由病原体诱导的内源性小类植物硫因被膜受体OsPSKR2感知 提高了大米的抗病能力
Minghao Liu1, Guangzhong Zhang2, Longjun Zeng3
1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.
Plant, cell & environment
|December 8, 2025
概括
植物硫 (PSK) 信号增强了大米对诸如Magnaporthe oryzae.等真菌病原体的抗性. PSK受体OsPSKR2对于这种宽谱免疫是至关重要的,可以增强防御,而不会影响大米产量.
科学领域:
- 植物病理学 植物病理学
- 分子植物-微生物相互作用
- 植物免疫力 植物免疫力
背景情况:
- 由Magnaporthe oryzae引起的水爆炸,破坏了水生产.
- 植物使用复杂的分子防御来对抗病原体.
- 硫 (PSK) 是一种内源性激素,参与植物生长和发育.
研究的目的:
- 调查植物硫 (PSK) 信号传导在防治大米抗 Magnaporthe oryzae.e 的作用.
- 为了识别涉及到大米爆炸耐药性的PSK受体.
- 阐明米中PSK介导免疫的基础分子机制.
主要方法:
- 在M. oryzae感染后对前植物硫 (prePSK) 的基因表达分析.
- 活性PSKα的外部应用,以评估其对大米耐药性的影响.
- 对PSK七重突变和OsPSKR2过度表达线的表型分析.
- 基因和生化分析证实OsPSKR2作为一个功能性的PSK受体.
- 测量与病变发生相关的 (PR) 基因表达和反应性氧物种 (ROS) 生产.
主要成果:
- 在米中,M. oryzae感染诱导了PSK前的表达.
- 外源PSKα的应用增强了大米的爆破性.
- OsPSKR2被确定为一种功能性的PSK受体,对PSK介导的抗性至关重要.
- 过度表达OsPSKR2通过上调PR基因和ROS生产而提高耐药性,而不会影响产量.
- OsPSK-PSKR2信号通路,依赖于OsTPST介导的氨酸硫化,赋予广泛的电阻.
结论:
- 植物硫黄-植物硫黄受体 (PSK-PSKR) 模块在防治真菌病原体的水免疫力中发挥着至关重要的作用.
- OsPSKR2是PSK信号通路的关键组成部分,使大米具有广泛的抗病能力.
- 针对PSK-PSKR途径提供了一种有前途的策略,可以在不影响产量的情况下提高作物弹性.
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