Acyl-homoserine lactone production is more common among plant-associated Pseudomonas spp. than among soilborne Pseudomonas spp

Article Abstract:

Pseudomonas spp. associated with plants produce various types of N-acyl-homoserine lactones (NAHL) but Pseudomonas spp. from soil do not. Genetic analysis revealed a luxI homologue that is involved in NAHL synthesis.

Microbial metabolism

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Effect of two plant species, flax (Linum usitatissinum L.) and tomato (Lycopersicon esculentum Mill.), on the diversity of soilborne populations of fluorescent pseudomonads

Article Abstract:

Physiological and classical biochemical tests help analyze the influence of two plant species, flax and tomato, on the diversity of soilborne populations of fluorescent Pseudomonas. Majority of bacteria, which are isolated from root tissue of flax belong to P. putida bv. A, while those from root tissues of tomato belong to P. fluorescens bv. II. Significant phenotypic and genotypic differences are observed in bacteria isolated from both uncultivated soil and host plants.

Physiological aspects, Soil microbiology, Tomatoes, Pseudomonas fluorescens, Flax

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The composition of fluorescent pseudomonad populations associated with roots is influenced by plant and soil type

Article Abstract:

The soil type and host plant species determine the phenotypic and genotypic composition of the pseudomonad populations present in the roots of host plants. The effect of soil type on the composition of the microbial population is higher than that of host plant type. The bacteria found in the roots of the same plant species differ in different soils. A comparison of the pseudomonads in the roots of tomato and flax in varying soils, and in uncultivated soils shows significant variations at the species and intraspecies levels.

Observations, Roots (Botany), Microbial populations

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