Novel Endophytic Pseudescherichia sp. GSE25 Strain Significantly Controls Fusarium graminearum and Reduces Deoxynivalenol in Wheat

文献类型： 外文期刊

第一作者： Gao, Meiling

作者： Gao, Meiling;Gao, Meiling;Song, Minggui;Xu, Yiqian;Sun, Daiyuan;Abdallah, Mohamed F.;Abdallah, Mohamed F.;Lu, Ping;Wang, Jianhua

作者机构：

关键词： wheat; Pseudescherichia sp.; fusarium heading blight; deoxynivalenol; Fusarium graminearum; biocontrol

期刊名称：TOXINS （ 影响因子：4.2； 五年影响因子：4.7 ）

ISSN：

年卷期： 2023 年 15 卷 12 期

页码：

收录情况： SCI

摘要： Fusarium heading blight (FHB) is a devastating disease in wheat, primarily caused by field invasion of Fusarium graminearum. Due to the scarcity of resistant wheat varieties, the agricultural sector resorts to chemical fungicides to control FHB incidence. On the other hand, biocontrol represents a promising, eco-friendly approach aligned with sustainable and green agriculture concepts. In the present study, a bacterial endophyte, Pseudescherichia sp. (GSE25), was isolated from wheat seeds and identified through complete genome sequencing and phylogenetic analysis. In vitro testing of this endophytic strain demonstrated strong antifungal activity against F. graminearum PH-1 by inhibiting spore germination, suppressing germ tube growth, and causing cell membrane damage. Under field conditions, the strain GSE25 significantly reduced the FHB incidence and the associated deoxynivalenol mycotoxin accumulation by over 60% and 80%, respectively. These findings highlight the potential of the isolated bacterial endophyte Pseudescherichia sp. GSE25 strain as a biocontrol agent in protecting wheat from FHB-caused F. graminearum. This is the first report showing a biocontrol effect of Pseudescherichia sp. a strain against phytopathogens.

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