On the approaches applied in formulation of a kinetic model of photosystem II: Different approaches lead to different simulations of the chlorophyll a fluorescence transients

塑料醌 光系统II 析氧络合物 化学 析氧 希尔反应 荧光 动能 叶绿素荧光 电子传输链 电子受体 叶绿素 生物系统 光合作用 光化学 化学物理 物理 类囊体 叶绿体 生物 物理化学 生物化学 电极 量子力学 有机化学 电化学 基因
作者
Dušan Lazár,Jiří Jablonský
出处
期刊:Journal of Theoretical Biology [Elsevier BV]
卷期号:257 (2): 260-269 被引量:46
标识
DOI:10.1016/j.jtbi.2008.11.018
摘要

Chlorophyll a fluorescence rise (O–J–I–P transient) was in literature simulated using models describing reactions occurring solely in photosystem II (PSII) and plastoquinone (PQ) pool as well as using complex models which described, in addition to the above, also subsequent electron transport occurring beyond the PQ pool. However, there is no consistency in general approach how to formulate a kinetic model and how to describe particular reactions occurring even in PSII only. In this work, simple kinetic PSII models are considered always with the same electron carriers and same type of reactions but some reactions are approached in different ways: oxygen evolving complex is considered bound to PSII or "virtually" separated from PSII; exchange of doubly reduced secondary quinone PSII electron acceptor, QB, with PQ molecule from the PQ pool is described by one second order reaction or by two subsequent reactions; and all possible reactions or only those which follow in logical order are considered. By combining all these approaches, eight PSII models are formulated which are used for simulations of the chlorophyll a fluorescence transients. It is shown that the different approaches can lead to qualitatively different results. The approaches are compared with other models found elsewhere in the literature and therefore this work can help the readers to better understand the other models and their results.
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