Overexpression of the peroxidase gene ZmPRX1 increases maize seedling drought tolerance by promoting root development and lignification  

作　　者：Xiuzhen Zhai Xiaocui Yan Tinashe Zenda Nan Wang Anyi Dong Qian Yang Yuan Zhong Yue Xing Huijun Duan 

机构地区：[1]State Key Laboratory of North China Crop Improvement and Regulation Key Laboratory of Crop Germplasm Resources in North China,Ministry of Education,College of Agronomy,Hebei Agricultural University,Baoding 071001,Hebei,China

出　　处：《The Crop Journal》2024年第3期753-765,共13页作物学报（英文版）

基　　金：supported by the State Key Laboratory of North China Crop Improvement and Regulation(NCCIR2022ZZ-4);the Key Research and Development Projects of Hebei Province(21326319D)。

摘　　要：Drought is a main abiotic stress factor hindering plant growth,development,and crop productivity.Therefore,it is crucial to understand the mechanisms by which plants cope with drought stress.Here,the function of the maize peroxidase gene ZmPRX1 in drought stress tolerance was investigated by measurement of its expression in response to drought treatment both in a ZmPRX1 overexpression line and a mutant line.The higher root lignin accumulation and seedling survival rate of the overexpression line than that of the wild type or mutant support a role for ZmPRX1 in maize drought tolerance by regulating root development and lignification.Additionally,yeast one-hybrid,Dule luciferase and ChIP-qPCR assays showed that ZmPRX1 is negatively regulated by a nuclear-localized ZmWRKY86 transcription factor.The gene could potentially be used for breeding of drought-tolerant cultivars.

关 键 词：Drought tolerance MAIZE ZmPRX1 Root development Lignin biosynthesis 

分 类 号：S513[农业科学—作物学]