Using the fractionation of hydrogen and carbon isotopes to analyse the mechanisms of the primary processes of photosynthesis.

利用氢和碳同位素的分馏来分析光合作用初级过程的机制。

• 批准号: DP0344142
• 负责人: Prof Graham Farquhar
• 金额: $ 25.13万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0344142
• 关键词: Using; fractionation; hydrogen; carbon; isotopes

The primary processes of CO2 fixation and reduction in photosynthesis leave their signatures in the isotopic composition of organic matter. Although these signatures are used widely in geochemistry, biology and climatology to infer the dynamics and history of the biosphere, the information they provide about the mechanisms of the processes that produce them has not been exploited fully. We propose to map the underlying biochemistry responsible for fractionation of hydrogen isotopes, to assess its ability to indicate the water relations of plants, and to use carbon-isotope discrimination to probe the catalytic chemistry of the CO2-fixing enzyme, Rubisco.

二氧化碳固定和光合作用减少的主要过程将其特征留在有机物的同位素组成中。尽管这些签名在地球化学，生物学和气候学上广泛使用，以推断生物圈的动态和历史，但它们提供的有关生产过程的机制的信息尚未得到充分利用。我们建议绘制负责氢同位素分馏的基本生物化学，以评估其指示植物的水关系的能力，并使用碳 - 异位歧视来探测CO2固定酶的催化化学反应Rubisco，Rubisco。