植物和豆虫在唾液效应器中表现出功能上的相似性,它们通过不同的机制准类似胚芽的蛋白质
Hai-Jian Huang1, Hai-Bin Lu1, Xiao-Tian Yan1
1State Key Laboratory for Quality and Safety of Agro-Products, Institute of Plant Virology, Ningbo University, Ningbo 315211, China.
Plant physiology
|February 5, 2026
概括
昆虫使用不同的唾液蛋白来抑制植物免疫力,通过向胚芽样蛋白 (GLPs). 这些因子,虽然结构不同,但抑制GLP活动或促进其降解,帮助昆虫食和繁殖.
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
- 昆虫化学生态学 昆虫化学生态学
背景情况:
- 植物保存了免疫系统,以防御昆虫食草动物.
- 昆虫分泌特定物种的唾液蛋白来操纵植物的防御系统.
- 多种昆虫唾液对抗植物免疫力的机制尚不清楚.
研究的目的:
- 为了阐明不同昆虫的唾液效应器如何准保存的植物免疫成分.
- 调查来自Nilaparvata lugens和Riptortus pedestris的特定唾液蛋白在植物防御调节中的作用.
主要方法:
- 鉴定和描述了唾液蛋白NlGTSP (N. lugens) 和RPGDSP (R. pedestris) 的特征.
- 利用宿主植物 (大米和大豆) 的基因淘汰和过度表达来评估效应器功能.
- 研究了蛋白质相互作用和酶活性抑制 (NlGTSP) 和无化途径参与 (RpGDSP).
主要成果:
- NlGTSP的目标是米苗样蛋白 (GLPs),抑制它们的酶活性,提高昆虫的表现.
- RpGDSP针对大豆GLPs,通过ubiquitin途径促进它们的降解,从而促进昆虫的食.
- 尽管缺乏序列相似性,但两种效应器都通过不同的分子机制功能性地准GLP.
结论:
- 来自不同昆虫物种的唾液效应器在向植物胚芽类蛋白质方面表现出功能上的相似性.
- 昆虫唾液蛋白使用不同的分子策略来抑制保存的植物免疫反应.
- 了解这些效应器-目标相互作用,可以深入了解植物防御进化和昆虫适应.
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