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Differential effects of prohexadione-calcium on red colour development in 'Royal Gala' and 'Fuji' apples

AutorMata Bordonaba, Ana Pilar ; Val Falcón, Jesús ; Blanco Braña, Álvaro
Fecha de publicación2006
EditorHeadley Bros
CitaciónJournal of Horticultural Science and Biotechnology 81(1): pp. 84-88
ResumenTwo different spray programmes for split application of prohexadione-calcium (ProCa) were tested on 'Royal Gala' and 'Fuji' apple trees (Malus x domestica Borkh.) to evaluate their effect on red colour development in the fruit. Applications of ProCa split into two sprays at full-bloom and 60 d after full-bloom (DAFB) were sufficient to control shoot growth in these cultivars. A third application (95 DAFB) did not result in any additional beneficial effects. In addition to obtaining significant reductions in shoot elongation, reductions in leaf area were also noted. No effects on yield or on various fruit quality parameters resulted from the ProCa treatments, with one important exception, fruits from 'Fuji', a late-season cultivar, displayed a greater percentage of fruit surface with red colour. Simultaneously, a deeper red colour was recorded on the blushed side of the fruit, resulting from greater concentrations of anthocyanins and carotenoids. In contrast, fruits of 'Royal Gala', a mid-season cultivar, did not show differences in fruit colouration following treatment with ProCa.
Versión del editorhttp://www.pubhort.org/jhsb/Vol81/81_1/13.htm
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