Analysis of Resistant Mechanisms in Groundnut Genotypes against Late Leaf Spot Disease

Abstract

Forty two groundnut (Arachis hypogaea) cultivars were screened for resistance to 
Phaeoisariopsispersonata under glasshouse conditions. Among them, two germplasms (VG19561 and 
VG19654) were found to have resistance against late leaf spot. Biochemical parameters such as, phenylalanine 
ammonia-lyase, peroxidase, polyphenol oxidase and total phenols were estimated among the resistant 
germplasms and susceptible check, VRI2. biochemical analysis revealed the increased activities of the enzymes 
viz., phenylalanine ammonia lyase, peroxidase, polyphenol oxidase, and phenolics in the resistant germplasms 
viz., VG19561 and VG19654 than the susceptible check, VRI 2.