Abstract: The contents of chlorophyll and carotenoid in peel of Cara cara during fruit development were determined and effects of exogenous ABA and GA₃ treatments before colour break on changes of chlorophyll, carotenoid content were also investigated. The results showed that the contents of total chlorophyll and carotenoid in peel of Cara cara reached maximum on Sep.20 and Dec.20 respectively, which was 0.1469mg/g·fw and 0.0321mg/g·fw,respectively. ABA treatment accelerated chlorophyll degradation and inhibited carotenoid accumulation; GA₃ treatment delayed chlorophyll degradation and inhibited carotenoid accumulation and biosynthesis seriously.

Key words: Citus sinensis cv. Cara cara, chlorophyll, carotenoid, ABA, GA₃

摘要： 测定了红肉脐橙果实发育期间果皮叶绿素和总类胡萝卜素含量的变化动态,并在果实转色前用不同浓度的外源ABA和GA₃处理后测定果皮色素含量的变化动态。结果表明,红肉脐橙果皮叶绿素总量于9月20日出现最大值(0.1469mg/gfw),总类胡萝卜素含量于12月20日达到最大值(0.0321mg/gfw);转色前用ABA处理后加速果皮叶绿素的降解,但抑制果皮类胡萝卜素的积累;转色前用GA₃处理后延缓果皮叶绿素的降解,并同样抑制果皮类胡萝卜素的积累,严重阻碍了果皮类胡萝卜素的合成。

关键词: 红肉脐橙, 叶绿素, 类胡萝卜素, ABA, GA₃