Diazotrophs in the digestive tract of termite Neotermes castaneus

  title={Diazotrophs in the digestive tract of termite Neotermes castaneus},
  author={M. Golichenkov and N. Kostina and T. A. Ul’yanova and T. Kuznetsova and M. M. Umarov},
  journal={Biology Bulletin},
Normal vital activity of termites Neotermes castaneus requires the presence and continuous replenishment of transient nitrogen-fixing bacteria in their digestive tract, which is realized by coprophagy and repeated utilization of substrate enriched in termite feces. This is the first demonstration of significant changes in the complex of aerobic and facultatively anaerobic nitrogen fixers mediated by an extension of microbial group composition and a shift in dominant taxa in termites that cannot… Expand
Specific features of nitrogen fixation in the termite Reticulitermes lucifugus
It is concluded that no symbiotic (mutualistic) relationship exists between nitrogen-fixing intestinal bacteria and their host termites. Expand
Microbial Nitrogen Fixation in the Intestine of Tipulidae Tipula maxima Larvae
Nitrogen fixers actively developing in the intestines of larvae stimulate a sharp increase in nitrogenase activity in the soil: after 3 months of incubation, the activity increases eightfold; it can contribute to the accumulation of nitrogen in the habitats of the larvae. Expand
Functional features of microbial communities in the digestive tract of field voles (Microtus rossiaemeridionalis and Clethrionomys glareolus)
The nitrogen-fixating activity in the cecum was found to be the highest in the voles compared with the mammals studied earlier and the seasonal dynamics of both nitrogenase and cellobiohydrolase activities was registered in the southern vole. Expand
Insect-mediated nitrogen dynamics in decomposing wood
By accelerating the release of nutrients immobilised in fungal tissues and promoting N 2 fixation by free-living and endosymbiotic prokaryotes, saproxylic insects have the potential to influence N dynamics in forests. Expand
Insect‐mediated nitrogen dynamics in decomposing wood
A large number of wood‐dwelling microbes have developed unique strategies for coping with the N limitations imposed by their substrate, including the translocation of N into wood by cord‐forming fungi and the fixation of atmospheric nitrogen by bacteria and Archaea. Expand


Nitrogen fixation by bacteria from the hindgut of termites.
Anaerobically grown bacteria isolated from the hindgut contents of the termites Coptotermes lacteus (Froggatt), Mastotermes darwiniensis Froggatt and Nasutitermes exitiosus (Hill) wereExpand
Specific Features of Nitrogen Fixation and Denitrification in Termites Neotermes castaneus, Zootermopsis angusticollis, and Reticulitermes lucifugus
We studied specific features of microbial nitrogen fixation and denitrification in laboratory cultures of the termites Neotermes castaneus, Zootermopsis angusticollis, and Reticulitermes lucifugus,Expand
Nitrogen Fixation by Symbiotic and Free-Living Spirochetes
Spirochetes from termite hindguts and freshwater sediments possessed homologs of a nitrogenase gene (nifH) and exhibited nitrogenase activity, a previously unrecognized metabolic capability in spirochets, which implicate spiroChetes in the nitrogen nutrition of termites, whose food is typically low in nitrogen, and in global nitrogen cycling. Expand
Changes in Nitrogen Fixation Rates in Termites (Isoptera: Rhinotermitidae) Maintained in the Laboratory
It is demonstrated that the eastern subterranean termite, Reticulitermes flavipes (Kollar), and R. virginicus (Banks) in the laboratory can regain and may exceed their original field rates of nitrogen fixation. Expand
Termite guts: the world's smallest bioreactors
Termite hindguts have long been considered simply to be anoxic fermentors, similar to the rumen of cattle. This concept was challenged by recent investigations employing microsensor techniques, whichExpand
The gut microflora of Reticulitermes flavipes, its relation to oxygen, and evidence for oxygen-dependent acetogenesis by the most abundant Enterococcus sp.
The gut microflora of the wood-feeding termite Reticulitermes flavipes is characterized, showing that the isolate Enterococcus strain RfL6, representing the most abundant physiotype among the carbohydrate-utilizing gut bacteria, was not purely fermentative, but consumed oxygen during growth on glucose, accompanied by a complete shift in the product spectrum from lactate to acetate, and was able to oxidize lactateto acetate when oxygen was present. Expand
Gut bacteria recycle uric acid nitrogen in termites: A strategy for nutrient conservation.
  • C. J. Potrikus, J. Breznak
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1981
Symbiotic recycling of uric acid N appears to be important to N conservation in these oligonitrotrophic insects, either directly via glutamine synthetase activity of fat body tissue or indirectly through microbe assimilation. Expand
Use of carbon and nitrogen isotope ratios in termite research
In this paper, I review carbon and nitrogen isotopic (natural abundance levels) studies of termites. The carbon isotope ratio of CH4 emitted from termites, together with the emission rates of CO2,Expand
Bacterial Populations Associated with Different Regions of the Human Colon Wall
The microorganisms associated with the undiseased human colon wall were examined in material obtained from four sudden-death victims, showing a complex microbial structure within the mucus, but major variations in the bacterial populations in different areas of the colon were not found. Expand
Variation in AcetyleneReduction ( NitrogenFixation ) Rates in Reticulitermes spp
  • Virginia J . Sci .
  • 1992