Changes in the activities of certain oxidizing enzymes during germination and seedling development of Phaseolus mungo and sorghum vulgare

Changes in the activities of certain oxidizing enzymes during germination and seedling development of Phaseolus mungo and sorghum vulgare

1963

REP.MB-1187

Quantitative variations in two iron-porphyrin enzymes and two copper-containing enzymes have been studied durin the ermination process and seedJin development of Sorghum vulgare and Phaseolus mungo. Peroxidase activity shows a reular, steep increase in all parts of S. vulgare and in roots and cotyledons of P. mungo. Polyphenol oxidase is low or absent initially but increases rapidly to a nearly constant level by the fourth day of ermination. Catalase activity exhibits a somewhat reciprocal relationship to that of polyphenol oxidase and peroxidase. Ascorbic acid oxidase is absent in all parts of S. vulgare and in the cotyledons of P. mungo. It is, however, hi h initially in the embryos of P. vulgare on the second day of ermination and drops sharply to a low level subsequently. The probable causes for these variations are discussed.

v.1(2):98-100, INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY

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