Nonlinear dynamics of degradation of Vallisneria spiralis L. chlorophyll photoluminescence at high excitation levels

Open Science Journal

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Field Value
 
Title Nonlinear dynamics of degradation of Vallisneria spiralis L. chlorophyll photoluminescence at high excitation levels
 
Creator Vakulenko, Olegh
Grygorieva, Olesja
 
Subject Physics, Biophysics, Optics
Water plants, Photoinhibition mechanism, Fluorescence intensity, Luminescence efficiency
 
Description In the context of the study of the photoinhibition mechanisms of the higher water plant Vallisneria spiralis L. photosynthetic machinery, the fluorescence intensity degradation of chlorophyll a (687 nm) leaf fragments at photoexcitation levels from 7 to 150 mW/cm2 on the wavelength of 488 nm, is investigated. It is shown that the luminescence efficiency decrease rate cannot be described by simple exponential or hyperbolic dependence. To explain this behavior, a kinetic model accounting for dimerization of luminescent molecules under the influence of excess lighting, is put forward. It is supposed that dimers are not capable to produce luminescence in the determined spectral area and, therefore, to transmit energy to their molecules of a photosystem and, eventually, to the reaction center. This results in a plant’s photosynthetic activity decrease.
 
Publisher Open Science Journal
 
Contributor
 
Date 2018-03-15
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
 
Identifier https://osjournal.org/ojs/index.php/OSJ/article/view/1358
10.23954/osj.v3i1.1358
 
Source Open Science Journal; Vol 3, No 1 (2018): Open Science Journal
2466-4308
 
Language eng
 
Relation https://osjournal.org/ojs/index.php/OSJ/article/view/1358/148
 
Rights Copyright (c) 2018 Open Science Journal
http://creativecommons.org/licenses/by/4.0
 

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