光诱导的OsLIKE1酸化增强了大米对爆发性疾病的抵抗力
Jiangtao Liu1, Lei Su1, Wenya Wang1
1State Key Laboratory of Agricultural and Forestry Biosecurity, Sanya Institute of Nanjing Agricultural University, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, and Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjin, China.
Nature communications
|December 23, 2025
概括
OsLIKE1,一种莱克受体类激酶 (LecRLK),通过化LHCB5.5来激活抗爆病的水免疫力. 在OsLIKE1中特定的SNP
科学领域:
- 植物病理学 植物病理学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 由Magnaporthe oryzae引起的水爆炸,威胁着全球粮食安全.
- 照明条件影响米的免疫力,光依赖的光收获复合II蛋白质 (LHCB5) 的酸化起作用.
- 在大米免疫中LHCB5酸化的上游调节者仍然在很大程度上是未知的.
研究的目的:
- 为了确定参与大米免疫的LHCB5酸化的上游调节者.
- 阐明光线影响大米对M. oryzae.防御的分子机制.
- 探索OsLIKE1在抗爆病中的作用.
主要方法:
- 酵母双杂交和体外激酶试验以研究蛋白质相互作用和酸化.
- 位点定向突变发生,以确定OsLIKE1.1.中的关键酸化位点.
- 在不同的光照条件下分析OsLIKE1促进子区域和基因表达.
- 改变了OsLIKE1活动的米植物的表型分析.
主要成果:
- OsLIKE1,一种类似于莱克受体的激酶 (LecRLK),被确定为大米免疫的关键调节者.
- OsLIKE1直接与光采集复合体的组成部分LHCB5相互作用并酸化.
- 在OsLIKE1的激酶域内有两个特定的酸化位点,对于其自身酸化和LHCB5酸化至关重要.
- 在OsLIKE1促销器区域的单核酸多态 (SNP) 调节光诱导表达并增强OsLIKE1自酸化,导致LHCB5酸化和植物防御的增加.
结论:
- OsLIKE1在米中的光信号和植物免疫之间起着至关重要的作用.
- 涉及OsLIKE1和LHCB5的酸化级联是对抗大米爆炸的光介导防御的关键机制.
- OsLIKE1的活性受到促进SNP的调节,为培育抗病米品种提供了潜在的目标.
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