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Indian Journal of Agricultural Biochemistry
Year : 2005, Volume : 18, Issue : 2
First page : ( 71) Last page : ( 74)
Print ISSN : 0970-6399.

Impact of leaf curl disease on capsaicinoids in mature fruits of hot pepper (Capsicum annuum)

Khan M S1, Raj S K1, Upadhyay Garima2, Prakash Dhan2,*

1Molecular Virology Laboratory, National Botanical Research Institute, Lucknow-226001, India.

2Nutraceutical Chemistry, National Botanical Research Institute, Lucknow-226001, India.

(*Corresponding author: dprakash_in@yahoo.com)

Abstract

The impact of the leaf curl disease caused by a begomovirus on capsaicinoids content in diseased fruits of six cultivars of hot pepper was investigated. The amounts of capsaicin, dihydrocapsaicin and nor-dihydrocapsaicin were found invariably higher in the diseased samples as compared to the healthy. The inter-varietal variation of capsaicin in healthy fruits ranged from 0.51 to 2.25 mg/g, dihydrocapsaicin 0.31 to 2.98 mg/g and nor-dihydrocapsaicin 0.04 to 0.75 mg/g where as in diseased fruits capsaicin ranged from 1.72 to 2.67 mg/g, dihydrocapsaicin 1.09 to 3.52 mg/g and nor-dihydrocapsaicin 0.12 to 0.86 mg/g. The highest impact of virus infection was recorded in Selection–16, which showed almost a four fold increase in dihydrocapsaicin and three fold in capsaicin and nor-dihydrocapsaicin contents in the fruits as a result of disease infestation. The protein, total phenols, antioxidant and free radical scavenging activities were also found higher in the diseased fruits than that of healthy.

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Keywords

Capsicum annuum, leaf curl disease, capsaicinoids, total phenols, antioxidant activity, free radical scavenging activity.

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