Cemoautolithotrophy (Chemosynthesis) and Sulfur Metabolism in Magnetotactic Bacteria

趋磁细菌中的自石营养（化学合成）和硫代谢

• 批准号: 9117694
• 负责人: Dennis Bazylinski
• 金额: --
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1993-01-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117694&HistoricalAwards=false
• 关键词: Cemoautolithotrophy; Chemosynthesis; Sulfur; Metabolism; Magnetotactic

Geochemical and physiological processes mediated by magnetotactic bacteria are not well understood despite the fact that these unusual procaryotes are ubiquitous in and easily collected from aquatic habitats. Preliminary results with several new isolates of magnetotactic bacteria strongly suggest that cells of these strains are involved in the oxidation of reduced sulfur and perhaps iron compounds. Moreover, these results show that these strains can grow with reduced sulfur compounds as sole energy (electron) sources using carbon dioxide as the sole carbon source. Thus, it is likely that these new strains can grow chemolithoautotrophically and perhaps mixotrophically as well. Microbiological, chemical, and biochemical strategies will determine the role of these new strains of magnetotactic bacteria in sulfur and iron cycling and their chemolithoautotrophic potential. The results obtained from this study will be invaluable in understanding the overall physiology of magnetotactic bacteria, in ascertaining the geochemical roles magnetotactic bacteria play in nature, in the isolation of new strains, and ultimately in how they synthesize their magnetic mineral component.

趋磁介导的地球化学和生理过程 细菌还没有得到很好的理解，尽管这些事实， 不寻常的原核生物普遍存在于 水生生境 几种新分离株的初步结果 趋磁细菌强烈表明这些菌株的细胞 参与还原硫和铁的氧化 化合物. 此外，这些结果表明，这些菌株可以 以还原硫化合物作为唯一能量（电子）生长 使用二氧化碳作为唯一碳源的来源。 因此 这些新的菌株很可能可以化能自养生长， 也可能是混合营养的。 微生物，化学， 和生化策略将决定这些新的 硫和铁循环中的趋磁细菌菌株， 它们的化能自养潜力 获得的结果 这项研究将是非常宝贵的了解整体 趋磁细菌的生理学，在确定 趋磁细菌在自然界中的地球化学作用， 新菌株的分离，以及它们如何合成 磁性矿物成分。