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

利用氢、碳同位素分馏分析光合作用初级过程的机制。光合作用中CO2固定和还原的主要过程在有机物的同位素组成中留下了它们的特征。虽然这些特征在地球化学、生物学和气候学中被广泛用于推断生物圈的动态和历史，但它们提供的关于产生这些特征的过程机制的信息尚未得到充分利用。我们建议映射的基本生物化学负责分馏的氢同位素，以评估其能力，以表明水的植物关系，并使用碳同位素歧视探测的催化化学的CO2固定酶，Rubisco。

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