Presence or Absence of mlr Genes and Nutrient Concentrations Co-Determine the Microcystin Biodegradation Efficiency of a Natural Bacterial Community.

ABSTRACT: The microcystin biodegradation potential of a natural bacterial community coexisting with a toxic cyanobacterial bloom was investigated in a water reservoir from central Spain. The biodegradation capacity was confirmed in all samples during the bloom and an increase of mlrA gene copies was found with increasing microcystin concentrations. Among the 24 microcystin degrading strains isolated from the bacterial community, only 28% showed presence of mlrA gene, strongly supporting the existence and abundance of alternative microcystin degradation pathways in nature. In vitro degradation assays with both mlr⁺ and mlr^- bacterial genotypes (with presence and absence of the complete mlr gene cluster, respectively) were performed with four isolated stra

SUBMITTER: Lezcano MA 

PROVIDER: S-EPMC5127115 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature