TaPPR13, a Pentatricopeptide Repeat Protein Gene Activated by TaBZR2, Confers Drought Stress Tolerance by Enhancing the Antioxidant Defense System and Promoting Retrograde Signaling in Wheat (Triticum aestivum)
文献类型： 外文期刊
作者： Hou, Ze-Hao 1 ; Zheng, Wei-Jun 2 ; Zheng, Lei 1 ; Wang, Jing-Yue 1 ; Zhang, Shuang-Xi 3 ; Wei, Ji-Tong 1 ; Yang, Shu-Hui 1 ; Jiao, Yuan-Chen 1 ; Cheng, Wen-Jing 1 ; Yu, Tai-Fei 1 ; Ma, Xiao-Fei 4 ; Ru, Jing-Na 4 ; Liu, Yong-Wei 5 ; Cao, Xin-You 6 ; Chen, Jun 1 ; Zhou, Yong-Bin 1 ; Chen, Ming 1 ; Li, Li-Hui 1 ; Ma, You-Zhi 1 ; Nie, Xiao-Jun 2 ; Xu, Zhao-Shi 1 ;
作者机构： 1.Chinese Acad Agr Sci CAAS, Inst Crop Sci, State Key Lab Crop Gene Resources & Breeding, Beijing 100081, Peoples R China
2.Northwest Agr & Forestry Univ, Coll Agron, State Key Lab Crop Stress Resistance & High Effici, Yangling 712100, Peoples R China
3.Ningxia Acad Agr & Forestry Sci, Inst Crop Sci, Yongning 750105, Peoples R China
4.Shanxi Agr Univ, Inst Wheat Res, Ind Crop Inst, Taiyuan 030000, Peoples R China
5.Inst Biotechnol & Food Sci, Hebei Acad Agr & Forestry Sci, Hebei Key Lab Drought Alkali Tolerance Wheat, Cangzhou 050051, Peoples R China
6.Shandong Acad Agr Sci, Crop Res Inst, Natl Engn Lab Wheat & Maize, Key Lab Wheat Biol & Genet Improvement, Jinan 250100, Peoples R China
7.Chinese Acad Agr Sci, Natl Nanfan Res Inst Sanya, Seed Ind Lab, Sanya 572024, Peoples R China
关键词： chloroplast; drought tolerance; GWAS; ROS; retrograde signaling
期刊名称：ADVANCED SCIENCE （ 影响因子：14.1； 五年影响因子：15.6 ）
ISSN：
年卷期： 2025 年
页码：
收录情况： SCI
摘要： The wheat (Triticum aestivum) brassinazole-resistant 2 (TaBZR2) gene is identified as significantly associated with drought tolerance by genome-wide association study (GWAS), and a chloroplast pentatricopeptide repeat (PPR) protein gene TaPPR13 functioned as a positive drought stress regulator downstream of TaBZR2. Overexpression of TaPPR13 enhanced the antioxidative defense system, whereas knockdown of TaPPR13 led to the accumulation of reactive oxygen species (ROS) and caused abnormalities in chloroplast thylakoids under drought stress conditions. RNA-seq analysis showed that overexpression of TaPPR13 significantly upregulated the expression of nuclear-encoded genes involved in ROS scavenging and the abscisic acid (ABA) signaling pathway. Furthermore, TaPPR13 interacted with TaAOR1 and TaSIG5 to facilitate detoxification and regulate chloroplast gene expression, thereby enhancing drought tolerance. Overexpression of TaPPR13 and TaAOR1 mediated stomatal closure to reduce water loss, improving photosynthetic capacity and conferring a yield advantage under drought stress. These findings show that TaPPR13 promotes retrograde signaling to alter nuclear gene expression, with the TaBZR2-TaPPR13-TaAOR1/TaSIG5 module representing a novel signaling pathway that likely plays a pivotal role in drought stress response.
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