Enzymatic Regulation of Photosynthetic CO2, Fixation in C3 Plants
Enzymatic Regulation of Photosynthetic CO2, Fixation in C3 Plants
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DOI：
10.1146/annurev.pp.39.060188.002533
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
I. E. Woodrow;J. Berry
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文献类型：
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作者：
I. E. Woodrow;J. Berry
植物叶片光合CO2吸收的生理过程是核酮糖- 1,5 -二磷酸羧化酶/加氧酶（Rubisco）催化反应的表现。在这篇综述中，我们考虑在体内对这些反应施加“局部控制”的代谢和生化因素。调控机制（特别是Rubisco）在这里起着突出的作用，但中心兴趣的现象是光合作用生化过程的整体调控。我们的目标是展示这些影响这种关键酶“局部”控制的机制是如何与光合作用过程中的其他步骤联系在一起的，从而形成“调节se序列”，将羧化和氧化反应的速度与环境的独立因素（例如光的强度或二氧化碳的浓度）联系起来。考虑光合作用的限制因素-一个主要在定性方面考虑的话题。为了促进定量方法应用的自然发展，我们在这一部分的综述中特别关注用于通过共限制因素检查复杂代谢系统控制的定量程序。最后，我们注意到，我们解决这个问题的方法在一定程度上取决于这样一种观点，即通过进化过程，选择光合作用系统是为了有效地利用有限的资源进行初级生产。我们总结了一些一般的方法，其中二氧化碳固定的调节符合这一观点。
The physiological process of photosynthetic CO2 uptake by plant leaves is a manifestation of reactions catalyzed by ribulose-l, 5-bisphosphate carboxyl ase/oxygenase (Rubisco). In this review we consider the metabolic and biochemical factors that exert" local control" over these reactions in vivo. Mechanisms of regulation (particularly of Rubisco) play a prominent role here, but the phenomenon of central interest is the overall regulation of the biochemical process of photosynthesis. Our goal is to show how some of these mechanisms, which effect" local" control of this key enzyme, are linked to other steps in the photosynthetic process, thus forming" regulatory se quences" that connect the velocity of the carboxylation and oxygenation reactions to independent factors of the environment (eg the intensity of light or the concentration of CO2), These sequences bring us, inescapably, to consideration of limiting factors in photosynthesis-a topic that has been considered mostly in qualitative terms. To facilitate a natural progression toward application of quantitative methods we pay particular attention in this part of the review to quantitative procedures that have been used to examine control of complex metabolic systems by co-limiting factors. Finally, we note that our approach to this problem is conditioned in part by the view that, through evolutionary processes, the photosynthetic system has been selected to achieve efficient use of limited resources for primary production. We conclude our review with consideration of some general ways in which the regulation of CO2 fixation conforms to this view.