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ZmDRZ1 negatively regulates drought tolerance via modulating ABA signaling pathway in maize

文献类型： 外文期刊

作者： Zhifeng Chen;Yuhang Guo;Xiaodong Wang;Jian Li;Rui Li;Yang Qin;Yiru Wang;Jun Zheng

作者机构：

关键词： Abscisic acid (ABA);Drought tolerance;Maize;Stomata;ZmDRZ1

期刊名称： Plant Cell Reports

ISSN： 0721-7714

年卷期： 2026 年 45 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Key message: ZmDRZ1 serves as a negative regulator of drought tolerance in maize seedlings by modulating stomatal closure through an ABA-dependent signaling pathway. Abstract: Drought is one of the major risk factors for maize (Zea mays L.) yield. Some genes controling drought resistance have been cloned, but the role of drought resistance is still not clear in maize. The RING (Really Interesting New Gene) domain-containing protein family plays critical role in abscisic acid (ABA) signaling pathways that orchestrate plant responses to abiotic stress. Here, we characterized the RING protein family of maize and identified a novel RING-v gene, designated drought-related RING Zinc finger 1 (ZmDRZ1). Tissue-specific expression analysis indicated that ZmDRZ1 expression was significantly down-regulated in maize seedlings under drought conditions. CRISPR/Cas9-mediated knockout of ZmDRZ1 enhanced drought resistance by increasing ABA content, promoting stomatal closure, and improving photosynthetic performance. Conversely, ZmDRZ1- overexpression (OE) lines exhibited reduced relative water content, elevated levels of malondialdehyde (MDA) and hydrogen peroxide (H2O2), and increased sensitivity to drought stress. Further investigation showed that ZmDRZ1 regulates key ABA-related drought resistance genes, including ZmPP2C80, ZmPP2C30, and ZmCYP707As, which are involved in ABA signal transduction and degradation, respectively. In conclusion, our findings indicate that ZmDRZ1 modulates drought resistance in maize through an ABA-dependent pathway. These findings provide insights for further elucidating the ZmDRZ1-mediated mechanisms underlying drought responses in maize.

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