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.

Soil Microbiology Division Regional Research Laboratory Jorhat 785 006 Assam India

Zobrazit více v PubMed

Folia Microbiol (Praha). 1999;44(4):385-7 PubMed

Anal Biochem. 1987 Jan;160(1):47-56 PubMed

Indian J Exp Biol. 1996 Jul;34(7):706-9 PubMed

Folia Microbiol (Praha). 2000;45(6):539-43 PubMed

J Bacteriol. 1988 Aug;170(8):3499-508 PubMed

Appl Environ Microbiol. 1984 Oct;48(4):897-9 PubMed

Characterization of two antagonistic strains of Rahnella aquatilis isolated from soil in Egypt

Significance of Herbaspirillum seropedicae inoculation and/or straw amendment on growth and dinitrogen fixation of wheat using 15N-dilution method

Biological activity of secondary metabolites produced by a strain of Pseudomonas fluorescens