Rice ferredoxin OsFd4 contributes to oxidative stress tolerance but compromises defense against blight bacteria  

作　　者：Minfeng Lu Jinhui Chen Han Meng Guangling Mo Yunhong Liu Fengping Chen Zonghua Wang Mo Wang 

机构地区：[1]Fujian Universities Key Laboratory for Plant-Microbe Interaction,Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops,College of Life Science,Fujian Agriculture and Forestry University, Fuzhou 350002,Fujian,China [2]Fujian Key Laboratory of Plant Virology,Institute of Plant Virology,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China [3]Fuzhou Institute of Oceanography,Minjiang University,Fuzhou 350108,Fujian,China [4]State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan,Yunnan Agricultural University,Kunming 650201,Yunnan,China

出　　处：《The Crop Journal》2023年第6期1937-1942,共6页作物学报（英文版）

基　　金：the National Natural Science Foundation of China(31701777);the National Natural Science Foundation for International Exchanges(NSFC-RS)(31911530181);the Fujian Provincial Science and Technology Key Project(2022NZ030014);Key Plant Protection Disciplinary Development Project(Fujian Agriculture and Forestry University,103-722022001)to Mo Wang.

摘　　要：Ferredoxins(Fds)in plastids are the most upstream stromal electron receptors shuttling electrons to downstream metabolic systems and function in various physiological processes of dicots,but their roles in monocots’response to stresses are still unclear.In this study,the functions of OsFd4,the major non-photosynthetic type Fd in rice,were characterized under oxidative stress and Xanthomonas oryzae pv.oryzae(Xoo)infection.OsFd4-knockout mutants displayed no defects in key agronomic traits and blast resistance,but were more sensitive to hydrogen peroxide(H2O2)treatment than the wild type.Transient expression of OsFd4 alleviated H2O2-induced rice cell death,suggesting that OsFd4 contributes to rice tolerance to exogenous oxidative stress.Deletion of OsFd4 enhanced rice immune responses against Xoo.OsFd4 formed a complex in vivo with itself and OsFd1,the major photosynthetic Fd in rice,and OsFd1 transcripts were increased in leaf and root tissues of the OsFd4-knockout mutants.These results indicate that OsFd4 is involved in regulating rice defense against stresses and interplays with OsFd1.

关 键 词：FERREDOXIN RICE OsFd4 Oxidative stress Blight bacteria 

分 类 号：S511[农业科学—作物学]