Collaborative Research: LEXEN: Biological and Chemical Energetics of Deep-Sea SubSurface Life: Evolutionary and Exobiological Implications

合作研究：LEXEN：深海地下生命的生物和化学能量学：进化和外生物学的影响

• 批准号: 9816491
• 负责人: John Baross
• 金额: $ 22.5万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9816491&HistoricalAwards=false
• 关键词: Collaborative; Research; LEXEN; Biological; Chemical

The overall objective of this project is to examine the specific nature of the microbial population within deep sea subsurface environments. This project has four components: 1) to characterize the biodiversity that exists in subseafloor environments and determine the nature of constituent microbial physiologies; 2) to determine the chemical bioenergetics of the subsurface, specifically the carbon, nitrogen, sulfur, and phosphorous species of microbial relevance that are prevalent in subsurface environments; 3) to determine the intracellular bioenergetics of model hetertrophic hyperthermophiles and those newly-isolated from the subsurface, including their primary energy currency and electron carriers, and their organic and inorganic `signatures`; and 4) to characterize the extracellular bioenergetics of known and newly-isolated hyperthermophiles in subsurface environments, including electron donors and acceptors, inorganic nutrients, and their capacity to produce exocellular polymers, to inhabit biofilms, and to exist as consortia. The results of this project are to serve as a paradigm for the characterization of extraterrestrial ecosystems and potential life forms therein.

该项目的总体目标是研究深海地下环境中微生物种群的具体性质。该项目有四个组成部分：1)表征海底环境中存在的生物多样性，确定组成微生物生理的性质；2)确定地下的化学生物能量学，特别是在地下环境中普遍存在的与微生物相关的碳、氮、硫和磷物种；3)确定模式异养型嗜热微生物和新分离的嗜热微生物的细胞内生物能量学，包括它们的主要能量货币和电子载体，以及它们的有机和无机“特征”；4)表征地下环境中已知和新分离的超嗜热菌的胞外生物能量学，包括电子供体和受体、无机营养物，以及它们产生胞外聚合物、栖息在生物膜上和以群体形式存在的能力。该项目的结果将作为表征地外生态系统及其潜在生命形式的范例。