ASSESSMENT AND PRELIMINARY CHARACTERIZATION OF PHOSPHATE SOLUBILIZING DIVERSITY OF FLUORESCENT PSEUDOMONAS SP. IN NORMAL AND REPLANT SITES OF APPLE AND PEAR
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Date
2010
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Abstract
ABSTRACT
Under the present study, an attempt was made to isolate and characterize the Phosphate
solubilizing strains of Pseudomonas sp. from the rhizosphere of normal and replant sites
of apple and pear from different locations of tehsil Nankhari, district Shimla. The aim of
the study was to select and develop best PGPR strain of fluorescent Pseudomonas sp. for
management of replant problem. The thirty Pseudomonas isolates were screened out for
phosphate solubilizing potential along with other plant growth promoting activities such
as siderophore production, antifungal activity, proteolytic activity, HCN and ammonia
production, production of plant growth regulators i.e. auxins, gibberellins and cytokinins.
Out of thirty isolates five isolates were selected for further characterization and
optimization of cultural conditions for mass multiplication of microbial biomass and
preparation of inoculums for field trials. The best levels of these factors were NBRI-P,
48 h of incubation time, 28 ÂșC temperature and pH 7.0.