The life cycle of the deep-sea Bathymodiolus metaorganism: symbiont transmission and colonization of the host gill epithelium (C03)

深海Bathymodiolus代谢生物的生命周期：宿主鳃上皮的共生传播和定植（C03）

• 批准号: 284398546
• 金额: --
• 依托单位: Max-Planck-Institut für Marine Mikrobiologie
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/284398546?language=en
• 关键词: life; cycle; deep; sea; Bathymodiolus

Bathymodiolus mussels rely on intracellular symbiotic bacteria in their gill epithelia that use reduced chemicals from the environment such as hydrogen sulfide and methane as an energy source to fix carbon dioxide or methane into biomass. Many Bathymodiolus species host two co-occurring symbionts, a single sulfur-oxidizing species and a single methane-oxidizing species. However, recent molecular studies revealed that strain diversity within these two symbiont species is greater than previously assumed based on 16S rRNA gene analyses. Here we propose to study the Bathymodiolus symbiont population dynamics and the impact of microbial diversification on the metaorganism development and function. Our research is expected to reveal new insights into the ecology and evolutionary dynamics of symbiont acquisition and transmission mode, as well as a better understanding of the role of symbiont diversity in the ecology and evolution of metaorganisms.

Bathymodiolus贻贝依靠其鳃上皮细胞内的共生细菌，利用环境中减少的化学物质（例如硫化氢和甲烷）作为能源，将二氧化碳或甲烷固定为生物质。许多Bathymodiolus物种拥有两种共存的共生体，即单一的硫氧化物种和单一的甲烷氧化物种。然而，最近的分子研究表明，这两个共生体物种内的菌株多样性高于之前基于 16S rRNA 基因分析的假设。在这里，我们建议研究Bathymodiolus共生体种群动态以及微生物多样化对代谢有机体发育和功能的影响。我们的研究有望揭示对共生体获取和传播模式的生态学和进化动力学的新见解，以及更好地理解共生体多样性在代谢生物体的生态和进化中的作用。