Status of phenolic metabolism and α-amylase inhibitor in maize under Chilo partellus infestation

Kaur, Sarbjit and Kaur, Kamaljit and Jindal, Jawala (2022) Status of phenolic metabolism and α-amylase inhibitor in maize under Chilo partellus infestation. CEREAL RESEARCH COMMUNICATIONS, 50 (4). pp. 865-873. ISSN 0133-3720 (print), 1788-9170 (online)

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Abstract

The present study was aimed to determine the status of phenolic metabolism and α-amylase inhibitor in maize genotypes showing differential tolerance towards Chilo partellus infestation. The central whorl leaves and stems of the infested maize genotypes were collected at seven days interval from the day of infestation till 28 days of infestation. In general, the contents of phenolic compounds—total phenols, flavonols, o-dihydroxyphenols, tannins and the activities of phenylalanine ammonia lyase, tyrosine ammonia lyase, peroxidase and polyphenol oxidase were comparatively higher in the tolerant genotypes (PMH 3 and CM 500) as compared to the susceptible ones (PMH 1 and CM 139). The α-amylase inhibitor activity was higher in the central whorl leaves and stems of PMH 3 against both salivary and gut α-amylases of Chilo partellus, under control and infested conditions. It may be concluded that the higher content of phenolic compounds, induced activities of the phenol metabolizing enzymes and the high α-amylase inhibitor activity of tolerant genotypes against both salivary and gut α-amylases might be responsible for inducing resistance against Chilo partellus infestation.

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