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. 2002;47(2):137-43.
doi: 10.1007/BF02817671.

Plant disease suppression and growth promotion by a fluorescent Pseudomonas strain

H P Deka Boruah  1 , B S Dileep Kumar
Affiliations

Plant disease suppression and growth promotion by a fluorescent Pseudomonas strain

H P Deka Boruah et al. Folia Microbiol (Praha). 2002.

Abstract

An antibiotic- and siderophore-producing Pseudomonas strain isolated from virgin soils (with forest trees) displayed in vitro antibiosis against many plant pathogenic fungi. The presence of iron had no effect on this in vitro antibiosis. Seed bacterization improved germination, shoot height, root length, fresh and dry mass, enhanced yield and chlorophyll content of leaves in the five test crop plants under field conditions. Seed bacterization also reduced the number of infected brinjal plants grown in soil infested with Rhizoctonia solani. The strain produced a yellowish green siderophore in the standard succinate medium and both siderophore and a yellow viscous antibiotic compound in King's B medium. The results confirmed that the plant growth promotion was due to siderophore production whereas the disease suppression was due to the antibiotic substance.

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