US EPA

7446721 

Journal Article 

Correlation between specific groups of heterotrophic bacteria and microcystin biodegradation in freshwater bodies of central Europe 

Dziga, D; Kokociński, M; Barylski, J; Nowicki, G; Maksylewicz, A; Antosiak, A; Banaś, AK; Strzałka, W 

2019 

Yes 

FEMS Microbiology Ecology
ISSN: 0168-6496
EISSN: 1574-6941 

Oxford University Press 

95 

11 

English 

31609415 

10.1093/femsec/fiz162 

WOS:000507366200019 

Microcystins produced by several toxic cyanobacterial strains constitute an important problem for public health. Bacterial degradation of these hepatotoxins may play an important role in natural ecosystems, however the nature of the process is very poorly understood. The aim of our study was to investigate the possible interactions between cyanotoxin producers and degraders. Samples collected from 24 water bodies in western Poland were analysed to determine the chemo-physical parameters, phytoplankton content, bacterial community structure and microcystin-biodegradation potency. A redundancy analysis identified a positive correlation between the capacity of a community to degrade microcystin LR (MC-LR) and temperature, pH, chlorophyll a concentration and the abundance of MC-producers. The relative abundance of classes F38, TM7-3 and the order WCHB1-81c (Actinobacteria) was significantly higher in the lakes with MC-biodegradation potency. Some specific bacterial genera belonging to Acidobacteria, Chloroflexi, Gemmatimonadetes, Firmicutes and TM7 were closely correlated with the occurrence of Microcystis spp. Furthermore, the MC biodegradation process was connected with the same bacterial groups. Thus, our approach allowed us to provide a broader picture of some specific relations between microcystin producers and potential microcystin degraders. A more comprehensive analysis of the existing correlations may be helpful in our understanding of natural mechanisms of MC elimination using bacteria such as MC-degraders. 

bacterial community; biodegradation; cyanobacteria; microcystin; bacterium; biodegradation; freshwater environment; microbial activity; microbial community; physicochemical property; toxin; Poland [Central Europe]; Acidobacteria; Actinobacteria; Bacteria (microorganisms); Chloroflexi; Chloroflexi (class); Cyanobacteria; Firmicutes; Gemmatimonadetes; Microcystis; bacterial toxin; chlorophyll a; microcystin; microcystin LR; bioremediation; cyanobacterium; ecosystem; lake; metabolism; microbiology; Poland; temperature; Bacterial Toxins; Biodegradation, Environmental; Chlorophyll A; Cyanobacteria; Ecosystem; Lakes; Microcystins; Poland; Temperature; Water Microbiology