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ART1 and putrescine contribute to rice aluminum resistance via OsMYB30 in cell wall modification

Journal of Integrative Plant Biology 2023年第4期65卷 934-949页

作者： Li Jun Gao Xiang Pei Liu Ke Ke Gao Meng Qi Cui Hui Hui Zhu Gui Xin Li Jing Ying Yan Yun Rong Wu Zhong Jie Ding Xue Wei Chen Jian Feng Ma nicholas pharberd Shao Jian Zheng State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou 310058China Guangdong Laboratory for Lingnan Modern Agriculture College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 5100642China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China College of Agronomy and Biotechnology Zhejiang UniversityHangzhou 310058China Agricultural Experimental Station Zhejiang UniversityHangzhou 310058China Rice Research Institute Sichuan Agricultural University at WenjiangChengdu 611130China Institute of Plant Science and Resources Okayama UniversityKurashiki 710‐0046Japan Department of Plant Science University of OxfordOxford OX13RBUnited Kingdom

Cell wall is the first physical barrier to aluminum(Al)*** of cell wall properties to change its binding capacity to Al is one of the major strategies for plant Al resistance;nevertheless,how it is regulated in rice remains largely *** this study,we show that exogenous application of putrescines(Put)could significantly restore the Al resistance of art1,a rice mutant lacking the central regulator Al RESISTANCE TRANSCRIPTION FACTOR 1(ART1),and reduce its Al accumulation particularly in the cell wall of root *** on RNA-sequencing,yeast-onehybrid and electrophoresis mobility shift assays,we identified an R2R3 MYB transcription factor OsMYB30 as the novel target in both ART1-dependent and Put-promoted Al ***,transient dual-luciferase assay showed that ART1 directly inhibited the expression of OsMYB30,and in turn repressed Os4CL5-dependent 4-coumaric acid accumulation,hence reducing the Al-binding capacity of cell wall and enhancing Al ***,Put repressed OsMYB30 expression by eliminating Alinduced H2O2accumulation,while exogenous H2O2promoted OsMYB30 *** concluded that ART1 confers Put-promoted Al resistance via repression of OsMYB30-regulated modification of cell wall properties in rice.

关键词： ART1 cell wall 4‐coumaric acid OsMYB30 Os4CL5 putrescine

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