The termite gut microflora as an oxygen sink: microelectrode determination of oxygen and pH gradients in guts of lower and higher termites

Article Abstract:

The radial oxygen profiles obtained from Clarke-type oxygen microelectrodes, demonstrate the penetration of oxygen of about 150 to 200 micrometer under the epithelial surface in the peripheral hindgut contents of the lower termite and the higher termite. Extreme shift is noticed from the midgut proper to the P1 segment of the hindgut and then to the P3 segment, as observed from the axil pH profiles of the guts. From the axial oxygen profiles it is indicated that only the enlarged hindgut compartments are anoxic in their centers.

Analysis, Measurement, Oxygen, Hydrogen-ion concentration, pH measurement

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Roles of oxygen and the intestinal microflora in the metabolism of lignin-derived phenylpropanoids and other monoaromatic compounds by termites

Article Abstract:

The termites of the major feeding guilds metabolize the monoaromatic compounds and lignin-derived phenylpropanoids only in the presence of oxygen and this mechanism supply the carbon and oxygen requirement of the host. In the anoxic condition, the substrates are metabolized at the time when endogenously formed phenylpropanoids are associated with the gut homogenate. About ten to the fifth power of bacteria present in the termite guts are responsible for the cleavage of the aromatic substrates.

Metabolism

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Hydrogen profiles and localization of methanogenic activities in the highly compartmentalized hindgut of soil-feeding higher termites (Cubitermes spp.)

Article Abstract:

Research was conducted to localize hydrogen sources and sinks implicated in lignocellulose degradation occurring in the hindguts of soil-feeding termites. Results show hydrogen is mainly contributed by methanogenesis.

Germany, Methods, Soil degradation, Methanobacteriaceae, Methanogens, Methanol, Microelectrodes, Acetic fermentation

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