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ORYZA SATIVA SPOTTED-LEAF 41(OsSPL41) Negatively Regulates Plant Immunity in Rice

查看全文 作　　者：TAN [1]Jingyi;ZHANG [1]Xiaobo;SHANG [1]Huihui;LI [1]Panpan;WANG [1]Zhonghao;LIAO [1]Xinwei;XU [1]Xia;YANG [1]Shihua;GONG [1]Junyi;WU [1]Jianli 高影响力作者 机构地区：[1]State Key Laboratory of Rice Biology and Breeding,China National Rice Research Institute,Hangzhou 310006,China高影响力机构 出　　处：《Rice science》索引2023年第30卷第5期,共15页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Grant No.32072049);the Central Public-Interest Scientific Institution Basal Research Fund, China(Grant No.CPSIBRF-CNRRI-202203)。 摘　　要：Identification of immunity-associated leucine-rich repeat receptor-like protein kinases(LRR-RLK) is critical to elucidate the LRR-RLK mediated mechanism of plant immunity.Here,we reported the map-based cloning of a novel rice SPOTTED-LEAF 41(Os SPL41) encoding a putative LRR-RLK protein(Os LRR-RLK41/Os SPL41) that regulated disease responses to the bacterial blight pathogen Xanthomonas oryzae pv.oryzae(Xoo).An 8-bp insertion at position 865 bp in a mutant spotted-leaf 41(spl41) allele led to the formation of purple-brown lesions on leaves.Functional complementation by the wild type allele(Os SPL41) can rescue the mutant phenotype,and the complementary lines showed similar performance to wild type in a number of agronomic,physiological and molecular indices.Os SPL41 was constitutively expressed in all tissues tested,and Os SPL41 contains a typical transmembrane domain critical for its localization to the cell membrane.The mutant exhibited an enhanced level of resistance to Xoo in companion of markedly up-regulated expression of pathogenesis-related genes such as Os PR10a,Os PAL1 and Os NPR1,while the level of salicylic acid was significantly increased in spl41.In contrast,the over-expression lines exhibited a reduced level of H_(2)O_(2) and were much susceptible to Xoo with down-regulated expression of pathogenesis-related genes.These results suggested that Os SPL41 might negatively regulate plant immunity through the salicylic acid signaling pathway in rice. 关 键 词：bacterial blight leucine-rich repeat receptor-like protein kinase plant immunity reactive oxygen species RICE spotted leaf
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