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Plant Pathology Journal

Year: 2020 | Volume: 19 | Issue: 1 | Page No.: 54-65
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Authors

Surender Kumar

Samir Kumar Biswas

Samir Kumar Biswas

Har Gyan Prakesh

Devendra Pratap Singh

Keywords

Background and Objective: The plant posses inducible biochemical defense response that is activated upon contact with some biotic and abiotic inducers in systemic acquired resistance. Therefore, the study was undertaken to evaluate inducers in induced resistance for management of phomopsis blight of brinjal. Materials and Methods: The experiment was conducted by using biotic and abiotic inducers in induced resistance against the phomopsis blight in brinjal. The defense molecules like soluble protein, total phenol content and defense enzymes in brinjal plant after treatment with different inducers followed by inoculation of pathogen was measured at 2, 6 and 10 days separately accounting to the standard procedures developed by various scientists. Correlation-coefficient (r) between soluble protein, total phenol content and defense enzymes with disease incidence were calculated by standard statistical calculation. Results: All the treatments were able to reduce the disease severity from 22.90-2.02% at 2 days, 33.92-4.05% at 6 days and 34.78-5.00% at 10 days after inoculation with the minimum in salicylic acid treated plants. The treated plants sensitize to produce increased level of soluble protein, total phenol and defense enzymes like peroxidase, polyphenol oxidase and phenylalanine ammonia lyase contents. The correlation regression equation showed that negative correlation (r) -0.920, -0.555, -0.835, -0.888 and -0.885 was found between total protein, total phenol and defense related enzymes with disease severity at 2 days of pathogen inoculation respectively. Similar observations as negative correlation (r) have also been found at 6 days and 10 days of pathogen inoculation. Conclusion: Prior to pathogenic inoculation, foliar sprayed with salicylic acid sensitize the plant to produced increase level of total phenol, soluble protein and defense enzymes and can be recommended for management of phomopsis blight of brinjal in near future.
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sunil kumar Reply

congratulations sir ji

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