【摘要】 为初步探明枳砧促进沃柑果实早熟的品质和代谢基础，在广西南宁产区同一生产基地沃柑成熟初期(12月中旬)采集枳砧和资阳香橙砧沃柑果实样品，分别测定品质、果皮色泽和类胡萝卜素物质种类及含量，分析其差异性。结果表明，枳砧沃柑果皮色泽a~*值、综合着色指数CCI值分别比资阳香橙砧的高6.93和2.94,差异均达极显著。枳砧沃柑果皮中检测到类胡萝卜素代谢物49种，比资阳香橙砧沃柑果皮多2种，其中38种物质含量较高，包括八氢番茄红素、β-柠乌素等呈红色色素，且14种物质含量差异显著。枳砧沃柑果皮总类胡萝卜素含量为187.44μg/g,比资阳香橙砧高40.50μg/g。枳砧沃柑果肉有机酸含量较低、固酸比较高，与资阳香橙砧差异均达显著水平。枳砧沃柑果皮较早积累类胡萝卜素，致果面颜色更红，着色更好，果肉能较快降解有机酸，口感更佳，即枳砧促进了沃柑果实早熟。在南宁，生产上适当选择枳做砧木，有利于沃柑提早上市，拉长采收期。更多还原

【Abstract】 To preliminarily explore the quality and metabolic basis of advanced coloring and maturation of Orah grafted on Poncirus trifoliata rootstock, Orah fruit samples grafted on P. trifoliata rootstock and Ziyang Xiangcheng rootstock were collected at the early stage of maturation(mid-December) from the same production field in Nanning, Guangxi. The fruit quality traits, peel color and carotenoid contents were determined, and the differences among the samples were analyzed. The results showed that the a~* value and comprehensive color index(CCI) of the peel of Orah citrus grafted on P. trifoliata rootstock were 6.93 and 2.94 higher than those on Ziyang Xiangcheng rootstock, respectively, and the differences were extremely significant. A total of 49 carotenoid metabolites were detected in the peel of Orah grafted on P. trifoliata rootstock, with 2 more components than those of on Ziyang Xiangcheng rootstock. Among them, 38 substances exhibited higher contents in the fruit peels of Orah on P. trifoliata, including phytoene, β-limonene and other red color pigments, and the contents of 14 substances were significantly different. The total carotenoid content in the peels of Orah grafted on P. trifoliata rootstock was 187.44 μg/g, 40.50 μg/g higher than that on Ziyang Xiangcheng rootstock. The organic acid content of the pulp of Orah grafted on P. trifoliata rootstock was low, with high solid acid ratio, which was significantly different from those on Ziyang Xiangcheng rootstock. Accumulation of carotenoids in the peel of Orah on trifoliate orange rootstock was earlier, resulting in more intensive red color fruit surface and better coloration, with faster degradation of organic acids in the pulp and better taste. It means that P. trifoliata rootstock promoted the early maturation of Oran fruit. In Nanning, proper use of P. trifoliata as rootstock in production is conducive to the early marketing and an extended harvest period of Orah.更多还原