植物病毒利用昆虫的唾液GAPDH调节植物的防御能力
Xin Wang1, Haibo Wu1, Zhongkai Yu1
1State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China.
Nature communications
|August 12, 2024
概括
昆虫唾液蛋白,甘甲基-3-酸盐脱酶 (GAPDH),通过外体传递,以抑制大米的防御. 这促进了病毒的传播,但也触发了植物的反防御机制.
科学领域:
- 植物与昆虫的相互作用
- 分子植物病理学 分子植物病理学
- 生物化学 生物化学
背景情况:
- 昆虫食草动物分泌的唾液蛋白可以抑制植物的防御.
- 在 Recilia dorsalis (RdGAPDH) 唾液中的甘-3-酸脱酶 (GAPDH) 涉及到大米胆小矮病毒 (RGDV) 的传播.
- 唾液蛋白调节植物免疫力并促进病毒传播的确切机制尚未完全理解.
研究的目的:
- 调查RdGAPDH在RGDV传播期间在R.dorsalis唾液中的作用.
- 为了阐明RdGAPDH传递到大米植物中的途径.
- 了解RdGAPDH如何影响大米植物的防御,以及植物如何反应.
主要方法:
- 从R.dorsalis的唾液腺中追踪RdGAPDH的外体释放到水中.
- 评估RdGAPDH对大米植物中过氧化 (H2O2) 的酶活性.
- 分析植物防御反应,包括对RdGAPDH的谷氨S-谷氨化.
主要成果:
- 在R. dorsalis食过程中,RdGAPDH通过外体分泌到水中.
- 在R.dorsalis感染上调节外体RdGAPDH释放.
- RdGAPDH消耗了大米中的H2O2,减少了氧化应激,并促进了昆虫的食和RGDV的传播.
- 米植物激活了依赖谷氨的S-谷氨化,以抵消RdGAPDH诱导的细胞毒性.
- 来自其他半球动物的唾液GAPDH也抑制了植物H2O2爆发.
结论:
- 植物病毒利用昆虫唾液蛋白质,如RdGAPDH,通过外体传递,以抑制宿主防御.
- 这一策略确保了可持续的昆虫养,并促进了病毒传播.
- 采用特定的防御机制来缓解由唾液蛋白引起的细胞损伤.
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