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Applied and Environmental Microbiology
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General Microbial Ecology

Uric Acid-Degrading Bacteria in Guts of Termites [Reticulitermes flavipes (Kollar)]

C. J. Potrikus, John A. Breznak
C. J. Potrikus
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ABSTRACT

Uricolytic bacteria were present in guts of Reticulitermes flavipes in populations up to 6 × 104 cells per gut. Of 82 strains isolated under strict anaerobic conditions, most were group N Streptococcus sp., Bacteroides termitidis, and Citrobacter sp. All isolates used uric acid (UA) as an energy source anaerobically, but not aerobically, and NH3 was the major nitrogenous product of uricolysis. However, none of the isolates had an absolute requirement for UA. Utilization of heterocyclic compounds other than UA was limited. Fresh termite gut contents also degraded UA anaerobically, as measured by 14CO2 evolution from [2-14C]UA. The magnitude of anaerobic uricolysis [0.67 pmol of UA catabolized/(gut × h)] was entirely consistent with the population density of uricolytic bacteria in situ. Uricolytic gut bacteria may convert UA in situ to products usable by termites for carbon, nitrogen, energy, or all three. This possibility is consistent with the fact that R. flavipes termites from UA, but they do not void the purine in excreta despite the lack of uricase in their tissues.

FOOTNOTES

  • ↵† Journal article no. 9312 from the Michigan Agricultural Experiment Station.

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Uric Acid-Degrading Bacteria in Guts of Termites [Reticulitermes flavipes (Kollar)]
C. J. Potrikus, John A. Breznak
Applied and Environmental Microbiology Jul 1980, 40 (1) 117-124; DOI:

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Uric Acid-Degrading Bacteria in Guts of Termites [Reticulitermes flavipes (Kollar)]
C. J. Potrikus, John A. Breznak
Applied and Environmental Microbiology Jul 1980, 40 (1) 117-124; DOI:
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