Department of Cellular and Environmental Physiology, Scottish Crop Research Institute, Invergowrie,Dundee DD2 5DA, United KingdomABSTRACTExcision of developing potato (Solanum tuberosum L.) tubersfrom the mother plant, followed by storage at 10°C, resulted in arapid, substantial decrease in sucrose synthase activity andconsiderable increases in hexose content and acid invertaseactivity. A comparison of the response of three genotypes, knownto accumulate different quantities of hexoses in storage, showedthat both sucrose synthase activity and the extent to whichactivity declined following excision were similar in all cases.However, there was significant genotypic variation in the extentto which acid invertase activity developed, with tubers accumulating