Photosynthesis-irradiance response at physiological level: A mechanistic model

doi:10.1006/jtbi.2001.2413

	Photosynthesis-irradiance response at physiological level: A mechanistic model
	Han, BP
	2001-11-21
发表期刊	JOURNAL OF THEORETICAL BIOLOGY
ISSN	0022-5193
卷号	213 期号:2 页码:121-127
文章类型	Article
摘要	A mechanistic model is developed to present the photosynthetic response of phytoplankton to irradiance at the physiological level. The model is operated on photosynthetic units (PSU), and each PSU is assumed to have two states: reactive and activated. Light absorption that drives a reactive PSU into the activated state results from the effective absorption of the PSU. Transitions between the two states are asymmetrical in rate. A PSU in the reactive state becomes activated much faster than it recovers from the activated state to the reactive one. The turnover time for an activated PSU to transit into the reactive one is defined by the turnover time of the electron transport chain. The present model yields a photosynthesis-irradiance curve (PE-curve) in a hyperbola, which is described by three physiological parameters: effective cross-section (sigma (PSII)), turnover time of electron transport chain (tau) and number of PSUs (N). The PE-curve has an initial slope of sigma (PSII) x N, a half-saturated irradiance of 1/(sigma (PSII)), and a maximal photosynthetic rate of Nlc at the saturated irradiance. The PE-curve from the present model is comparable to the empirical function based on the target theory described by the Poisson distribution. (C) 2001 Academic Press.; A mechanistic model is developed to present the photosynthetic response of phytoplankton to irradiance at the physiological level. The model is operated on photosynthetic units (PSU), and each PSU is assumed to have two states: reactive and activated. Light absorption that drives a reactive PSU into the activated state results from the effective absorption of the PSU. Transitions between the two states are asymmetrical in rate. A PSU in the reactive state becomes activated much faster than it recovers from the activated state to the reactive one. The turnover time for an activated PSU to transit into the reactive one is defined by the turnover time of the electron transport chain. The present model yields a photosynthesis-irradiance curve (PE-curve) in a hyperbola, which is described by three physiological parameters: effective cross-section (sigma (PSII)), turnover time of electron transport chain (tau) and number of PSUs (N). The PE-curve has an initial slope of sigma (PSII) x N, a half-saturated irradiance of 1/(sigma (PSII)), and a maximal photosynthetic rate of Nlc at the saturated irradiance. The PE-curve from the present model is comparable to the empirical function based on the target theory described by the Poisson distribution. (C) 2001 Academic Press.
关键词	Photosystem-ii Dynamic-model Steady-state Phytoplankton Light Growth Photoinhibition Photoadaptation Absorption Curve
学科领域	Biology ; Mathematical & Computational Biology
DOI	10.1006/jtbi.2001.2413
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000172346400001
引用统计	被引频次：54[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2828
专题	海洋生态与环境科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China 2.Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Peoples R China
推荐引用方式 GB/T 7714	Han, BP. Photosynthesis-irradiance response at physiological level: A mechanistic model[J]. JOURNAL OF THEORETICAL BIOLOGY,2001,213(2):121-127.
APA	Han, BP.(2001).Photosynthesis-irradiance response at physiological level: A mechanistic model.JOURNAL OF THEORETICAL BIOLOGY,213(2),121-127.
MLA	Han, BP."Photosynthesis-irradiance response at physiological level: A mechanistic model".JOURNAL OF THEORETICAL BIOLOGY 213.2(2001):121-127.

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