Growth regulator effects on retention of quality of stored citrus fruits
Identifieur interne : 003B25 ( Main/Exploration ); précédent : 003B24; suivant : 003B26Growth regulator effects on retention of quality of stored citrus fruits
Auteurs : Mohamed El-Otmani [Maroc] ; Charles W. Coggins Jr [États-Unis]Source :
- Scientia Horticulturae [ 0304-4238 ] ; 1991.
Abstract
A 3-year study was initiated to determine the possible effects of two growth regulators, 2,4-dichlorophenoxy acetic acid (2,4-D) and gibberellic acid (GA3) on the quality of on-tree-stored and cold-stored fruits of cultivar ‘Clementine’ mandarin (Citrus reticulata Blanco) and cultivar ‘Washington’ navel orange (Citrus sinensis (L.) Osbeck). Treatments were applied at fruit color break as whole tree sprays, and fruits were either analyzed immediately after harvest or stored at 4°C and 85% relative humidity and analyzed at 4 and 8 weeks of storage. Regardless of the cultivar, GA3 alone or in combination with 2,4-D significantly slowed the rate of rind color change and the rate of rind softening, both on the tree and post-harvest. However, the rate of change in color and firmness of the rind on the tree and post-harvest was variety dependent. When used alone, 2,4-D had no effect on these factors. No growth regulator effects were noted on weight loss, extractable juice, juice titratable acidity (TA) and total soluble solids (TSS), or the ratio TSS/TA. It is concluded that the delayed senescence obtained from GA3 is primarily at the rind level.
Url:
DOI: 10.1016/0304-4238(91)90072-7
Affiliations:
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