A total of twenty two rhizospheric fungi were isolated from different rhizosphere soil of healthy crop plants of Mysore, Karnataka, India and tested for their efficacy to solubilize phosphates in PKV medium. Among the isolates, Penicillium sp. RFUOM 14 solubilized phosphates by producing clear halo zone around the colony. Further, Penicillium sp. RFUOM 14 inducers were treated for different crop plants and observed that the treatments enhanced seed germination and seedling vigor. Among the treatments, conidial suspension treated for 6 h showed maximum of 85.75 %, 80 % and 83 % of seed germination and seedling vigor 985.25, 523 and 673.5 in pearl millet, brinjal and tomato, respectively.
Boerhaavia diffusa L. is widely used for its ethno-medicinal properties. The present study assessed the antibacterial activity of endophytic fungi harbored in this plant. The endophytic fungi isolated belonged to various genera like Aspergillus, Cladosporium, Colletotrichum, Curvularia, Fusarium, Pestalotiopsis and Zygorhynchus and the overall colonization frequency of endophytic fungi was found to be 24%. Among the isolated fungi Aspergillus fumigatus, Cladosporium sphaerospermum, Fusarium sp. and Zygorhynchus sp. showed antibacterial activity in preliminary screening against one or all the test bacteria. Further, after fermentation, the ethyl acetate extracts of the selected endophytic fungi displayed variable antibacterial activity with maximum 54.75 mm and a minimum 27.50 mm zone of inhibition against test bacteria in disc diffusion assay. The lowest minimum inhibitory concentration (MIC) was 0.156 mg ml -1 in the broth dilution assay against a B. subtilis, S. typhi and Staph. aureus, while it was 0.312 mg ml -1 against E. coli which was offered by the ethyl acetate extracts of A. fumigatus.
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