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

作物学报：英文版 2023年第1期11卷 89-98页

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 National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina Department of Plant Breeding and Genetics University of Agricu Institute of Economic Crops Xinjiang Academy of Agricultural SciencesKuqa 842000XinjiangChina Key Laboratory of Oasis Eco-agriculture of the Xinjiang Production and Construction Crops College of AgronomyShihezi UniversityShihezi 832000XinjiangChina Xinjiang Academy of Agricultural&Reclamation Sciences Shihezi 832000XinjiangChina United States Department of Agriculture Agricultural Research ServiceSalinasCA 93905USA

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–*** interaction with a focus on the role of ethylene in defoliation and defense against V. *** 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. ***, 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

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