Influence of two plant species (flax and tomato) on the distribution of nitrogen dissimilative abilities within fluorescent Pseudomonas spp

Article Abstract:

Denitrifying Pseudomonas strains which can be nondissimilatory, dissimilatory, nitrate reducers or true denitrifiers are affected by the plant roots present in the soil in which they are found. The number of these strains found in soil near tomato and flax roots is more than that found in uncultivated soil. Studies show that tomato roots affect the ratio of denitrifiers to nitrifiers more while flax roots affect the number of denitrifying strains which are able to reduce N2O.

Health aspects, Pseudomonas

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Transformation of 3- and 4-picoline under sulfate-reducing conditions

Article Abstract:

The effect on 3- and 4-picoline of a sulfate electron acceptor is discussed. Soil degraded by different alkylated pyridine derivatives was used to enrich picoline-degrading cultures. 3-picoline was transformed by carbon dioxide and ammonia. 4-picoline produced a metabolite which was identified by gas chromatography-mass spectrometry and nuclear resonance analysis. The capability of pyridine-contaminated soil for transforming 3- and 4-picoline was demonstrated.

Research, Pyridine

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Nitric oxide reductase-targeted real-time PCR quantification of denitrifier populations in soil

Article Abstract:

Real-time PCR primers were used for targeting two segments of the denitrifier population in agricultural soils based on functional nitric oxide reductase gene (cnorB). Results suggest that there was a significant increase in denitrification rates, respiration and cnorB population densities due to the increase in rates of glucose addition in soil microcosms.

Industrial Gas Manufacturing, Industrial gases, Nitric Oxide

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