Adaptation of Carbon Source Utilization Patterns of Geobacter metallireducens During Sessile Growth.

ABSTRACT: There are two main strategies known how microorganisms regulate substrate utilization: specialization on one preferred substrate at high concentrations in batch cultures or simultaneous utilization of many substrates at low concentrations in chemostats. However, it remains unclear how microorganisms utilize substrates at low concentrations in the subsurface: do they focus on a single substrate and exhibit catabolite repression or do they de-repress regulation of all catabolic pathways? Here, we investigated the readiness of Geobacter metallireducens to degrade organic substrates under sessile growth in sediment columns in the presence of a mixed community as a model for aquifers. Three parallel columns were filled with sand and flushed with anoxic medium at a constant inflow (18 ml

SUBMITTER: Marozava S 

PROVIDER: S-EPMC7324539 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature