analysis led to the identification of several gene clusters responsible for the biosynthesis of bioactive secondary metabolites with antifungal activity, including 9-methylstreptimidone, echosides, anisomycin, coelichelin and desferrioxamine B. Overall, this research provided us an excellent strain with considerable potential to use for biological control of tomato gray mold.

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