Analytical model of ion transport and conversion of light energy in chloroplasts / Melkikh Alexey V.,Seleznev Vladimir D.,Chesnokova Oksana I. // JOURNAL OF THEORETICAL BIOLOGY. - 2010. - V. 264, l. 3. - P. 702-710.

ISSN/EISSN:

0022-5193 / нет данных

Type:

Article

Abstract:

An analytical model, which describes the stationary transformation of light energy to the energy of pigment electronic excitation, has been constructed. A proton pump of the thylakoid membrane has been considered as a two-level conformon. The difference between the energies of the excited and ground states of both the pigment and the protein complex is assumed to be the energy of an absorbed photon. It has been found how the concentration of ions in a lumen and the potential across the thylakoid membrane depend on the concentration of ions in the stroma and the brightness temperature of absorbed radiation. Conditions for the maximum efficiency of the photosynthesis process have been analyzed. This model has been used to determine the electric potential (phi approximate to 6.7 mV) at the chloroplast thylakoid membrane. The calculated value of the electric potential is in good agreement with the experimental data. A limitation on the stoichiometric coefficient of the proton transport through ATP-synthase, m > 3, has been found theoretically. (C) 2010 Elsevier Ltd. All rights reserved.

Author keywords:

Photosynthesis; Energy conversion; Active transport of ions; Resting potential NEGATIVE ENTROPY PRODUCTION; ACTIVE-TRANSPORT; PHOTOSYNTHESIS; THERMODYNAMICS; BIOMEMBRANES

DOI:

10.1016/j.jtbi.2010.04.002

Web of Science ID:

ISI:000281460900007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 7
Publisher	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Address	24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
Language	English
Keywords-Plus	NEGATIVE ENTROPY PRODUCTION; ACTIVE-TRANSPORT; PHOTOSYNTHESIS; THERMODYNAMICS; BIOMEMBRANES
Research-Areas	Life Sciences \& Biomedicine - Other Topics; Mathematical \& Computational Biology
Web-of-Science-Categories	Biology; Mathematical \& Computational Biology
Author-Email	melkikh2008@rambler.ru
Number-of-Cited-References	32
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	19
Journal-ISO	J. Theor. Biol.
Doc-Delivery-Number	645LY