Saxitoxin-Producing Cyanobacteria in Lake Baikal
O. I. BELYKH, A. S. GLADKIKH, E. G. SOROKOVIKOVA, I. V. TIKHONOVA, S. A. POTAPOV, T. V. BUTINA
Limnological Institute SB RAS, 664033, Irkutsk, Ulan-Batorskaya str., 3
Keywords: Lake Baikal, cyanobacteria, pyrosequencing, saxitoxin, sxtA-gene, ELISA
Abstract
Cyanobacteria containing neurotoxic saxitoxin synthesis genes were found in the coastal zone of Lake Baiakl near the village Turka for the first time. Phylogenetic analysis showed that the sequences of saxitoxin synthesis genes belong to the genus Anаbaenа Bory. Saxitoxin concentration in the water according to ELISA was 1.93 ± 0.64 mg/l. Genetic and taxonomic composition of the bacterial community of the Central part (basin) of Lake Baikal was characterized using 16S rRNA gene pyrosequencing. It was established that phylum Cyanobacteria dominated in the composition of summer bacterioplankton in both littoral and pelagic zones of the lake, but higher species diversity was noted in the plankton of littoral zone.
|
