在叶甲虫中简化消化共生的古世起源
Marleny García-Lozano1, Christine Henzler1, Miguel Ángel González Porras1
1Mutualisms Research Group, Max Planck Institute for Biology, Tübingen 72076, Germany.
Current biology : CB
|February 20, 2024
概括
卡西迪纳叶甲虫获得有益的微生物Candidatus Stammera capleta提供了增强的消化能力,从而增加了植物利用和物种化. 这种有义务的共生是独立于甲虫子家族的独立进化.
科学领域:
- 微生物共生是微生物的共生.
- 进化生物学 进化生物学
- 昆虫生理学 昆虫生理学
背景情况:
- 卡西迪纳叶甲虫和Candidatus Stammera capleta (γ-proteobacterium) 之间的强制共生增强了宿主消化.
- 菌体居住在前肠器官中,补充植物细胞壁降解酶.
- 这种共生在卡西迪纳亚分家族中是共同的,尽管他们的食习惯各不相同.
研究的目的:
- 研究Cassidinae-Stammera共生的时间和分子进化.
- 了解这种伙伴关系对宿主进化的适应性影响.
- 确定 Stammera 的祖先酶谱.
主要方法:
- 遗传学分析以追踪共生体的获取.
- 进行比较基因组学以重建祖先的基因内容.
- 转录组分析以评估共生器官中的基因表达.
主要成果:
- 交生体的获取早于Cassidinae亚家族的起源,早期的血统缺乏交生体和住房器官.
- 在共生开始时,Stammera拥有三种消化酶的核心组合,包括多聚氨酸酶.
- 与非共生亲属相比,共生甲虫的饮食范围更广泛,物种发生率更高.
结论:
- 卡西迪纳-斯塔梅拉的共生是古老的,但与甲虫亚家族的起源并不同时发生.
- 斯塔梅拉显著扩大宿主的代谢潜力,使得更大的生态利基利用.
- 这种共生伙伴关系是Cassidinae亚家族中多样化的关键驱动力.
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