Tolerance of the photosynthetic apparatus to acidification of the growth medium as a possible determinant of CO2-tolerance of the symbiotic microalga Desmodesmus sp. IPPAS-2014
- Authors: Ptushenko V.V.1,2, Solovchenko A.E.3,4
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Affiliations:
- Lomonosov Moscow State University, Belozersky Research Institute of Physico-Chemical Biology
- Emanuel Institute of Biochemical Physics
- Lomonosov Moscow State University, Faculty of Biology
- Timiryazev Institute of Plant Physiology
- Issue: Vol 81, No 12 (2016)
- Pages: 1531-1537
- Section: Regular Papers
- URL: https://journals.rcsi.science/0006-2979/article/view/151162
- DOI: https://doi.org/10.1134/S0006297916120142
- ID: 151162
Cite item
Abstract
The symbiotic unicellular chlorophyte Desmodesmus sp. IPPAS-2014 capable of growth at extremely high CO2 levels prohibitive for most other microalgae is an interesting model for studies of CO2 tolerance mechanisms and a promising organism for CO2 biocapture. We studied the initial (0-60 min) phase of acclimation of this microalga to an abrupt decrease in pH of the medium sparged with air/20% CO2 mixture. Acclimation of the culture to these conditions was accompanied by a sharp decrease in photochemical activity of the chloroplast followed by its recovery with a characteristic time of 10-50 min. We hypothesize that acidification of the cultivation medium by dissolving CO2 plays a key role in the observed decrease in the photochemical activity. The possible role of photosynthetic apparatus tolerance to abrupt acidification in overall high tolerance of symbiotic microalgae to extremely high CO2 levels is discussed.
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About the authors
V. V. Ptushenko
Lomonosov Moscow State University, Belozersky Research Institute of Physico-Chemical Biology; Emanuel Institute of Biochemical Physics
Email: solovchenko@mail.bio.msu.ru
Russian Federation, Moscow, 119991; Moscow, 119334
A. E. Solovchenko
Lomonosov Moscow State University, Faculty of Biology; Timiryazev Institute of Plant Physiology
Author for correspondence.
Email: solovchenko@mail.bio.msu.ru
Russian Federation, Moscow, 119991; Moscow, 127276