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

• 全文链接

乙烯信号减弱提高棉花对一株落叶型棉花黄萎病的抗性

关键词：

来源：

CROP JOURNAL

全文链接：

//agri.nais.net.cn/topic/downloadFile/f96ff67c-dcd2-44dc-b6b4-1d265fa9fb82

来源地址：

https://www.sciencedirect.com/science/article/pii/S2214514122001283?via%3Dihub

资源所属：

棉花遗传育种

类型：

学术文献

语种：

英语

原文发布日期：

2023-02-01

摘要：

The severity of Verticillium wilt on cotton caused by defoliating strains of Verticillium dahliae has gradu-ally 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 cot-ton-V. dahliae interaction, ethylene produced was derived from cotton and more ethylene increased cot-ton 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.