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Biological sciences

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The earthworm gut: an ideal habitat for ingested nitrogen oxide-producing microorganisms

Article Abstract:

Results suggest that the microenvironment of the earthworm gut is well suited for the habitat by the nitrous oxide-producing bacteria with the in situ gut conditions activating the ingested nitrous oxide-producing soil bacteria. The gut environment is anoxic, pH 6.9 with about 50% water content. The gut bacteria are enriched in total carbon, organic carbon, and total nitrogen with a carbon to nitrogen ratio of 7.

Analysis, Bacteria, Habitat partitioning (Biology), Habitat partitioning (Ecology)

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Nitrous oxide reductase genes (nosZ) of denitrifying microbial populations in soil and the earthworm gut are phylogenetically similar

Article Abstract:

The denitrifier populations of gut and soil from three different sites were comparative assessed by sequence analysis of nosZ, based on the hypothesis that the denitrifiers in the earthworm gut are not endemic to the gut but are regular members of the soil denitfifier population. Results reveal that the phylogenies of nosZ from gut and soil are not similar, indicating that gut denitrifiers are soil derived.

Science & research, Research, Environmental aspects, Genetic aspects, Observations, Soil microbiology

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N(sub)2O-producing microorganisms in the gut of the earthwork Aporrectodea caliginosa are indicative of ingested soil bacteria

Article Abstract:

Results indicate that the nitrous oxide emission from the earthworms is coming from the ingested denitrifiers and other nitrate-dissimilating gut lumen bacteria. Further, the nitrous oxide production is associated with the gut contents rather than the gut wall and that the denitrifiers producenitrous oxide by 1 to 2 orders of magnitude greater than those of nondenitrifying isolates.

Drugs, In-Vitro Diagnostic Substance Manufacturing, Bacterial Culture Products, Bacteriology, Bacterial cultures

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