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Fluorescent Pseudomonas spp. producing the polyketide antibiotic 2,4-diacetylphloroglucinol
(DAPG) are some of the most effective PGPR that control root and seedling diseases. However,
fluorescent Pseudomonas spp. have emerged as the largest and potentially most promising group of
plant growth-promoting rhizobacteria involved in the biocontrol of plant diseases. The present per
suit has taken the work to study the plant growth promoting activity of bacterial population found in
soil strata of different districts of Chhattisgarh. After 1: 1000 dilution of soil sample on KMB
medium plates, population of Pseudomonas was observed. Preliminarily isolated Pseudomonas spp
identified as Pseudomonas fluorescence through different biochemical tests. Seven candidate
isolates (high in fluorescein, pyocyanin and siderophore production) and crops belonging to
different families (Pigeon pea and Pea (Leguminoseae); Tomato (Solanaceae); Okra (Malvaceae))
were selected to identify the crop responsiveness to different isolates. Seed bacterization had
significant response for root development and showed negligible to very low increase in shoot
length. Higher increase in root length was observed in Pigeonpea and Pea with isolate # P44, P109,
P144, and P195.
Keywords: Soil isolates, Pseudomonas fluorescence, PGPR, Seed bacterization, Rhizosphere