Heterologous expression of the ThIPK2 gene enhances drought resistance of common wheat  

作　　者：ZHANG Shu-juan LI Yu-lian SONG Guo-qi GAO Jie ZHANG Rong-zhi LI Wei CHEN Ming-li LI Gen-ying 

机构地区：[1]Crop Research Institute,Shandong Academy of Agricultural Sciences/Key Laboratory of Wheat Biology and Genetic Improvement on North Yellow and Huai River Valley,Ministry of Agriculture/National Engineering Laboratory for Wheat and Maize,Jinan 250100,P.R.China

出　　处：《Journal of Integrative Agriculture》2020年第4期941-952,共12页农业科学学报（英文版）

基　　金：supported by the Youth Foundation of Shandong Academy of Agricultural Science,China(2016YQN01);the National Science and Technology Major Project of the Ministry of Agriculture of China(2018ZX08009-10B);the National Natural Science Foundation of China(31601301,31501312,31401378);the Natural Science Foundation of Shandong Province,China(ZR2014CM006);the Youth Foundation of Crop Research Institute,Shandong Academy of Agricultural Sciences,China(3201-04);the Key Research and Development Plan of Shandong Province,China(2017GNC10113)。

摘　　要：Th IPK2 is an inositol polyphosphate kinase gene cloned from Thellungiella halophila that participates in diverse cellular processes. Drought is a major limiting factor in wheat(Triticum aestivum L.) production. The present study investigated whether the application of the Th IPK2 gene could increase the drought resistance of transgenic wheat. The codon-optimized Th IPK2 gene was transferred into common wheat through Agrobacterium-mediated transformation driven by either a constitutive maize ubiquitin promoter or a stress-inducible rd29 A promoter from Arabidopsis. Molecular characterization confirmed the presence of the foreign gene in the transformed plants. The transgenic expression of Th IPK2 in wheat led to significantly improve drought tolerance compared to that observed in control plants. Compared to the wild type(WT) plants, the transgenic plants showed higher seed germination rates, better developed root systems, a higher relative water content(RWC) and total soluble sugar content, and less cell membrane damage under drought stress conditions. The expression profiles showed different expression patterns with the use of different promoters. The codon-optimized Th IPK2 gene is a candidate gene to enhance wheat drought stress tolerance by genetic engineering.Th IPK2 is an inositol polyphosphate kinase gene cloned from Thellungiella halophila that participates in diverse cellular processes. Drought is a major limiting factor in wheat(Triticum aestivum L.) production. The present study investigated whether the application of the Th IPK2 gene could increase the drought resistance of transgenic wheat. The codon-optimized Th IPK2 gene was transferred into common wheat through Agrobacterium-mediated transformation driven by either a constitutive maize ubiquitin promoter or a stress-inducible rd29 A promoter from Arabidopsis. Molecular characterization confirmed the presence of the foreign gene in the transformed plants. The transgenic expression of Th IPK2 in wheat led to significantly improve drought tolerance compared to that observed in control plants. Compared to the wild type(WT) plants, the transgenic plants showed higher seed germination rates, better developed root systems, a higher relative water content(RWC) and total soluble sugar content, and less cell membrane damage under drought stress conditions. The expression profiles showed different expression patterns with the use of different promoters. The codon-optimized Th IPK2 gene is a candidate gene to enhance wheat drought stress tolerance by genetic engineering.

关 键 词：codon-optimized DROUGHT RD29A ThIPK2 TRITICUM AESTIVUM L. 

分 类 号：S512.1[农业科学—作物学]