Journal
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 73, Issue 6, Pages 2024-2028Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.02190-06
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A steep oxygen gradient and the presence of methane render the hindgut internal periphery of termites a potential habitat for aerobic methane-oxidizing bacteria. However, methane emissions of various termites increased, if at all, only slightly when termites were exposed to an anoxic (nitrogen) atmosphere, and (CH4)-C-14 added to the air headspace over live termites was not converted to (CO2)-C-14. Evidence for the absence of methane oxidation in living termites was corroborated by the failure to detect pmoA, the marker gene for particulate methane monooxygenase, in hindgut DNA extracts of all termites investigated. This adds robustness to our concept of the degradation network in the termite hindgut and eliminates the gut itself as a potential sink of this important greenhouse gas.
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