Lösliche Saccharase bei normalem und durch Gibberellin stimuliertem Längenwachstum von Zwergerbseninternodien

Abstract

The activity of soluble invertase and its relation to growth were studied in dwarf pea plants treated with gibberellic acid (GA3) and in water treated controls. Invertase activity increased with elongation in the individual internodes, reached a maximum and later declined, meaning that invertase of internodes is undergoing continous turnover during elongation (fig. 1, 2). GA3 treatment increased both elongation and invertase activity to the same extent (fig. 3, 4) without altering the kinetics of the two processes (fig. 4). The maximum of invertase activity per g fresh weight preceded that of elongation rate (fig. 4a) of the internodes of the two treatments. But when the enzyme activity was calculated to the protein of the internode, the maxima of activity and elongation rate were reached at the same time (fig. 4 b). The invertase activity per internode reached its maximum only upon cessation of elongation (fig. 5). The results were discussed with regard to the causal relationship between invertase and growth.