文献类型： 外文期刊
作者： Zhao, Zhixiong 1 ; Qin, Tao 1 ; Zheng, Hongjian 1 ; Guan, Yuan 1 ; Gu, Wei 1 ; Wang, Hui 1 ; Yu, Diansi 1 ; Qu, Jingtao 1 ; Wei, Jihui 1 ; Xu, Wen 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, Shanghai Engn Res Ctr Specialty Maize, Shanghai Key Lab Agr Genet & Breeding,CIMMYT China, Shanghai 201403, Peoples R China
2.Xinjiang Agr Univ, Coll Agr, Urumqi 830052, Peoples R China
关键词：
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2025 年 14 卷 5 期
页码：
收录情况： SCI
摘要： The DIR (Dirigent) gene family plays a multifaceted role in plant growth, development, and stress responses, making it one of the key gene families for plant adaptation to environmental changes. However, research on ZmDIRs in maize remains limited. In this study, we identified a member of the maize DIR gene family, ZmDIR5, whose promoter region contains numerous elements associated with responses to abiotic stresses. ZmDIR5 is upregulated in response to waterlogging, salt, and drought stresses, and its protein is localized in the endoplasmic reticulum. Subsequent studies revealed that ZmDIR5-EMS (ethyl methane sulfonate) mutant lines exhibited reduced growth compared to WT (wild-type) plants under waterlogging, salt, and drought stress conditions. The mutant lines also demonstrated a relatively higher accumulation of malondialdehyde and reactive oxygen species, lower synthesis of proline and total lignans, and decreased antioxidant enzyme activity under these stress conditions. Additionally, the mutant lines displayed impaired sodium and potassium ion transport capabilities, reduced synthesis of abscisic acid and zeatin, and decreased expression of related genes. The mutation of ZmDIR5 also inhibited the phenylpropanoid biosynthesis pathway in maize. These results indicate that ZmDIR5 serves as a positive regulator of maize tolerance to waterlogging, salt, and drought stresses.
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