Organohalide-Respiring Bacteria by Lorenz Adrian & Frank E. Löffler

Author:Lorenz Adrian & Frank E. Löffler
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

14.3.2 Toxins and Inhibitors

O2 scavenging

Another benefit of growth in mixed culture for the obligate OHRB is that of O2 scavenging when the community is exposed to oxygen . Organohalide-respiring communities may contain organisms that use O2 for respiration as well as organisms that possess detoxification pathways for dealing with reactive oxygen species. Comparing the metagenomes of three chlorinated ethene-respiring communities, many orthologs of superoxide dismutase were found from multiple genera in each community (Hug et al. 2012). One of the facultative OHRB, Anaeromyxobacter dehalogenans, is actually a microaerophile (Thomas et al. 2008). The ability to deplete oxygen in cultures is reliant upon sufficient reduced substrates (which can even include dead biomass).

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