在Coreoidea昆虫中,严格的肠共生特异性受到Caballeronia菌株内物种间竞争的支配
Gaëlle Lextrait1, Srotoswini Joardar1,2,3, Raynald Cossard1
1Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France.
The ISME journal
|November 13, 2025
概括
臭虫在肠道中选择特定的有益细菌菌株,显示出微调的共生体特异性. 这种宿主驱动的选择确保最适应的卡巴勒罗尼亚菌株在中肠中殖民,以实现最佳的共生.
科学领域:
- 微生物学 微生物学
- 生态生态学 生态生态学
- 进化生物学 进化生物学
背景情况:
- 宿主-细菌共生对于许多生物来说至关重要,并且通常具有高度的特异性.
- 在从环境中获得共生体的昆虫中,选择性过程对于识别有益的微生物伙伴至关重要.
- 在Coreoidea臭虫中,中肠是环境获得的共生体的港湾,细菌竞争在共生体特异性中发挥着关键作用.
研究的目的:
- 为了研究Coreoidea臭虫的肠道内共生选择的机制.
- 为了确定不同菌株的共生体卡巴勒罗尼亚之间是否存在竞争.
- 阐明主机-微生物相互作用中微量分类学特异性的驱动因素.
主要方法:
- 从土壤中对Riptortus pedestris和Coreus marginatus选择的Caballeronia亚类进行比较分析.
- 使用单种植和与不同Caballeronia亚种类 (α,β,γ) 配对共感染的Gnotobiotic感染实验.
- 影响竞争的分子因素 (代谢能力,抗微生物耐药性,化疗作用) 和生态机制 (优先效应,排位) 的研究.
主要成果:
- 主体R. pedestris和C. marginatus优先选择来自同一土壤来源的不同的Caballeronia亚分类 (分别是α和β).
- 虽然所有子类可以独立殖民,但双重感染显示了α或β子类的宿主特异性选择.
- 竞争结果受到优先效应和位移的影响,例如代谢功能和抗菌素耐药性等分子特征决定了竞争成功.
- 宿主生殖健康益处与R. pedestris.中的共生菌株特异性相关.
结论:
- 在Coreoidea物种中,肠道环境充当了对共生细菌的多因素,特定物种的选择性过器.
- 细菌菌株之间的竞争,而不仅仅是物种之间的竞争,推动了微小的共生特异性.
- 主体选择机制确保了最适应的卡巴勒罗尼亚菌株的殖民,将共生体的竞争力与主体健康联系起来.
关键词:
卡巴莱罗尼亚 (Caballeronia) 是一个古老的品种.核心 (Coreus marginatus) 是一个非常重要的核心.里普托尔图斯 (Riptortus pedestris) 是一个步行者.抗微生物类的抗微生物.细菌与细菌之间的竞争.化学反应的化学作用.肠道共生是肠道的共生.昆虫与细菌的相互作用代谢能力的代谢能力.更多相关视频
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