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Pesticide tolerant and phosphorus solubilizing Pseudomonas sp. strain SGRAJ09 isolated from pesticides treated Achillea clavennae rhizosphere soil
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Pesticide tolerant and phosphorus solubilizing Pseudomonas sp. strain SGRAJ09 isolated from pesticides treated Achillea clavennae rhizosphere soil
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Journal Article
Pesticide tolerant and phosphorus solubilizing Pseudomonas sp. strain SGRAJ09 isolated from pesticides treated Achillea clavennae rhizosphere soil
2013
Overview
In this study, an attempt was made to identify an effective phosphate solubilizing bacteria from pesticide polluted field soil. Based on the formation of solubilization halo on Pikovskaya’s agar, six isolates were selected and screened for pesticide tolerance and phosphate (P) solubilization ability through liquid assay. The results showed that only one strain (SGRAJ09) obtained from
Achillea clavennae
was found to tolerate maximum level of the pesticides tested and it was phylogenetically identified as
Pseudomonas
sp. It possessed a wide range of pesticide tolerance, ranging from 117 μg mL
−1
for alphamethrin to 2,600 μg mL
−1
for endosulfan. The available P concentrations increased with the maximum and double the maximum dose of monocrotophos and imidacloprid, respectively. On subjected to FT-IR and HPLC analysis, the presence of organic acids functional group in the culture broth and the production of gluconic acid as dominant acid aiding the P solubilization were identified. On comparison with control broth, monocrotophos and imidacloprid added culture broth showed quantitatively high organic acids production. In addition to gluconic acid production, citric and acetic acids were also observed in the pesticide amended broth. Furthermore, the
Pseudomonas
sp. strain SGRAJ09 possessed all the plant growth promoting traits tested. In presence of monocrotophos and imidacloprid, its plant growth promoting activities were lower than that of the pesticides unamended treatment.
Publisher
Springer US,Springer,Springer Nature B.V
Subject
/ Achillea
/ Ammonia
/ Analysis
/ bacteria
/ Carbon-Carbon Lyases - metabolism
/ Chromatography, High Pressure Liquid
/ Earth and Environmental Science
/ Ecology
/ high performance liquid chromatography
/ Hydrogen Cyanide - metabolism
/ Indoleacetic Acids - metabolism
/ Nitro Compounds - metabolism
/ Pseudomonas - classification
/ Pseudomonas - growth & development
/ Pseudomonas - isolation & purification
/ soil
