On the 16O/18O isotope effect associated with photosynthetic O2 production.
On the 16O/18O isotope effect associated with photosynthetic O2 production.
复制标题
与光合作用 O2 产生相关的 16O/18O 同位素效应。
作者：
G. Tcherkez;G. Farquhar
虽然光合作用演化出的 O2 已被反复证明与源水具有几乎相同的氧同位素组成，因此不存在相应的 16O/18O 同位素效应，但最近的一些 18O 富集研究表明可能会发生较大的同位素效应，从而引发了文献中的争论。在这里，应用同位素效应的经典理论来表明，在 O2 生产过程中确实预计会出现非常小的同位素效应。简要讨论了相互矛盾的结果的解释。
While photosynthetically evolved O2 has been repeatedly shown to have nearly the same oxygen isotope composition as source water so that there is no corresponding 16O/18O isotope effect, some recent 18O-enrichment studies suggest that a large isotope effect may occur, thus feeding a debate in the literature. Here, the classical theory of isotope effects was applied to show that a very small isotope effect is indeed expected during O2 production. Explanations of the conflicting results are briefly discussed.