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Multiomic analyses reveal key sectors of jasmonate-mediated defense responses in rice

文献类型： 外文期刊

作者： Chen, Yumeng 1 ; Jin, Gaochen 1 ; Liu, Mengyu 1 ; Wang, Lanlan 2 ; Lou, Yonggen 1 ; Baldwin, Ian 3 ; Li, Ran 1 ;

作者机构： 1.Zhejiang Univ, Inst Insect Sci, State Key Lab Rice Biol & Breeding, Key Lab Biol Crop Pathogens & Insects Zhejiang Pro, Hangzhou 310058, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, Hangzhou 310021, Peoples R China

3.Max Planck Inst Chem Ecol, Dept Mol Ecol, 07745 Jena, Germany

期刊名称：PLANT CELL （ 影响因子：10.0； 五年影响因子：11.1 ）

ISSN： 1040-4651

年卷期： 2024 年

页码：

收录情况： SCI

摘要： The phytohormone jasmonate (JA) plays a central role in plant defenses against biotic stressors. However, our knowledge of the JA signaling pathway in rice (Oryza sativa) remains incomplete. Here, we integrated multiomic data from three tissues to characterize the functional modules involved in organizing JA-responsive genes. In the core regulatory sector, MYC2 transcription factor transcriptional cascades are conserved in different species but with distinct regulators (e.g. bHLH6 in rice), in which genes are early expressed across all tissues. In the feedback sector, MYC2 also regulates the expression of JA repressor and catabolic genes, providing negative feedback that truncates the duration of JA responses. For example, the MYC2-regulated NAC (NAM, ATAF1/2, and CUC2) transcription factor genes NAC1, NAC3, and NAC4 encode proteins that repress JA signaling and herbivore resistance. In the tissue-specific sector, many late-expressed genes are associated with the biosynthesis of specialized metabolites that mediate particular defensive functions. For example, the terpene synthase gene TPS35 is specifically induced in the leaf sheath and TPS35 functions in defense against oviposition by brown planthoppers and the attraction of this herbivore's natural enemies. Thus, by characterizing core, tissue-specific, and feedback sectors of JA-elicited defense responses, this work provides a valuable resource for future discoveries of key JA components in this important crop. Jasmonate-mediated defense responses in rice can be divided into the core regulatory sector, the local tissue-specific sector, and the negative feedback sector.

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