Effects of Gibberellic Acid on Enzyme Formation in Cotyledons of Germinating Mung Beans

บทคัดย่อ

The influences of exogenously supplied gibberellic acid on amylase, catalase and carboxypeptidase B activities in cotyledons of germinating mung beans were studied. Gibberellic acid caused qualitative and quantitative changes in  α-amylase production. Cotyledons of seed germinated in the presence of GA₃, developed more amylase activity than those germinated on water did. The present results indicated that GA₃, induced two different forms [1 and 2] of α-amylase. The requirement of GA₃, for the synthesis of α-amylase was also discussed. In contrast to amylase, catalase and carboxypeptidase B decreased during the time course of germination. No significant development of catalase and carboxypeptidase B activity was found in GA₃,- treated cotyledons.