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The Maize WRKY Transcription Factor ZmWRKY40 Confers Drought Resistance in Transgenic Arabidopsis

文献类型： 外文期刊

作者： Wang, Chang-Tao 1 ; Ru, Jing-Na 2 ; Liu, Yong-Wei 3 ; Yang, Jun-Feng 4 ; Li, Meng 1 ; Xu, Zhao-Shi 2 ; Fu, Jin-Dong 2 ;

作者机构： 1.Beijing Technol & Business Univ, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing Key Lab Plant Resource Res & Dev, Beijing 100048, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci,Minist Agr, Natl Key Facil Crop Gene Resources & Genet Improv, Key Lab Biol & Genet Improvement Triticeae Crops, Beijing 100081, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Genet & Physiol, Plant Genet Engn Ctr Hebei Prov, Shijiazhuang 050051, Hebei, Peoples R China

4.Hebei Wangfeng Seed Ind Co Ltd, Xin

关键词： WRKY; abiotic stress; regulatory mechanism; drought tolerance; maize

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2018 年 19 卷 9 期

页码：

收录情况： SCI

摘要： Abiotic stresses restrict the growth and yield of crops. Plants have developed a number of regulatory mechanisms to respond to these stresses. WRKY transcription factors (TFs) are plant-specific transcription factors that play essential roles in multiple plant processes, including abiotic stress response. At present, little information regarding drought-related WRKY genes in maize is available. In this study, we identified a WRKY transcription factor gene from maize, named ZmWRKY40. ZmWRKY40 is a member of WRKY group II, localized in the nucleus of mesophyll protoplasts. Several stress-related transcriptional regulatory elements existed in the promoter region of ZmWRKY40. ZmWRKY40 was induced by drought, high salinity, high temperature, and abscisic acid (ABA). ZmWRKY40 could rapidly respond to drought with peak levels (more than 10-fold) at 1 h after treatment. Overexpression of ZmWRKY40 improved drought tolerance in transgenic Arabidopsis by regulating stress-related genes, and the reactive oxygen species (ROS) content in transgenic lines was reduced by enhancing the activities of peroxide dismutase (POD) and catalase (CAT) under drought stress. According to the results, the present study may provide a candidate gene involved in the drought stress response and a theoretical basis to understand the mechanisms of ZmWRKY40 in response to abiotic stresses in maize.

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