[Bacterial processes of photosynthesis and dark assimilation of carbon dioxide in the lakes of Bunger Hills Oasis in Eastern Antarctica].
Photosynthetic and dark assimilation of carbon dioxide was studied in both perennially and temporarily ice-covered lakes of the antarctic oasis Bunger Hills. The intensity of these processes in the lakes studied varied from 0.08 to 326 mg C/(m3 day) and correlated with water mineralization. Irrespective of the character of ice-cover, a chemical composition of water in antarctic water ecosystems affected the organic matter photo-production to a greater extent than the intensity of photosynthetically available radiation. With the method of polymerase chain reaction, the predominance of oxygenic phototrophic microorganisms carrying RuBisCo genes was revealed in all the lakes examined. The results obtained and the literature data unambiguously point to the photosynthetic production of organic matter by cyanobacteria as the main biogeochemical process that determines all the other metabolic strategies in antarctic water ecosystems studied hitherto.
Gal'chenko
V F
VF
Bol'shiianov
D Iu
DIu
Chernykh
N A
NA
Andersen
D
D
D000864:Antarctic Regions; D001419:Bacteria / Q000235:genetics / Q000378:metabolism; D018407:Bacterial Physiological Phenomena; D001483:Base Sequence; D002245:Carbon Dioxide / Q000378:metabolism*; D017931:DNA Primers; D003624:Darkness; D008969:Molecular Sequence Data; D010788:Photosynthesis; D012273:Ribulose-Bisphosphate Carboxylase / Q000235:genetics; D014871:Water Microbiology
D017931:DNA Primers; D002245:Carbon Dioxide; D012273:Ribulose-Bisphosphate Carboxylase
Bakterial'nye protsessy fotosinteza i temnovoĭ assimiliatsii uglekisloty v ozerakh oazisa banger khills, vostochnaia Antarktida.