Browsing by Author "Abraham Sebastian"
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ArticleItem Open Access Isoenzyme variation and species relationship in genus piper(Kerala Agricultural University, 1996) Abraham Sebastian; Sujatha, V S; Nybe, E V; Sreekandan Nair, G; Augustine, A; KAUEleven species of Piper including Piper rugrum were studied for variations in isoenzymes of three enzymes viz., peroxidase, esterase and glutaraate oxaloacetate transaminase. On grouping based on isoenzyme similarity, P. nigrum Linn.. P. pseudonigrum Velayudhan and Amalraj, P. bababudani Rahirnan and P. galeatum DC formed one group while P. argyrophyllum Miq. and P. attenuatum Buch-Hara constituted the second group and P. chaha Hunter, P. hapnium Miq. and P. colubrinum Link emerged as the third group. P. betle Linn, and P. longum Linn, showed their distinctness from the rest of the species. Least similarity was observed between P. colubrinum on one side and P. pseudonigrum and P. bahabudani on the other side.ArticleItem Open Access Isoenzyme variation in different plant parts and at different stages of leaf development in piper nigrum L.(Kerala Agricultural University, 1996) Abraham Sebastian; Sujatha, V S; KAUArticleItem Open Access Isoenzyme variation in Piper nigrum L.(Kerala Agricultural University, 2000) Abraham Sebastian; Sujatha, V S; Nybe, E V; Sreekandan Nair, G; KAUIsoenzyme 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.