数字农科院2.0

ZmSIZ1a and ZmSIZ1b play an indispensable role in resistance against Fusarium ear rot in maize

文献类型： 外文期刊

作者： Liao, Xinyang;Sun, Juan;Li, Quanquan;Ding, Wenyan;Zhao, Binbin;Wang, Baobao;Zhou, Shaoqun;Wang, Haiyang

作者机构：

关键词： flavonoid;Fusarium ear rot (FER);maize (Zea mays);SUMO E3 ligase;ZmSIZ1a;1b

期刊名称： MOLECULAR PLANT PATHOLOGY

ISSN： 1464-6722

年卷期： 2023 年

页码：

收录情况： SCIE（2023版）

摘要： Fusarium ear rot (FER) is a destructive fungal disease of maize caused by Fusarium verticillioides. FER resistance is a typical complex quantitative trait controlled by micro-effect genes, leading to difficulty in identifying the host resistance genes. SIZ1 encodes a SUMO E3 ligase regulating a wide range of plant developmental processes and stress responses. However, the function of ZmSIZ1 remains poorly understood. In this study, we demonstrate that ZmSIZ1a and ZmSIZ1b possess SUMO E3 ligase activity, and that the Zmsiz1a/1b double mutant, but not the Zmsiz1a or Zmsiz1b single mutants, exhibits severely impaired resistance to FER. Transcriptome analysis showed that differentially expressed genes were significantly enriched in plant disease resistance-related pathways, especially in plant-pathogen interaction, MAPK signalling, and plant hormone signal transduction. Thirty-five candidate genes were identified in these pathways. Furthermore, the integration of the transcriptome and metabolome data revealed that the flavonoid biosynthesis pathway was induced by F. verticillioides infection, and that accumulation of flavone and flavonol was significantly reduced in the Zmsiz1a/1b double mutant. Collectively, our findings demonstrate that ZmSIZ1a and ZmSIZ1b play a redundant, but indispensable role against FER, and provide potential new gene resources for molecular breeding of FER-resistant maize cultivars.

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