Role of Antagonistic Microorganisms and Organic Amendment in Stimulating the Defense System of Okra Against Root Rotting Fungi
Journal Title: Polish Journal of Microbiology - Year 2015, Vol 64, Issue 2
Abstract
Without application of chemical pesticides control of soilborne diseases is a great challenge. Stimulation of natural plant’s defense is considered as one of the most promising alternative strategy for crop protection. Organic amendment of soil besides direct suppressing the pathogen, has been reported to have an influence on phytochemicals in plants. In the present study, [i]Pseudomonas aeruginosa[/i], a plant growth promoting rhizobacterium and [i]Paecilomyces lilacinus[/i], an egg parasite of root knot and cysts nematodes were examined individually and in combination in soil amended with cotton cake for suppressing the root rotting fungi and stimulating the synthesis of polyphenols and improving the antioxidant status in okra. Application of [i]P. aeruginosa[/i] and [i]P. lilacinus[/i] in soil amended with cotton cake significantly (P < 0.05) suppressed [i]Macrophomina phaseolina[/i], [i]Fusarium oxysporum[/i], and [i]Fusarium solani [/i]with complete reduction of [i]Rhizoctonia solani[/i]. Combine use of biocontrol agents in cotton cake amended soil showed maximum positive impact on plant growth, polyphenol concentration and antioxidant activity in okra.
Authors and Affiliations
Hafiza Shafique, Viqar Sultana, Jehan Ara, Syed Ehteshamul-Haque, Mohammad Athar
Keywords
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