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Title: Carbon source utilization profiles suggest additional metabolic interactions in a synergistic linuron degrading bacterial consortium
Authors: Horemans, Benjamin ×
Smolders, Erik
Springael, Dirk #
Issue Date: Apr-2013
Publisher: Published by Elsevier Science Publishers on behalf of the Federation of European Microbiological Societies
Series Title: FEMS Microbiology Ecology vol:84 issue:1 pages:24-34
Abstract: Dissolved organic matter (DOM) is the primary environmental carbon source
for heterotrophic bacteria and its quality and quantity have been shown to
affect microbial community structure and functioning. In that context, it was
examined whether a bacterial consortium synergistically degrading the herbicide
linuron extends this synergism toward natural DOM degradation. Biodegradable
dissolved organic carbon (BDOC) of DOM of various origins and
concomitant growth was determined for the consortium members in isolation
and in combination. BDOC decreased with increasing DOM aromaticity, which
is a recalcitrance indicator. BDOC in DOM of low aromaticity was 40–50% for
all inocula. For DOM with high aromaticity, BDOC decreased with increasing
aromaticity and was inoculum dependent, that is, BDOC was > 23% for consortium
members in combination compared with BDOC < 16% for isolated
strains. The observed BDOC and growth indicated that synergism existed
within the consortium for degradation of DOM of both low and high aromaticity.
All members benefited from this synergism as growth of all strains
increased when incubated in combination, but their relative growth benefit
depended on DOM composition. These data suggest that consortia benefit
more than individual pesticide degraders from environmental DOM due to
cooperation. This is important to understand the effects of DOM on stability
and activity of pollutant-degrading consortia.
ISSN: 0168-6496
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division Soil and Water Management
× corresponding author
# (joint) last author

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