Abraham SebastianSujatha, V SNybe, E VSreekandan Nair, GKAU2018-12-132018-12-132000Journal of Tropical Agriculture, 38(1), 9-14.http://krishikosh.egranth.ac.in/handle/1/5810085683Isoenzyme patterns of 26 varieties of P. nigrum were compared for three enzymes viz., csterase, peroxidase and glutamate oxaloacetate transaminase. Similarity among the varieties ranged from 0.40 1.00. Wide variation was observed among the cultivated types of P. iiignini for the three enzymes analysed.ennullArticle