Loss of glucosylceramide synthase impairs the growth and virulence of Fusarium oxysporum f. sp. cubense
文献类型： 外文期刊
作者： Wang, Jian 1 ; Zhang, Kun 1 ; Huang, Li-Qun 1 ; Bao, He-Nan 1 ; Hai, Na 1 ; Yang, Yu-Bing 1 ; Liu, Si-Wen 5 ; Li, Chun-Yu 5 ; Yao, Nan 1 ;
作者机构： 1.Sun Yat Sen Univ, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China
2.Sun Yat Sen Univ, Guangdong Prov Key Lab Plant Resource, Guangzhou 510275, Peoples R China
3.Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Peoples R China
4.Sun Yat Sen Univ, Sch Agr, Shenzhen 518107, Peoples R China
5.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr,Key Lab Trop & Subtrop Fruit Tree Res, Guangzhou 510640, Peoples R China
关键词： Fusarium oxysporum f; sp; cubense tropical race 4; Glucosylceramide; Sphingolipid; Virulence; Conidiation; Cell wall integrity
期刊名称：PHYTOPATHOLOGY RESEARCH （ 影响因子：3.955； 五年影响因子：3.955 ）
ISSN： 2096-5362
年卷期： 2022 年 4 卷 1 期
页码：
收录情况： SCI
摘要： Glucosylceramides are a class of membrane lipids that serve as vital structural and signaling molecules in eukaryotes. In this study, we explored the function of FocGCS, a glucosylceramide synthase (GCS) in Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) that causes Fusarium wilt in banana plants. FocGCS is highly expressed in germinating conidia and during early infection stage of Foc TR4. Disruption of FocGCS resulted in severely retarded vegetative growth, reduced conidiation, and production of morphologically abnormal conidia. Sphingolipid profiling revealed that the FocGCS null mutant lacks glucosylceramide. Pathogenicity assays on banana plants revealed substantial loss of virulence in the FocGCS null mutant. Moreover, biochemical analyses indicated that FocGCS is involved in cell wall integrity but is not required for oxidative and osmotic stress tolerance in Foc TR4. Transcriptome analysis suggested that disruption of FocGCS strongly affects transmembrane transport in Foc TR4. Our findings show that GCS is essential for normal fungal growth and pathogenesis in Foc TR4.
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