FocVel1 influences asexual production, filamentous growth, biofilm formation, and virulence in Fusarium oxysporum f. sp cucumerinum

文献类型： 外文期刊

第一作者： Li, Peidian

作者： Li, Peidian;Pu, Xiaoming;Yang, Qiyun;Shen, Huifang;Zhang, Jingxin;Lin, Birun;Li, Peidian;Feng, Baozhen;Li, Peidian

作者机构：

关键词： Fusarium oxysporum f. sp cucumerinum;velvet protein;adherence;biofilm;virulence

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2015 年 6 卷

页码：

收录情况： SCI

摘要： Velvet genes play critical roles in the regulation of diverse cellular processes. In current study, we identified the gene FocVel1, a homolog of Fusarium graminearum VelA, in the plant pathogenic fungus F oxysporum f. sp. cucumerinum. This pathogen causes the destructive disease called cucumber Fusarium wilt (CFW), which severely affects the production and marketing of this vegetable worldwide. Transcript analyses revealed high expression of FocVel1 during conidiophore development. Disruption of the FocVell gene led to several phenotypic defects, including reduction in aerial hyphal formation and conidial production. The deletion mutant Delta FocVel1 showed increased resistance to both osmotic stress and cell wall-damaging agents, but increased sensitivity to iprodione and prochloraz fungicides, which may be related to changes in cell wall components. In the process of biofilm formation in vitro, the mutant strain Delta FocVel1 displayed not only a reduction in spore aggregation but also a delay in conidial germination on the polystyrene surface, which may result in defects in biofilm formation. Moreover, pathogenicity assays showed that the mutant Delta FocVel1 exhibited impaired virulence in cucumber seedlings. And the genetic complementation of the mutant with the wild-type FocVel1 gene restored all the defects of the Delta FocVel1. Taken together, the results of this study indicated that FocVel1 played a critical role in the regulation of various cellular processes and pathogenicity in F oxysporum f. sp. cucumerinum.

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