数字农科院2.0

Oscul3A-Associated Molecular Switches Have Functions In Cell Metabolism, Cell Death, And Disease Resistance

文献类型： 外文期刊

作者： Gao, ZQ; Liu, QN; Zhang, YX; Daibo, C; Zhan, XD; Deng, CW; Cheng, SH; Cao, LY

作者机构：

关键词： Disease Resistance; Hydrogen Peroxide; Lesion Mimic; Molecular Switch; Cell Metabolism Balance; Grain Quality

期刊名称： JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

ISSN： 0021-8561

年卷期： 2020 年 68 卷 19 期

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： This study applies parallel reaction monitoring (PRM) proteomics and CRISPR-Cas9 mutagenesis to identify relationships between cell metabolism, cell death, and disease resistance. In oscul3a (oscullin3a) mutants, OsCUL3a-associated molecular switches are responsible for disrupted cell metabolism that leads to increased total lipid content in rice grain, a late accumulation of H2O2 in leaves, enhanced Xanthomonas oryzae pv. oryzae disease resistance, and suppressed panicle and first internode growth. In oscul3a mutants, PRM-confirmed upregulated molecular switch proteins include lipoxygenases (CM-LOX1 and CM-LOX2), suggesting a novel connection between ferroptosis and rice lesion mimic formation. Rice immunity-associated proteins OsNPR1 and OsNPR3 were shown to interact with each other and have opposing regulatory effects based on the cell death phenotype of osnpr1/oscul3a and osnpr3/oscul3a double mutants. Together, these results describe a network that regulates plant growth, disease resistance, and grain quality that includes the E3 ligase OsCUL3a, cell metabolism-associated molecular switches, and immunity switches OsNPR1 and OsNPR3.

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