Volume 6 Issue 2

Isolation and characterization of bacterial isolates from chilli (Capsicum annuum L.) rhizosphere as potent plant growth promoter

Author(s): M. DATTA, C. SENGUPTA AND M. K. PANDIT
Abstract: The present study was carried out at Department of Botany, University of Kalyani, Kalyani, Nadia, West Bengal, with the objective to isolate, characterize chilli rhizospheric soil bacteria and record their plant growth promoting rhizobaetana (PGPR) activity potential in southern West Bengal as a model. Chilli plants were collected from local farmers' fields. Bacterial strains were collected from rhizospheric soil, rhizoplane and root invaded condition by dilution plate count technique employing 4-different media. The isolated bacterial strains were characterized by their morphological, cultural, staining and biochemical properties. Salt and pH tolerance also been studied. Different direct plant growth promoting activities of the bacterial isolates viz. ammonia production, phosphate solubilization, siderophore production, !AA production and indirect activities such as hydrocyanic acid (HCN) production, against antagonistic effect on plant pathogenic bacteria (Pseudomonas, Xanthomonas) and fungus (Fusarium) were studied. It was found that out of 36 isolates, except 4 isolates all showed multifunctional PGPR and bio-control activity. These multifunctional PGPR may be used for improvement of crop peiformance in chilli and the:y may be formulated to be used as biofertilizers for safe farming practices.

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