Flavobacterium johnsoniae as a model organism for characterizing biopolymer utilization in oligotrophic freshwater environments.

ABSTRACT: Biopolymers are important substrates for heterotrophic bacteria in oligotrophic freshwater environments, but information on bacterial growth kinetics with biopolymers is scarce. The objective of this study was to characterize bacterial biopolymer utilization in these environments by assessing the growth kinetics of Flavobacterium johnsoniae strain A3, which is specialized in utilizing biopolymers at μg liter(-1) levels. Growth of strain A3 with amylopectin, xyloglucan, gelatin, maltose, or fructose at 0 to 200 μg C liter(-1) in tap water followed Monod or Teissier kinetics, whereas growth with laminarin followed Teissier kinetics. Classification of the specific affinity of strain A3 for the tested substrates resulted in the following affinity order: laminarin (7.9 × 10(-2) liter·μg(-1) of

SUBMITTER: Sack EL 

PROVIDER: S-EPMC3187107 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature