The dependence of phytoplankton fluorescence on the thermal stress factor

• Published in: Biophysics (Oxford) Vol. 61; no. 1; pp. 73 - 77
• Main Authors: Voznesenskiy, S. S., Popik, A. Yu, Gamayunov, E. L., Markina, Z. V., Orlova, T. Y.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2016; Springer Nature B.V
• Subjects: Algae; Biological and Medical Physics; Biophysics; Cell Biophysics; Fluorescence; Physics; Physics and Astronomy; Plankton; microalgae; phytoplankton; laser-induced fluorescence; thermal stress factor
• ISSN: 0006-3509; 1555-6654
• DOI: 10.1134/S0006350916010267

The results of a study of the temperature dependence of laser-induced fluorescence for four marine microalgae cultures that belonging to different taxonomic groups are described. The fluorescent properties of microalgae that were exposed to temperature stress up to irreversible changes in their cells have been examined. A comparative analysis has been performed and the models for the dependence of laser-induced fluorescence intensity on the temperature for the microalgal cell pigments have been constructed. The microalgae differ in both their dependence of fluorescence intensity on the thermal stress factor and the stress temperature value, which suggests that these characteristics are species specific.