The effect of gibberellic acid application before color break on peel color, fruit respiration, and soluble sugars in different tissues of ‘Hamlin’ sweet orange fruit to test the hypothesis that GA3 influence on peel color might be mediated by sugars. Fruit were sprayed with GA3 in early October of 2 consecutive years. Peel color, whole-fruit respiration, and fructose, glucose, and sucrose levels were quantified in flavedo and albedo tissues when nontreated fruit were still green, at precolor break, color break, and when peels were fully yellow.
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