Linking temporal changes in bacterial community structures with the detection and phylogenetic analysis of neutral metalloprotease genes in the sediments of a hypereutrophic lake.

ABSTRACT: We investigated spatial and temporal variations in bacterial community structures as well as the presence of three functional proteolytic enzyme genes in the sediments of a hypereutrophic freshwater lake in order to acquire an insight into dynamic links between bacterial community structures and proteolytic functions. Bacterial communities determined from 16S rRNA gene clone libraries markedly changed bimonthly, rather than vertically in the sediment cores. The phylum Firmicutes dominated in the 4-6 cm deep sediment layer sample after August in 2007, and this correlated with increases in interstitial ammonium concentrations (p < 0.01). The Firmicutes clones were mostly composed of the genus Bacillus. npr genes encoding neutral metalloprotease, an extracellular protease gene, were detected

SUBMITTER: Tsuboi S 

PROVIDER: S-EPMC4159043 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature