在虫-寄生虫领域社区中,共生体传递的耐药性的高特异性
Elena Gimmi1,2, Christoph Vorburger1,2
1Department of Aquatic Ecology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
Journal of evolutionary biology
|February 17, 2024
概括
细菌内共生体Hamiltonella defensa保护黑豆虫免受寄生虫的侵害. 这种保护是主要寄生虫Lysiphlebus fabarum的特征,并且取决于虫共生体和寄生虫的基因型.
科学领域:
- 进化生物学是进化的生物学.
- 生态生态学 生态生态学
- 微生物遗传学微生物遗传学
背景情况:
- 主体-寄生虫共同进化涉及的基因相互作用驱动相互适应.
- 细菌内共生体Hamiltonella defensa赋予了黑豆虫 (Aphis fabae fabae) 对寄生虫的抵抗力.
- 以前的研究表明,对不同寄生虫物种和基因型的保护是可变的,但使用了非代表性的实验室线.
研究的目的:
- 在自然种群中研究交生体介导的虫耐药性的物种和基因型特异性.
- 评估Hamiltonella defensa对Aphis fabae fabae的常见寄生虫的保护作用.
- 了解野生虫-寄生虫群体中基因型对基因型相互作用的作用.
主要方法:
- 从自然的Aphis fabae fabae群体中对寄生虫进行全面采样.
- 用五种丰富的寄生虫物种测量寄生虫率,这些寄生虫在有流行H. defensa单体类型的虫上.
- 对H. defensa和寄生虫Lysiphlebus fabarum.之间基因型特异性相互作用的分析.
主要成果:
- 汉密尔托尼拉防御只对主要的寄生虫Lysiphlebus fabarum (70%的寄生虫) 提供了显著的抵抗力.
- 没有观察到对少见的寄生虫物种的耐药性.
- 对L. fabarum的耐药性高度基因型特异,表明H. defensa和寄生虫之间的复杂基因对基因相互作用.
结论:
- 野生黑豆种群的共生体传递的耐药性以强大的物种和基因型特异性为特征.
- 这些发现支持了共生体介导的虫适应它们最危险的寄生虫的假设.
- 结果强调了研究自然,本地适应的社区的重要性,以了解宿主-寄生虫动态.
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