文献类型： 外文期刊
作者： Liu, Siwen 1 ; Li, Jian 2 ; Zhang, Yong 3 ; Liu, Na 4 ; Viljoen, Altus 5 ; Mostert, Diane 5 ; Zuo, Cunwu 6 ; Hu, Chunhua; 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Minist Agr, Key Lab Trop & Subtrop Fruit Tree Res Guangdong P, Inst Fruit Tree Res,Key Lab South Subtrop Fruit B, Guangzhou 510640, Guangdong, Peoples R China
2.Shenyang Agr Univ, Coll Hort, Shenyang 110866, Liaoning, Peoples R China
3.Zhejiang Univ, Inst Biotechnol, Hangzhou 310058, Zhejiang, Peoples R China
4.Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Guangdong, Peoples R China
5.Univ Massachusetts, Dept Biochem & Mol Biol, Amherst, MA 01003 USA
6.Univ Stellenbosch, Dept Plant Pathol, Private Bag X1, ZA-7602 Matieland, South Africa
关键词： banana; fusaric acid; Fusarium oxysporum f; sp; cubense TR4; reactive oxygen species; virulence
期刊名称：NEW PHYTOLOGIST （ 影响因子：10.151； 五年影响因子：10.475 ）
ISSN： 0028-646X
年卷期： 2020 年 225 卷 2 期
页码：
收录情况： SCI
摘要： Fusaric acid (FSA) is a phytotoxin produced by several Fusarium species and has been associated with plant disease development, although its role is still not well understood. Mutation of key genes in the FSA biosynthetic gene (FUB) cluster in Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) reduced the FSA production, and resulted in decreased disease symptoms and reduced fungal biomass in the host banana plants. When pretreated with FSA, both banana leaves and pseudostems exhibited increased sensitivity to Foc TR4 invasion. Banana embryogenic cell suspensions (ECSs) treated with FSA exhibited a lower rate of O-2 uptake, loss of mitochondrial membrane potential, increased reactive oxygen species (ROS) accumulation, and greater nuclear condensation and cell death. Consistently, transcriptomic analysis of FSA-treated ECSs showed that FSA may induce plant cell death through regulating the expression of genes involved in mitochondrial functions. Te results herein demonstrated that the FSA from Foc TR4 functions as a positive virulence factor and acts at the early stage of the disease development before the appearance of the fungal hyphae in the infected tissues.
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