Abstract
Abstract ‘Redhaven’ peach fruits were exposed to various durations of radiation at the end of stage II of fruit development. Exposure of only 3 days (totals about 6280 J·em−2) markedly stimulated anthocyanin development. Color development as a function of solar radiation followed a power curve with nearly maximal level obtained after 8 days of exposure (18,003 J·em−2). A similar response was obtained with shade screen (40% and 10% of full sun); the greater the shade the less red color developed. Shading fruit with aluminum foil resulted in softer fruit with a lower level of soluble solids as compared to control fruit. Fruit exposure to solar radiation therefore may have a direct effect on fruit sink activity.
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