Diversity and role of aerobic heterotrophic bacteria in the cycling of autochthonous and allochthonous organic carbon in marine microbial mats

好氧异养细菌在海洋微生物垫中本地和外来有机碳循环中的多样性和作用

• 批准号: 5422673
• 负责人: Dr. Dirk de Beer
• 金额: --
• 依托单位: Max-Planck-Institut für Marine Mikrobiologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5422673?language=en
• 关键词: Diversity; role; aerobic; heterotrophic; bacteria

The project is a basic study of the species distribution, activity and physiology of dominant aerobic chemotrophic microorganisms in marine micriobial mats. Aerobic chemotrophs are chiefly responsible for the maintenance of the carbon cycle within mats. Nevertheless, surprisingly little research has been done on this group and its degradative capabilities are largely unknown, probably because former scientific interest in mats was centered around cyanobacterial photosynthesis. The chosen system for the study are oil-impacted mats at the Gulf coast of Saudi Arabia. The project will be German-Saudi collaboration. These mats are rich and unique study subjects because they (a) must harbor degraders of the indigenous organic compounds as any other mat, (b) must harbor in addition degraders of oil compounds as external substances of environmental concern, and (c) develop at seasonally high temperature and salinity such that the degraders are expected tro represent novel extremotolerant aerobes; their knowledge may in the longer run contribute to the development of bioremediation strategies under the given conditions. Study approaches include measurement of the chemical micro-zonation, substrate and metabolite analyses, molecular community analyses, strain isolation and physiological characterization.

本项目是对海洋微生物席中优势好氧化养微生物的种类分布、活性和生理进行基础性研究。好氧化养生物主要负责维持草席内的碳循环。然而，令人惊讶的是，对这一群体的研究很少，其降解能力在很大程度上是未知的，可能是因为以前对草席的科学兴趣主要集中在蓝藻的光合作用上。该研究选择的系统是沙特阿拉伯海湾沿岸受石油影响的垫。该项目将由德国和沙特合作。这些垫子是丰富而独特的研究对象，因为它们(a)必须像任何其他垫子一样含有本地有机化合物的降解物，(b)必须另外含有油化合物的降解物，作为环境关注的外部物质，以及(c)在季节性高温和高盐度环境中发展，这样降解物被期望代表新的极端耐受性需氧菌；从长远来看，他们的知识可能有助于在给定条件下开发生物修复策略。研究方法包括化学微带测量、底物和代谢物分析、分子群落分析、菌株分离和生理表征。