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细胞内共生体Symbiodolus是垂直传播的,并在昆虫群中广泛传播
Jürgen C Wierz1, Philipp Dirksen1,2, Roy Kirsch1
1Department of Insect Symbiosis, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany.
The ISME journal
|June 14, 2024
概括
一种新发现的细菌Symbiodolus clandestinus是一种广泛分布的昆虫内共生体,在多个昆虫种群中发现. 这种细菌可能使用混合传播模式,为其流行做出了贡献,并提供了对共生的见解.
科学领域:
- 微生物生态学 微生物生态学
- 昆虫的共生 昆虫的共生
- 细菌遗传学 细菌遗传学
背景情况:
- 昆虫-细菌相互作用存在于从寄生虫到互惠主义的频谱中.
- 很少有细菌种群能够成功地殖民各种各样的昆虫,需要专门的机制来殖民宿主和持久.
研究的目的:
- 报告发现和描述了一种新型的,广泛传播的昆虫内共生体,Symbiodolus clandestinus.
- 研究这种共生体的传播方式,基因组特征以及对其宿主昆虫的潜在益处.
主要方法:
- 光现场杂交 (FISH) 用于确定昆虫组织和生命阶段内的共生物定位.
- 在16个宿主种群中对Symbiodolus的全基因组测序.
- 植物遗传学分析以评估宿主-共生体共属性.
主要成果:
- 秘密交生虫 (Symbiodolus clandestinus) 在至少六个昆虫类中普遍存在,在所有生命阶段和组织中都能在细胞内发现,特别是卵巢,这表明通过卵巢传播.
- 测序的基因组显示保存,富含转子子的基因组与分泌系统,效应器和毒素-抗毒素系统,表明宿主细胞进入机制.
- 受感染的昆虫没有表现出疾病,细菌基因组编码了氨基酸/辅因子生物合成的途径,这意味着潜在的宿主益处. 缺乏协同分类表明水平传播.
结论:
- Symbiodolus代表了一种新描述的,广泛传播的昆虫内生生物,具有混合的传播策略 (垂直和水平).
- 它的基因组特征表明了宿主殖民的能力和潜在的相互利益.
- 这一发现为研究昆虫共生建立和维持的分子基础提供了有价值的模型.
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