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Azotobacter species as a Natural Plant Hormone Synthesizer

Author Affiliations

  • 1Department of Botany, P.V.P. College of Arts Science and Commerce, Pravaranagar (Loni), Arts Science and Commerce College Kolhar

Res. J. Recent Sci., Volume 3, Issue (IVC-2014), Pages 59-63, (2014)

Abstract

Azotobacter plays an important role in increasing the development and physical condition of plants.Azotobacter as non symbiotic nitrogen fixing bacteria was isolated from six different rhizospheric soil samples were collected from the ten different villages of Pravara area. Isolation of Azotobacter spp was carried out using Ashbys liquid and were purified further. Each Azotobacter spp culture were recognized through microscope and biochemically tests were carried out and as per consequences obtain the spp were in, A. vinelandii, A.insignis, A. chroococcum , A.agilis. A. beijerinckia, A.macrocytogenes.Results strongly supports that the Azotobacter spp in combinations C+M+I and B+V+A are significantly effective to improve the crop yield. Their efficiency equal to the recommended dose of fertilizers. Highest gibberllic acid in production AzT1, kinetin in AzT2, NAA in AzT1 AzM3 andIAA. This supported that mutual association of Azotobacter spp. lead to synthesis of growth hormone, nitrogen, phosphate uptake and modification in rhizospheric interactions with respect to wheat varieties. Results strongly supports that the Azotobacter spp combinations C+M+I and B+V+A are significantly effective to improve the crop yield. Their efficiency equal to the recommended dose of fertilizers. The Azotobacter spp are capable of producing two phytohormones. A. chroococcum is found in the rhizospheric which posses the ability to enhance plant growth when applied to roots applied on tubers seed dressed are functioning as a plant growth promoting rhizobacteria. It was further experimentally proved that plant response to inoculation with PGPR enhance nitrogen and parameters such as plant dry weight, development, morphology of root system, grain yield, protein and mineral nutrient content. They further observed that plant response to inoculation with PGPR enhance nitrogen and parameters such as plant dry weight, development, morphology of root system, grain yield, protein and mineral nutrient content.

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