A mechanistic model of algal photoinhibition induced by photodamage to Photosystem-II

doi:10.1006/jtbi.2001.2468

	A mechanistic model of algal photoinhibition induced by photodamage to Photosystem-II
	Han, BP
	2002-02-21
发表期刊	JOURNAL OF THEORETICAL BIOLOGY
ISSN	0022-5193
卷号	214 期号:4 页码:519-527
文章类型	Article
摘要	Photoinhibition is a central problem for the understanding of plasticity in photosynthesis vs. irradiance response. It effectively reduces the photosynthetic rate. In this contribution, we present a mechanistic model of algal photoinhibition induced by photodamage to photosystem-II. Photosystem-IIs (PSIIs) are assumed to exist in three states: open, closed and inhibited. Photosynthesis is closely associated with the transitions between the three states. The present model is defined by four parameters: effective cross section of PSII, number of PSIIs, turnover time of electron transfer chains and the ratio of rate constant of damage to that of repair of D1 proteins in PSIIs. It gives a photosynthetic response curve of phytoplankton to irradiance (PI-curve). Without photoinhibition, the PI-curve is in hyperbola with the first three parameters. The PI-curve with photoinhibition can be simplified to the same form as the hyperbola by replacing either the number of PSIIs with the number of functional PSIIs or the turnover time of electron transfer chains with the average turnover time.; Photoinhibition is a central problem for the understanding of plasticity in photosynthesis vs. irradiance response. It effectively reduces the photosynthetic rate. In this contribution, we present a mechanistic model of algal photoinhibition induced by photodamage to photosystem-II. Photosystem-IIs (PSIIs) are assumed to exist in three states: open, closed and inhibited. Photosynthesis is closely associated with the transitions between the three states. The present model is defined by four parameters: effective cross section of PSII, number of PSIIs, turnover time of electron transfer chains and the ratio of rate constant of damage to that of repair of D1 proteins in PSIIs. It gives a photosynthetic response curve of phytoplankton to irradiance (PI-curve). Without photoinhibition, the PI-curve is in hyperbola with the first three parameters. The PI-curve with photoinhibition can be simplified to the same form as the hyperbola by replacing either the number of PSIIs with the number of functional PSIIs or the turnover time of electron transfer chains with the average turnover time.
关键词	Phytoplankton Photosynthesis Light-intensity Dynamic-model Marine-phytoplankton Natural Assemblages Electron-transport Photoinactivation Growth Productivity Fluorescence
学科领域	Biology ; Mathematical & Computational Biology
DOI	10.1006/jtbi.2001.2468
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000174260400001
引用统计	被引频次：79[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/337002/2816
专题	海洋生态与环境科学重点实验室
作者单位	1.Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Peoples R China 2.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Han, BP. A mechanistic model of algal photoinhibition induced by photodamage to Photosystem-II[J]. JOURNAL OF THEORETICAL BIOLOGY,2002,214(4):519-527.
APA	Han, BP.(2002).A mechanistic model of algal photoinhibition induced by photodamage to Photosystem-II.JOURNAL OF THEORETICAL BIOLOGY,214(4),519-527.
MLA	Han, BP."A mechanistic model of algal photoinhibition induced by photodamage to Photosystem-II".JOURNAL OF THEORETICAL BIOLOGY 214.4(2002):519-527.

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