Document Type : Full Paper
Authors
1
Former M.Sc. Student, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
2
Professor, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
3
Assistant Professor, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
Abstract
In the current research, salicylic acid and putrescine treatments solutions each with 0, 0.5, 1, and 2 mM/L levels were sprayed on the ‘Granny Smith’ apple trees in three preharvest stages. The treatments were applied based on factorial experiment in the randomized complete block design. Weight loss, fruit firmness, total soluble solids (TSS), titratable acidity (TA), pH, TSS/TA, peel color, and ascorbic acid parameters were measured in five stages after the harvest. The results revealed that the treatments led to reduce weight loss, to maintaine fruit firmness and to conserve TA parameters significantly (p<0.05) and were significantly effective on TSS values as compared to the control ones. In general, the samples treated with 1 and 2 mM/L levels of both salicylic acid and putrescine solutions had the lowest weight loss, the greatest fruit firmness and the highest TA, as compared to the other levels. TSS was affected significantly by 2 mM/L level of both salicylic acid and putrescine solutions only in some stages. None of the treatments showed significant influences on pH, TSS/TA and peel color parameters in neither of the studied periods of storage.
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