Changes in concentrations and transcripts of plant hormones in wheat seedling roots in response to Fusarium crown rot  

作　　者：Yutian Gao Xuejun Tian Weidong Wang Xiangru Xu Yuqing Su Jiatian Yang Shuonan Duan Jinlong Li Mingming Xin Huiru Peng Qixin Sun Chaojie Xie Jun Ma 

机构地区：[1]College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,China [2]Institute of Biotechnology and Food Science,Hebei Academy of Agriculture and Forestry Sciences,Shijiazhuang 050051,Hebei,China

出　　处：《The Crop Journal》2023年第5期1441-1450,共10页作物学报（英文版）

基　　金：supported by the State Key Laboratory of North China Crop Improvement and Regulation;National Key Research and Development Program of China (2018YFD0300501);National Natural Science Foundation of China (31872865)。

摘　　要：Fusarium crown rot(FCR) is a soilborne disease causing severe yield losses in many wheat-growing areas of the world. Diseased plants show browning and necrosis of roots and stems causing white heads at maturity. Little is known about the molecular processes employed by wheat roots to respond to the disease. We characterized morphological, transcriptional and hormonal changes in wheat seedling roots following challenge with Fusarium pseudograminearum(Fp), the main pathogen of FCR. The pathogen inhibited root development to various extents depending on plants' resistance level. Many genes responsive to FCR infection in wheat roots were enriched in plant hormone pathways. The contents of compounds involved in biosynthesis and metabolism of jasmonic acid, salicylic acid, cytokinin and auxin were drastically changed in roots at five days post-inoculation. Presoaking seeds in methyl jasmonate for 24 h promoted FCR resistance, whereas presoaking with cytokinin 6-benzylaminopurine made plants more susceptible. Overexpression of TaOPR3, a gene involved in jasmonic acid biosynthesis, enhanced plant resistance as well as root and shoot growth during infection.

关 键 词：Fusarium crown rot(FCR) Wheat HORMONE ROOT TaOPR3 

分 类 号：S512.1[农业科学—作物学]