Abstract: Changing pattern of invertases during germination (1-8 days) of mung bean seeds was studied. Two types of invertases acid and alkaline were found to be present. The alkaline form was predominant in early germinative tissue (day old seedlings) but was quickly replaced by the acidic form which persisted upto eight days of age. Administration of chloramphenicol (20 μg/ml) resulted in an inhibition in the activity of acid invertase indicating its denovo synthesis during germination. Comparative studies were also made at various ages for six different tissues viz. embryo, cotyledons, shoots, roots, petals and anthers among four mung cultivars. Results indicate significant differences in the level of invertase among the four cultivars of mung bean which commence from pregerminative stage and persist through the early postgerminative stages to the young shoots, roots and floral tissues. We therefore suggest an early selection amongst varieties for reducing sugar content with respect to this biochemical parameter.