Variability of the portion of functional PS2 reaction centres in the light of a fluorometric study

• Autorzy: Ficek D. , Ostrowska M. , Kuzio M. , Pogosyan S. I.
• Języki publikacji: EN

Abstrakty

EN

The paper contains a preliminary analysis of the links between the portion fc of functional PS2 reaction centres in the photosynthetic apparatus of marine phytoplankton and environmental factors. The analysis is based inter alia on fluorometric measurements of fc (see Kolber & Falkowski 1993) in water sampled from different depths and trophic types of sea. From the statistical generalisations was derived an analytical form of the relationship between fc, and the optical depth and trophic type of sea (the trophicity index was taken to be the surface concentration of chlorophyll a). According to this relationship, fc rises as the trophicity of the sea does so. Moreover, there is a certain optimal optical depth for each type of water at which the number of functional PS2 reaction centres reaches a maximum. Above or below this depth the value of fc falls. At the present stage of investigations it seems reasonable to assume that this drop in the number of functional PS2 reaction centres close to the surface is due to the destructive effect of excessive irradiance. On the other hand, their reduced number at greater depths, below the fc maximum, can be attributed to the deficit of light and the consequent destruction of reaction centres.

Słowa kluczowe

EN

quantum yield of photosynthesis; portion of functional PS2 reaction centres; fluorometric method

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2000
• Tom: No. 42 (2)
• Strony: 243--250
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr.

Twórcy

autor

Ficek D.

• Institute of Physics, Pedagogical University

autor

Ostrowska M.

• Institute of Oceanology, Polish Academy of Sciences

autor

Kuzio M.

• Institute of Physics, Pedagogical University

autor

Pogosyan S. I.

• Department of Biophysics, Faculty of Biology, Moscow State University

• Institute of Physics, Pedagogical University, Arciszewskiego 22 B, PL-76-200 Słupsk, Poland,

Bibliografia

• 1. Babin M., Morel A., Claustre H., Bricaud A., Kolber Z., Falkowski P. G., 1996, Nitrogen- and irradiance-dependent variations of the maximum quantum yield of carbon fixation in eutrophic, mesotrophic and oligotrophic marine systems, Deep-Sea Res., 43, 1241-1272.
• 2. Clayton R. K., 1980, Photosynthesis: physical mechanisms and chemical patterns, Cambridge Univ. Press, London–New York, 350 pp., (the authors used the Russian translation).
• 3. Kolber Z., Falkowski P. G., 1993, Use of active fluorescence to estimate phytoplankton photosynthesis ‘in situ’, Limnol. Oceanogr., 38 (8), 1646-1665.
• 4. Strickland J. D. H., Parsons T. R., 1968, A practical handbookof seawater analysis. Pigment analysis, Bull. Fish. Res. Bd. Can., 167, 1-311.
• 5. Vedernikov V. I., Vshyntsev V. S., Demidov A. A., Pogosyan S. I., Sukhanova I. N., Fadeyev V. V., Chekaluk A. M., 1990, Using fluorometric and photometric methods for chlorophyll a studying in the BlackSea in spring 1988, Okeanologiya, 30, 848-854, (in Russian).
• 6. Woźniak B., Dera J., 2000, Luminescence and photosynthesis of marine phytoplankton – a brief presentation of new results, Oceanologia, 42 (2), 137-156.
• 7. Woźniak B., Hapter R., Maj B., 1983, The inflow of solar energy and the irradiance of the euphotic zone in the region of Ezcurra Inlet during the Antarctic summer of 1977/78, Oceanologia, 15, 141-174.
• 8. Woźniak B., Montwiłł K., 1973, Methods and techniques of optical measurements in the sea, Stud. i Mater. Oceanol., 7, 71-108, (in Polish).