Zooplankton Attached Bacteria: Potentiality Towards Antifungal and PGPR Properties

Present study analysed thePlant growth promoting rhizobacteria (PGPR) diversity and ecology of zooplanktonZooplankton, and plankton associate bacteria of wetlands of freshwater ecosystem. In course of studies, we found four orders (Cyclopoida, Calanoida, Podocopida and Anomopoda) of zooplanktonZooplankton under two phyla (Arthropoda, rotifer). Distribution patterns of zooplankton species composition revealed discontinuous distribution in the study sites. A total of sixty bacterial isolates were screened from plankton appendages of six different study sites, based on their colony morphology and gram reaction nine native bacterial isolates were selected for further investigation during the study periods. Overall, all strains are grown at a broad range of pH (3–9), temperature (25–50 °C) and salt concentration (1–9%) in invitro condition. Plant growthPlant growth promoting (PGPRPlant growth promoting rhizobacteria (PGPR)) activity was evaluated against five plant spices such as cauliflower, cabbage, tomato, ladies’ finger and mung bean, and found few PGPRPlant growth promoting rhizobacteria (PGPR) factors like indole acetic acid (IAA), salicylic acid (SA), HCN and NH3.From PGPRPlant growth promoting rhizobacteria (PGPR) study it was concluded that isolates SSI1 and SSI5 have evoke the plant growth most actively than others isolate. SSI1 has the highest vigour index against the plant species cauliflower (VI-478.80), and mung bean (VI-1558.27) where SSI5 showing the highest vigour index to the plant species cabbage (VI-828.43), tomato (VI-1046.27) and ladies’ finger (VI-1636.57). Out of these nine isolates, SSI5 (110.47; 13.02 µg/ml) produced highest amounts of IAA and SA, respectively. Visual observation of fungal growth inhibition also revealed that the isolates SSI5 imparts better antifungal activity in compare to other bacterial strains. Present findings showing the new dimension in relation between plankton-bacterial association and role of plankton associate bacteria as a plant growthPlant growth promoter.