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Asian Journal of Biological Sciences
Year: 2011  |  Volume: 4  |  Issue: 3  |  Page No.: 291 - 299

Plant Growth Promoting Activities of Fungi and their Effect on Chickpea Plant Growth

Janardan Yadav, Jay Prakash Verma and Kavindra Nath Tiwari    

Abstract: Aspergillus niger strain BHUAS01, Penicillium citrinum strain BHUPC01 and Trichoderma harzianum was tested for phosphate solubilizing potential and plant hormones production (indole acetic acid). The fungal strains were tested for their in-vitro phosphate solubilizing potential using Pikovskaya broth containing tricalcium phosphate (TCP) as the sole phosphorus source. All the cultures were found to solubilize TCP but with varying potential. The Aspergillus niger showed maximum amount of soluble phosphate (328 μg mL-1), followed by P. citrinum (301 μg mL-1) and T. harzianum (287 μg mL-1) after 6 days of incubation at 28±2°C. Indole Acetic Acid (IAA) production was estimated maximum in A. niger (85 μg mL-1) followed by T. harzianum (68 μg mL-1) and P. citrinum (52 μg mL-1) after 3 days of incubation at 28+2°C. T. harzianum is a well known biological controlling agent against several soil borne phytopathogens. It showed antagonistic against Fusarium oxysporum and Rhizoctonia solani. Under laboratory conditions, coinoculation of T. harzianum and A. niger showed significant increase in chickpea (Cicer arietinum) growth parameters including shoot length, root length and dry weight of shoot and root followed by single inoculation of T. harzianum and coinoculation of A. niger and P. citrinum over control. The study explores high P-solubilizing potential of A. niger and T. harzianum, which can be exploited for the solubilization of fixed phosphates present in the soil and produce IAA, thereby enhancing soil fertility and plant growth. Coinoculation of T. harzianum and A. niger could be effective biofertilizer and biocontroling agent for chickpea production.

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