Linking microbial community function to phylogeny of sulfate-reducing Deltaproteobacteria in marine sediments by combining stable isotope probing with magnetic-bead capture hybridization of 16S rRNA.

ABSTRACT: We further developed the stable isotope probing, magnetic-bead capture method to make it applicable for linking microbial community function to phylogeny at the class and family levels. The main improvements were a substantial decrease in the protocol blank and an approximately 10-fold increase in the detection limit by using a micro-elemental analyzer coupled to isotope ratio mass spectrometry to determine (13)C labeling of isolated 16S rRNA. We demonstrated the method by studying substrate utilization by Desulfobacteraceae, a dominant group of complete oxidizing sulfate-reducing Deltaproteobacteria in marine sediments. Stable-isotope-labeled [(13)C]glucose, [(13)C]propionate, or [(13)C]acetate was fed into an anoxic intertidal sediment. We applied a nested set of three biotin-labeled oli

SUBMITTER: Miyatake T 

PROVIDER: S-EPMC2725495 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature