Estimation of heterogeneity of photosystem II complexes of Chlorella vulgaris algae cells under nitrogen starvation using a mathematical model
https://doi.org/10.55959/MSU0137-0952-16-80-3-6
Abstract
The study of microalgae cell responses to stress factors such as mineral nutrient deficiency is an important ecological task. Changes in the photosynthetic apparatus are reflected in the kinetics of experimentally measured chlorophyll fluorescence induction curves. Various mathematical methods are developed to analyze changes in the shape of curves, allowing rapid analysis of a large number of curves. The paper demonstrates the use of a simple mathematical model of photosystem II (PSII) to assess changes in the PSII parameters of a Chlorella vulgaris microalgae cell culture growing under nitrogen deficiency in the medium. The model describes transitions between three key PSII states that differ in the oxidation state of its components. The mathematical model revealed an increase in the proportion of reaction centers containing smaller antennae, as well as an increase in the proportion of inactive oxygen-releasing complexes.
Keywords
mathematical model,
photosystem II heterogeneity,
photosynthesis,
chlorophyll fluorescence,
nitrogen starvation,
antenna complex,
oxygen-evolving complex.
Supporting agencies: This study was performed under the state assignment of Lomonosov Moscow State University.
About the Authors
R. N. Chervitsov
Department of Biophysics, School of Biology, Lomonosov Moscow State University
Russian Federation
Russian Federation
1–24 Leninskie gory, Moscow, 119234
S. S. Khruschev
Department of Biophysics, School of Biology, Lomonosov Moscow State University
Russian Federation
Russian Federation
1–24 Leninskie gory, Moscow, 119234
P. V. Fursova
Department of Biophysics, School of Biology, Lomonosov Moscow State University
Russian Federation
Russian Federation
1–24 Leninskie gory, Moscow, 119234
T. Yu. Plyusnina
Department of Biophysics, School of Biology, Lomonosov Moscow State University
Russian Federation
Russian Federation
1–24 Leninskie gory, Moscow, 119234
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For citations:
Chervitsov R.N., Khruschev S.S., Fursova P.V., Plyusnina T.Yu. Estimation of heterogeneity of photosystem II complexes of Chlorella vulgaris algae cells under nitrogen starvation using a mathematical model. Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2025;80(3):190-196. (In Russ.) https://doi.org/10.55959/MSU0137-0952-16-80-3-6
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