The rare biosphere; discovering how soil bacteria live on air

稀有的生物圈；

• 批准号: DP220103430
• 负责人: Prof Belinda Ferrari
• 金额: $ 35.28万
• 依托单位: The University of New South Wales
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2022
• 资助国家: 澳大利亚
• 起止时间: 2022-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP220103430
• 关键词: rare; biosphere; discovering; how; soil

In Antarctic deserts where photosynthetic potential is low, we discovered that soil microbiomes sustain their energy and carbon budgets through a novel process reliant on trace gases we coined 'atmospheric chemosynthesis'. But how do soil bacteria literally live on air? This project aims to reveal functional chemoautotrophic pathways in cultured soil bacteria that use trace gases as a source of energy and carbon acquisition. We will perform biogeochamistry, transcriptomics and proteomics on the first model bacterial strains genetically capable of this overlooked process. Outcomes will advance knowledge on microbial metabolism, extending the repertoire of hydrogen-oxidising bacteria to soil ecosystem services, primarily primary production.

在光合作用潜力较低的南极沙漠中，我们发现土壤微生物群通过一种依赖微量气体的新过程来维持它们的能量和碳收支，我们称之为“大气化学合成”。但是土壤细菌是如何在空气中生存的呢？本项目旨在揭示培养土壤细菌利用微量气体作为能量和碳获取来源的功能化学自养途径。我们将进行生物地球化学，转录组学和蛋白质组学对第一个模型菌株遗传上能够这一被忽视的过程。结果将推进微生物代谢的知识，将氧化氢细菌的曲目扩展到土壤生态系统服务，主要是初级生产。