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.

在光合作用潜力低的南极沙漠中，我们发现土壤微生物通过一种依赖于痕量气体的新过程来维持其能量和碳预算，我们将其称为“大气化学合成”。但是土壤细菌是如何在空气中生存的呢？该项目旨在揭示培养的土壤细菌中的功能性化能自养途径，这些细菌使用痕量气体作为能量和碳获取的来源。 我们将对第一个具有这种被忽视的过程遗传能力的模型菌株进行基因组学、转录组学和蛋白质组学研究。结果将推进微生物代谢的知识，扩大氢氧化细菌的剧目土壤生态系统服务，主要是初级生产。