2007•Northern HorticultureRequires access

Effect of Plant Growth Regulators on Fruit Coloration of Cara Cara Orange

Qiang‐Sheng Wu

Abstract

Different concentration of ABA and GA_3 were applied to Cara Cara Orange at young fruit formation and before fruit coloration,and their effect on fruit coloration was analyzed.The results showed that total content of chlorophyll and carotenoid in peel of Cara Cara Orange reached their maximum(0.116mg/g FW and 0.029mg/g FW)at July 25 and December 25,respectively.Exogenous ABA treatment accelerated the decomposition of chlorophyll in fruit peel,while inhibited the accumulation of carotenoid.GA_3 treatment delayed the decomposition of chlorophyll and inhibited the syn- thesis of carotenoid.

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Key concepts: Orange (colour), Carotenoid, Chlorophyll, Horticulture, Botany, Chemistry, Chlorophyll a, Biology