Open AccessMycrocystin-LR degradation by indigenous bacterial community of Rybinsk Reservoir
Author(s) -
Н. Г. Медведева,
И. Л. Кузикова
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/834/1/012066
Subject(s) - biodegradation , 16s ribosomal rna , bacteria , microcystin lr , biology , degradation (telecommunications) , microbial population biology , microbiology and biotechnology , microcystin , bloom , environmental chemistry , chemistry , ecology , cyanobacteria , genetics , telecommunications , computer science
The fate of microcystin-LR (MC-LR) in water samples of Rybinsk Reservoir taken before and during water bloom was assessed. The decrease in the MC-LR concentration in the both samples was due to its biodegradation by indigenous bacterial community. The highest biodegradation rate and shortest half-life of MC-LR in the water sample taken during water bloom were observed. A microcystin degrading bacterium was isolated and shown be 98.92% similar to Sphingopyxis sp . based on a fragment of 16S rRNA gene sequence. The rate of MC-LR biodegradation by Sphingopyxis sp . S7 was strongly dependent on initial concentration of toxin and temperature.