The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research

文献类型： 外文期刊

第一作者： Shi, Tongxin

作者： Shi, Tongxin;Fan, Dayong;Xu, Chengyang;Feng, Fei;Zheng, Guoming;Zhong, Chuanfei;Chow, Wah Soon

作者机构：

关键词： connectivity among PSII complexes; differential equation of Q(A) reduction kinetics; functional absorption cross-section of PSII; heat stability of PSII; UHI

期刊名称：PLANTS-BASEL （ 影响因子：4.0； 五年影响因子：4.4 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 3 期

页码：

收录情况： SCI

摘要： Chlorophyll (Chl) fluorescence induction (FI) upon a dark-light transition has been widely analyzed to derive information on initial events of energy conversion and electron transfer in photosystem II (PSII). However, currently, there is no analytical solution to the differential equation of Q(A) reduction kinetics, raising a doubt about the fitting of FI by numerical iteration solution. We derived an analytical solution to fit the OJ phase of FI, thereby yielding estimates of three parameters: the functional absorption cross-section of PSII (sigma(PSII)), a probability parameter that describes the connectivity among PSII complexes (p), and the rate coefficient for Q(A)(-) oxidation (k(ox)). We found that sigma(PSII), p, and k(ox) exhibited dynamic changes during the transition from O to J. We postulated that in high excitation light, some other energy dissipation pathways may vastly outcompete against excitation energy transfer from a closed PSII trap to an open PSII, thereby giving the impression that connectivity seemingly does not exist. We also conducted a case study on the urban heat island effect on the heat stability of PSII using our method and showed that higher-temperature-acclimated leaves had a greater sigma(PSII), lower k(ox), and a tendency of lower p towards more shade-type characteristics.

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