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Edible quality both sensorial and nutritional of iceberg lettuce declines rapidly after harvest and considerable losses may occur during storage.The aim of this research was to evaluate what role of ethylene may play in deteriorations of edible quality of the vegetable and efficacy of the postharvest treatment withgibberellic acid (GA3) or l-methylcyclopropene (1-MCP) on the quality,nutrition and enzymes of the vegetable during shelf life after harvest.