Walking the tightrope of bioavailability: growth dynamics of PAH degraders on vapour-phase PAH.

ABSTRACT: Microbial contaminant degradation may either result in the utilization of the compound for growth or act as a protective mechanism against its toxicity. Bioavailability of contaminants for nutrition and toxicity has opposite consequences which may have resulted in quite different bacterial adaptation mechanisms; these may particularly interfere when a growth substrate causes toxicity at high bioavailability. Recently, it has been demonstrated that a high bioavailability of vapour-phase naphthalene (NAPH) leads to chemotactic movement of NAPH-degrading Pseudomonas putida (NAH7) G7 away from the NAPH source. To investigate the balance of toxic defence and substrate utilization, we tested the influence of the cell density on surface-associated growth of strain PpG7 at different positions in v

SUBMITTER: Hanzel J 

PROVIDER: S-EPMC3815274 | biostudies-literature | 2012 Jan

REPOSITORIES: biostudies-literature