Plant Controls of Terrestrial Trace Gas Fluxes: Legumes, Microbes, CO and Hydrogen

陆地微量气体通量的植物控制：豆类、微生物、二氧化碳和氢气

• 批准号: 0089900
• 负责人: Gary King
• 金额: $ 37.36万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0089900&HistoricalAwards=false
• 关键词: Plant; Controls; Terrestrial; Trace; Gas

This research seeks to determine the role of plant-microbe interactions on the production and fate of key trace gases in the atmosphere, particularly carbon monoxide (CO) and hydrogen (H2). Recent observations have revealed that the roots of all plants produce CO, and that the roots of nitrogen-fixing plants (Fabacae, commonly legumes) produce large amounts of both CO and H2. Production of these gases provides the basis for an interaction of plant roots with soil microbes that oxidize CO and H2. Field and greenhouse studies will involve a variety of cultivated and non-cultivated legumes and other plant taxa. Experimental analyses will include measurements of gas exchange in situ, measurements of root gas production, isolation and characterization of trace-gas utilizing microbes, and applications of molecular techniques based on the use of 16S rRNA and rubisco genes. The research will lead to insights about the controls of atmospheric trace gas composition and the impacts of land use and agricultural practices.

本研究旨在确定植物-微生物相互作用对大气中关键微量气体（特别是一氧化碳 (CO) 和氢气 (H2)）的产生和归宿的作用。最近的观察表明，所有植物的根部都会产生二氧化碳，并且固氮植物（豆科植物，通常为豆科植物）的根部会产生大量的二氧化碳和氢气。 这些气体的产生为植物根部与氧化 CO 和 H2 的土壤微生物相互作用提供了基础。实地和温室研究将涉及各种栽培和非栽培豆科植物以及其他植物类群。实验分析将包括原位气体交换的测量、根部气体产生的测量、利用微生物的痕量气体的分离和表征，以及基于 16S rRNA 和 rubisco 基因的分子技术的应用。 该研究将深入了解大气微量气体成分的控制以及土地利用和农业实践的影响。