根结线虫产生功能模仿的氨酸硫酸植物
Henok Zemene Yimer1, Dee Dee Luu2, Alison Coomer Blundell2
1Department of Entomology and Nematology, University of California, Davis, CA 95616.
概括
根结线虫使用植物激素来促进根生长和建立食点. 这些线虫分泌的,MigPSYs,是成功寄生虫的关键毒性因素.
科学领域:
- 植物病理学 植物病理学
- 分子寄生虫学 分子寄生虫学
- 植物与微生物的相互作用
背景情况:
- 根结线虫 (Meloidogyne spp.) 是一种根结线虫. 是主要的农业害虫,在全球范围内造成重大作物损失.
- 线虫寄生包括操纵宿主植物的途径,包括根部发育和防御.
- 植物利用含有硫酸铁 (PSY) 的植物类来促进根的生长,而像Xanthomonas这样的病原体则使用类似的来产生毒性.
研究的目的:
- 识别和表征由线虫衍生的,具有潜在的寄生虫作用.
- 研究这些在线虫毒性和宿主操纵中的功能.
- 探索线虫和细菌之间基于的毒性策略的融合进化.
主要方法:
- 生物信息分析以识别编码PSY样的线虫基因 (MigPSYs).
- 将MigPSY合成并应用于Arabidopsis,以评估它们对根生长的影响.
- 定量PCR分析线虫感染期间的MigPSY转录水平.
- RNA干扰 (RNAi) 来降低MigPSY表达,并评估其对胆汁和卵子生产的影响.
主要成果:
- 线虫拥有预测为编码PSY类 (MigPSYs) 的基因,同类于植物PSY和细菌RaxX.
- 合成MigPSYs促进Arabidopsis的根生长,类似于植物PSYs.
- 在线虫感染的早期,MigPSY转录水平达到峰值.
- 降低MigPSY表达的调节显著降低了根结和线虫卵产量.
结论:
- 线虫分泌MigPSYs,它们通过劫持促进植物生长的途径来发挥毒性因子的作用.
- 线虫和细菌都进化了,可以利用类似的硫酸来操纵植物的发展,使它们受益.
- MigPSYs代表了一类新型的线虫效应物,参与促进寄生虫的作用.
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