VIRAL INFECTION OF PICOCYANOBACTERIAE IN THE RYBINSK RESERVOIR DURING THE FREEZE-UP PERIOD
The virioplankton and planktonic picocyanobacteria abundances in the deep and shallow waters of the Rybinsk reservoir during the freeze-up period (the water temperature within 0.3 - 0.9°C) varied within (37.1 - 84.1)×106 ((57.3±2.1)×106 on the average) particles/ml and (13.5 - 75.0)×103 ((48.7±3.4)×103 on the average) cells/ml, respectively. The fraction of picocyanobacteria with viruses attached to their cell surface was 6.5 - 29.0% (12.0±0.8% on the average). The proportion of visible infected cells was 0.7 - 7.6% (2.2±0.3% on the average) of the numbers of picocyanobacteriae. Apparently, viruses play an important role in the picocyanobacteriae abundance regulation during the freeze-up period.
Копылов А. И., Косолапов Д. Б., Заботкина Е. А., Страшкрабова В. Распределение пикоцианобактерий и вириопланктона в мезотрофном и мезоэвтрофном водохранилищах: роль вирусов в смертности пикоцианобактерий // Изв. РАН. Сер. биол. 2010. № 6. С. 661 – 669.
Михеева Т. М. Пико- и нанофитопланктон пресноводных экосистем. Минск : Изд-во Белорус. гос. ун-та, 1998. 196 с.
Callieri C., Stockner J. G. Freshwater autotrophic picoplankton : a review // J. of Limnology. 2002. Vol. 61, № 1. P. 1 – 14.
Maclsaac E. A., Stockner J. G. Enumeration of phototrophic picoplankton by autofluorescence microscopy // Handbook of methods in aquatic microbial ecology. Boca Raton : Lewes Publishers, 1993. P. 187 – 197.
Mann N. H. Phages of the marine cyanobacterial picophytoplankton // FEMS Microbiology Reviews. 2003. Vol. 27, № 1. P. 17 – 34.
Noble R. T., Fuhrman J. A. Use of SYBR Green for rapid epifluorescence count of marine viruses and bacteria // Aquatic Microbial Ecology. 1998. Vol. 14, № 2. P. 113 – 118.
Proctor L. M., Fuhrman J. A. Viral mortality of marine bacteria and cyanobacteria // Nature. 1990. Vol. 343. P. 60 – 62.
Stockner J. G. Autotrophic picoplankton in freshwater ecosystems : the review from the summit // Intern. Review Hydrobiology. 1991. Vol. 76, iss. 4. Р. 483 – 493.
Suttle C. A. Cyanophages // The Ecology of Cyanobacteria : Their Diversity in Time and Space / eds. B. A. Whitton, V. Potts. Dordrecht : Kluwer Academic, 2000. P. 563 – 589.
