Dynamics and Energetics of Nitrogen Uptake by Marine Bacteria

海洋细菌吸收氮的动力学和能量学

• 批准号: 8922718
• 负责人: Joel Goldman
• 金额: $ 22.58万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922718&HistoricalAwards=false
• 关键词: Dynamics; Energetics; Nitrogen; Uptake; Marine

It has become increasingly obvious that bacteria play a major role in the microbial food loop of the world's oceans. Considerable confusion has existed in the past as to whether microbes or protozoa play the major role in regenerating nitrogenous nutrients to fuel phytoplankton growth. This confusion stems from the lack of basic information on the nitrogen uptake characteristics of bacteria and the relationship between the supply and physiological requirements of organic and inorganic sources of nitrogen. Dr. Goldman will continue his work towards addressing these fundamental questions. He will complete studies on nitrogen dynamics at very low growth rates: complete studies at very low substrate concentrations under carbon and nitrogen limiting conditions: examine the kinetics and energetics of multiple carbon and nitrogen substrate utilization: and determine the conditions under which nitrogen limitation and growth rate influence the formation of cell attachment by bacteria.

越来越明显的是，细菌在世界海洋的微生物食物循环中起着重要作用。过去一直存在着相当大的困惑，即微生物还是原生动物在再生含氮营养物质以促进浮游植物生长方面起主要作用。这种混淆源于缺乏关于细菌氮吸收特性的基本信息，以及有机和无机氮来源的供应和生理需求之间的关系。戈德曼博士将继续致力于解决这些基本问题。他将在极低生长速率下完成氮动力学的研究；在极低的底物浓度下完成碳氮限制条件下的研究；检查多种碳氮底物利用的动力学和能量学；并确定氮限制和生长速度对细菌形成细胞附着物的影响条件。