Abstract

The effect of CCC on the release of ethylene in apple varieties Jonathan, Sudetská reneta , and Panenské české was followed. CCC applied on fruits in the form of paste during the vegetation period induced the time shift of climacterium (Fig. 1 and 2). Low concentrations of CCC (0.1 per cent) forced the maturation by 10 days and concentrations higher than 1.0 per cent of CCC prolonged the climacterium by as much as 1 month. On the other hnad, CCC applied in the form of aqueous solution did not influence expressively changes in the ethylene release during the preclimacteric and climacteric stages. In the postclimacteric stage lower concentrations of CCC (about 0.25 per cent) stimulated the ethylene formation which reached the level of ethylene production observed in unseeped apples (Fig. 3).

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