文献类型： 外文期刊
作者： Fan, Kai 1 ; Wu, Yuchen 1 ; Mao, Zhijun 1 ; Yin, Kan 1 ; He, Yuxi 4 ; Pan, Xinfeng 1 ; Zhu, Xiaxiao 1 ; Liao, Changjian 2 ; Cui, Lili 3 ; Jia, Qi 1 ; Li, Zhaowei 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Minist Educ, Key Lab Genet Breeding & Multiple Utilizat Crops, Coll Agr, Fuzhou 350002, Peoples R China
2.Fujian Acad Agr Sci, Crop Res Inst, Tech Res Ctr Dry Crop Variety Breeding Fujian Prov, Fuzhou 350013, Peoples R China
3.Fujian Acad Agr Sci, Rice Res Inst, Fuzhou 350018, Peoples R China
4.Fujian Agr & Forestry Univ, Coll Agr, Key Lab Biol Breeding Fujian & Taiwan Crops, Minist Agr & Rural Affairs, Fuzhou 350002, Peoples R China
关键词： Maize; Drought stress; NAC transcription factor; ZmNAC55; Molecular mechanism
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.1； 五年影响因子：6.2 ）
ISSN： 0981-9428
年卷期： 2024 年 214 卷
页码：
收录情况： SCI
摘要： Drought stress is a major limit on the maize growth and productivity, and understanding the drought response mechanism is one of the important ways to improve drought resistance in maize. However, more drought-related genes and their regulated mechanisms are still to be reported. Here, we identified a novel NAC transcription factor ZmNAC55 in Zea mays and comprehensively investigated the functions of ZmNAC55 under drought stress. ZmNAC55 belonged to the NAP subfamily. ZmNAC55 had a conserved NAC domain in the N-terminal region and a divergent TAR region in the C-terminal region. ZmNAC55 was a nuclear protein, and ZmNAC55 and its TAR region had the transcriptional activation activity. Furthermore, the expression level of ZmNAC55 in leaves could be highly induced by drought stress. ZmNAC55 overexpression in Arabidopsis conferred the drought-sensitive phenotype with higher water loss, lower survival rate, higher membrane ion leakage, and higher expression levels of some drought-related genes. Meanwhile, ZmNAC55 underexpression in maize enhanced drought tolerance with lower water loss, higher survival rate, lower membrane ion leakage and lower expression levels of some drought-related genes. In addition, ZmNAC55 appeared to be very key in regulating ROS production under drought stress. Moreover, ZmNAC55 could activate ZmHOP3 expression by binding to its promoter. A novel working model of ZmNAC55 under drought stress could be found in maize. Taken together, the NAC transcription factor ZmNAC55 could negatively regulate drought stress via increasing ZmHOP3 expression in maize. ZmNAC55 is a promising candidate for improving drought resistance in maize.
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