Abstract
Fluorescence of the marine alga Thalassiosira weissflogii (Grunow) Fryxell et Hasle with open (F o ) and closed (F m ) reaction centers of photosystem 2 (PS 2) and its relative variable fluorescence (F v/F m ) were measured at various levels of inorganic nitrogen. A significant heterogeneity of the population in terms of these parameters was revealed. Some cells within the population were more sensitive to nitrogen deficiency, and their photosynthetic apparatus was disrupted to a greater extent. The cells within a population also differed in terms of their ability to recover after incubation at low nitrogen levels. Enhancement of nitrogen deficiency resulted in an increase in the variability of the F o and F v/F m values of the cells. Fluorescence variability decreased at a less pronounced deficiency. Fluorescence variability should be taken into consideration in the studies concerning responses of algae to changes in nutrient contents.
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Original Russian Text © E.N. Voronova, L.V. Il’ash, S.I. Pogosyan, A.Yu. Ulanova, D. N. Matorin, Man-gi Cho, A.B. Rubin, 2009, published in Mikrobiologiya, 2009, Vol. 78, No. 4, pp. 469–478.
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Voronova, E.N., Il’ash, L.V., Pogosyan, S.I. et al. Intrapopulation heterogeneity of the fluorescence parameters of the marine plankton alga Thalassiosira weissflogii at various nitrogen levels. Microbiology 78, 419–427 (2009). https://doi.org/10.1134/S0026261709040043
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DOI: https://doi.org/10.1134/S0026261709040043