International Research Fellowship Program: Carbonic Anhydrase and C4 Photosynthesis

国际研究奖学金计划：碳酸酐酶和 C4 光合作用

• 批准号: 0401773
• 负责人: Asaph Cousins
• 金额: --
• 依托单位: Cousins Asaph B
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2008-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0401773&HistoricalAwards=false
• 关键词: International; Research; Fellowship; Program; Carbonic

0401773CousinsThe International Research Fellowship Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twenty-two-month research fellowship by Dr. Asaph Cousins to work with Dr. Susanne von Caemmerer at the Australian National University in Canberra.Atmospheric carbon dioxide (CO2) isotope analysis is an important tool for monitoring changes in the physiological processes controlling global exchange of CO2 and net primary productivity (NPP) of terrestrial plant communities. Generally, photosynthesis and respiration have very contrasting effects on the isotope signature of atmospheric CO2. However, a detailed understanding of the steps responsible for CO2 isotope discrimination is needed to accurately distinguish between the processes controlling global CO2 exchange. Carbonic anhydrase (CA) regulates C4 photosynthesis and has been implicated in the isotopicdiscrimination of atmospheric CO2. The proposed research would utilize gas exchange and carbon/oxygen isotope measurements to study the influence of CA on the discrimination of CO2 during C4 photosynthesis in response to global climate change (i.e., water stress and elevated CO2). This research will provide insight into the C4 photosynthetic reactions that directly affect the isotopic composition of atmospheric CO2. A better understanding of the enzymatic reactions and the leaf level gas exchange influencing the atmospheric CO2 isotope composition will allow for the development of more accurate models of current and future climatic conditions. This information will be far-reaching, further enhancing our understanding of the role of C4 plants in global gas exchange and NPP. Dr.von Caemmerer is one of the foremost experts in plant physiology and C4 photosynthesis.

国际研究奖学金计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。 该计划的奖项提供了联合研究的机会，以及使用独特或互补的设施，该奖项将支持Asaph Reinins博士与Susanne von Caemmerer博士在堪培拉的澳大利亚国立大学进行为期22个月的研究。大气二氧化碳（CO2）同位素分析是监测控制全球CO2交换和陆地植物群落净初级生产力（NPP）的生理过程变化的重要工具。 一般来说，光合作用和呼吸作用对大气CO2的同位素特征有着截然不同的影响。 然而，需要详细了解负责CO2同位素鉴别的步骤，以准确区分控制全球CO2交换的过程。 碳酸酐酶（CA）调节C4光合作用，并与大气CO2同位素识别有关。 拟议的研究将利用气体交换和碳/氧同位素测量来研究CA对响应全球气候变化的C4光合作用过程中CO2识别的影响（即，水分胁迫和CO2升高）。 这项研究将提供深入了解C4光合反应，直接影响大气CO2的同位素组成。 更好地了解影响大气CO2同位素组成的酶反应和叶水平气体交换，将允许开发更准确的模型，目前和未来的气候条件。 这些信息将具有深远的意义，进一步提高我们对C4工厂在全球气体交换和NPP中的作用的理解。 冯·凯默勒博士是植物生理学和C4光合作用方面最重要的专家之一。