Simulation of a nonphotochemical quenching in plant leaf under different light intensities

Publication date: Available online 9 December 2019Source: Biochimica et Biophysica Acta (BBA) - BioenergeticsAuthor(s): Ekaterina Sukhova, Andrey Khlopkov, Vladimir Vodeneev, Vladimir SukhovAbstractAn analysis of photosynthetic response on action of stressors is an important problem, which can be solved by experimental and theoretical methods, including mathematical modeling of photosynthetic processes. The aim of our work was elaboration of a mathematical model, which simulated development of a nonphotochemical quenching under different light conditions. We analyzed two variants of the model: the first variant included a light-induced activation of the electron transport chain; in contrast, the second variant did not describe this activation. Both variants of the model described interactions between transitions from open reaction centers to closed ones (and vice versa) and development of the nonphotochemical quenching. Investigation of both variants of the model showed well qualitative and quantitative accordance between simulated and experimental changes in coefficient of the nophotochemical quenching which were analyzed under different light regimes: (i) the stepped increase of the light intensity without dark intervals between steps, (ii) periodical illuminations by different light intensities with constant durations which were separated by constant dark intervals, and (iii) periodical illuminations by the constant light intensity with different durations which were separ...

Source: Biochimica et Biophysica Acta (BBA) Bioenergetics - December 9, 2019 Category: Biochemistry Source Type: research