CLIMATE CHANGE AND THE EVOLUTION OF C4 PHOTOSYNTHESIS
CLIMATE CHANGE AND THE EVOLUTION OF C4 PHOTOSYNTHESIS
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DOI：
10.1016/0169-5347(91)90183-x
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发表时间：
1991-03-01
影响因子：
16.8
通讯作者：
PEARCY, RW
中科院分区：
文献类型：
--
作者：
EHLERINGER, JR;SAGE, RF;PEARCY, RW
植物通过三种光合途径之一吸收碳，通常称为C3，C4和CAM途径。仅在被子植物中发现的C4光合途径代表了C3代谢的一种修饰，在低浓度CO2下最有效。今天，C4植物在炎热、开放的生态系统中最为常见，人们普遍认为它们是在这些条件下进化而来的。然而，高光和高温，本身，是不足以有利于C4光合作用的演变在大气中的CO2水平显着高于目前的环境值。对证据的回顾表明，C4植物的进化是为了应对从白垩纪开始一直持续到中新世的大气CO2水平的降低。
Plants assimilate carbon by one of three photosynthetic pathways, commonly called the C3, C4, and CAM pathways. The C4 photosynthetic pathway, found only among the angiosperms, represents a modification of C3 metabolism that is most effective at low concentrations of CO2. Today, C4 plants are most common in hot, open ecosystems, and it is commonly felt that they evolved under these conditions. However, high light and high temperature, by themselves, are not sufficient to favor the evolution of C4 photosynthesis at atmospheric CO2 levels significantly above the current ambient values. A review of evidence suggests that C4 plants evolved in response to a reduction in atmospheric CO2 levels that began during the Cretaceous and continued until the Miocene.