Show simple item record

dc.contributor.authorDeCosta, P.M.
dc.contributor.authorAnil, A.C.
dc.date.accessioned2011-03-30T06:01:00Z
dc.date.available2011-03-30T06:01:00Z
dc.date.issued2011
dc.identifier.citationResearch in Microbiology, vol.162(3); 2011; 292-301
dc.identifier.otherno
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3830
dc.description.abstractTo investigate the effect of bacteria on diatoms at the community level, sediment samples from an intertidal tropical environment were treated with penicillin (a Beta-lactam antibiotic that can affect diatoms only through bacteria). Streptomycin (an aminoglycoside) and chloramphenicol, antibiotics that can potentially affect protein synthesis in diatom organelles and photosynthesis, were also used for comparison. The changes in diatom community structure and the resistant and tolerant bacterial fractions were analyzed through microscopy, culture techniques and denaturing gradient gel electrophoresis. The reduction in bacterial abundance when treated with penicillin resulted in suppression of Amphora coffeaeformis, a dominant diatom in the study area. The bacterial community preferred the ‘tolerance’ strategy over ‘resistance’ in response to treatment with penicillin; these changes in bacterial dynamics were probably linked to concurrent changes in diatom community structure. The observations with penicillin differed from those with streptomycin that did not seem to significantly affect diatoms, and chloramphenicol, which consistently inhibited diatoms. Overall, the results of this study highlight the significance of bacteria in structuring benthic diatom communities and call for the inclusion of the ‘antibiotics’ approach in studies addressing diatom-bacterial interactions at the community level.
dc.language.isoen
dc.publisherElsevier
dc.relation.requiresRes_Microbiol_162_292.jpg
dc.rightsAn edited version of this paper was published by Elsevier. © 2010 Institut Pasteur
dc.subjectdiatoms
dc.subjectcommunity composition
dc.subjectcontrol resistance
dc.subjectantibiotics
dc.subjectAmphora coffeaeformis
dc.titleThe effect of bacteria on diatom community structure - The 'antibiotics' approach
dc.typeJournal Article


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record