Attenuation of ethylene signaling increases cotton resistance to a defoliating strain of Verticillium dahliae  

作　　者：Tianyi Wang Muhammad Shaban Junhui Shi Weiran Wang Shiming Liu Xinhui Nie Yu Yu Jie Kong Steven J.Klosterman Xianlong Zhang Alifu Aierxi Longfu Zhu 

机构地区：[1]National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University,Wuhan 430070,Hubei,China [2]Department of Plant Breeding and Genetics,University of Agricu [3]Institute of Economic Crops,Xinjiang Academy of Agricultural Sciences,Kuqa 842000,Xinjiang,China [4]Key Laboratory of Oasis Eco-agriculture of the Xinjiang Production and Construction Crops,College of Agronomy,Shihezi University,Shihezi 832000,Xinjiang,China [5]Xinjiang Academy of Agricultural&Reclamation Sciences,Shihezi 832000,Xinjiang,China [6]United States Department of Agriculture,Agricultural Research Service,Salinas,CA 93905,USA

出　　处：《The Crop Journal》2023年第1期89-98,共10页作物学报（英文版）

基　　金：supported by the National Key Research and Development Project of China (2018YFD0100403);the National Natural Science Foundation of China (U1703231)。

摘　　要：The severity of Verticillium wilt on cotton caused by defoliating strains of Verticillium dahliae has gradually increased and threatens production worldwide. Identification of the molecular components of leaf defoliation may increase cotton tolerance to V. dahliae. Ethylene, a major player in plant physiological processes, is often associated with senescence and defoliation of plants. We investigated the cotton–V.dahliae interaction with a focus on the role of ethylene in defoliation and defense against V. dahliae.Cotton plants inoculated with V. dahliae isolate V991, a defoliating strain, accumulated more ethylene and showed increased disease symptoms than those inoculated with a non-defoliating strain. In cotton with a transiently silenced ethylene synthesis gene(GhACOs) and signaling gene(GhEINs) during cotton–V. dahliae interaction, ethylene produced was derived from cotton and more ethylene increased cotton susceptibility and defoliation rate. Overexpression of AtCTR1, a negative regulator in ethylene signaling, in cotton reduced sensitivity to ethylene and increased plant resistance to V. dahliae.Collectively, the results indicated precise regulation of ethylene synthesis or signaling pathways improve cotton resistant to Verticillium wilt.

关 键 词：COTTON Verticillium dahilae ETHYLENE DEFOLIATION 

分 类 号：S435.621.2[农业科学—农业昆虫与害虫防治]