Cloning and functional analysis of the novel rice blast resistance gene Pi65 in japonica rice
文献类型： 外文期刊
作者： Wang, Lili 1 ; Ma, Zuobin 2 ; Kang, Houxiang 3 ; Gu, Shuang 1 ; Mukhina, Zhanna 4 ; Wang, Changhua 2 ; Wang, Hui 5 ; Bai, 1 ;
作者机构： 1.Shenyang Agr Univ, Rice Res Inst, Shenyang 110866, Peoples R China
2.Liaoning Acad Agr Sci, Rice Res Inst Liaoning Prov, Shenyang 110101, Peoples R China
3.Chinese Acad Agr Sci, Inst Plant Protect, Beijing 110193, Peoples R China
4.Innovat & R&D Coordinat FSBSI ARRRI, Krasnodar 350921, Russia
5.Liaoning Acad Agr Sci, Shenyang 110161, Peoples R China
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）
ISSN： 0040-5752
年卷期：
页码：
收录情况： SCI
摘要： Key message Pi65, a leucine-rich repeat receptor-like kinase (LRR-RLK) domain cloned from Oryza sativa japonica, is a novel rice blast disease resistance gene. Rice blast seriously threatens rice production worldwide. Utilizing the rice blast resistance gene to breed rice blast-resistant varieties is one of the best ways to control rice blast disease. Using a map-based cloning strategy, we cloned a novel rice blast resistance gene, Pi65, from the resistant variety GangYu129 (abbreviated GY129, Oryza sativa japonica). Overexpression of Pi65 in the susceptible variety LiaoXing1 (abbreviated LX1, Oryza sativa japonica) enhanced rice blast resistance, while knockout of Pi65 in GY129 resulted in susceptibility to rice blast disease. Pi65 encodes two transmembrane domains, with 15 LRR domains and one serine/threonine protein kinase catalytic domain, conferring resistance to isolates of Magnaporthe oryzae (abbreviated M. oryzae) collected from Northeast China. There were sixteen amino acid differences between the Pi65 resistance and susceptible alleles. Compared with the Pi65-resistant allele, the susceptible allele exhibited one LRR domain deletion. Pi65 was constitutively expressed in whole plants, and it could be induced in the early stage of M. oryzae infection. Transcriptome analysis revealed that numerous genes associated with disease resistance were specifically upregulated in GY129 24 h post inoculation (HPI); in contrast, photosynthesis and carbohydrate metabolism-related genes were particularly downregulated at 24 HPI, demonstrating that disease resistance-associated genes were activated in GY129 (carrying Pi65) after rice blast fungal infection and that cellular basal metabolism and energy metabolism were inhibited simultaneously. Our study provides genetic resources for improving rice blast resistance and enriches the study of rice blast resistance mechanisms.
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