Phosphate solubilization by Penicillium spp. isolated from soil samples of Indian Himalayan region |
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Authors: | Anita Pandey Namrata Das Bhavesh Kumar K Rinu Pankaj Trivedi |
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Institution: | (1) Environmental Physiology and Biotechnology, GB Pant Institute of Himalayan Environment and Development, Kosi-Katarmal, Almora, Uttaranchal, 263 643, India |
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Abstract: | A total of 246 fungal isolates representing 36 genera and 72 species were isolated from the soil samples collected from Indian
Himalayan region. Twenty-one species belonged to the genus Penicillium alone. All the Penicillium species were screened for phosphate solubilizing activity on Pikovskaya agar at 21 °C. Eight species of Penicillium, exhibiting formation of halos (zone of solubilization) around the fungal colonies in qualitative plate assays, were selected
for quantitative estimations. In quantitative estimations that were conducted upto day 30 (at 3 days interval), seven species
of Penicillium brought maximum solubilization after day 15, while P. oxalicum showed maximum solubilization after day 21 of incubation. The increase in solubilization coincided with decrease in pH of
the broth. Acid phosphatase activity was 1.5–2.0 times higher in comparison to alkaline phosphatase. Many of these species
showed wide range of tolerance for temperature, pH and salt concentration. |
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Keywords: | Penicillium Phosphate-solubilization Phosphatase Himalaya |
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