Variations In the Glutamate Decarboxylase Activity of the Lupinus albus Seeds During Germination

Abstract

Changes on glutamate decarboxylase activity on germinating Lupinus albus seeds have been investigated. The variations found along the first nine days. Enzymie activity in the 3th day was twice higher than the initial values and afterwards this activity decreased to very low values on 5th to 6th days. The results presented in embryo and cotyledons demonstrate the important role of this enzyme on glutamic acid metabolic pathways, not only because the remarkable proportions of this enzyme in the dry seed but also in the growing plant. Potasium nitrate and phosphate increased the observed changes.