晚熟芽变品种-‘奉晚’脐橙与原品种的糖酸及色素代谢差异性分析

bstract In this paper, pigments including chlorophyll a, chlorophyll b and carotenoid, sugars including sucrose, glucose and fructose，acidities including citric and malic acid were analyzed in the late-mature mutant, ‘Fengwan’ navel orange and its parental cultivar, ‘Fengjie72-1’ navel orange at fruit different maturation stages. The results showed that the mature period of ‘Fengwan’ navel orange was delayed for a month or so; the chlorophyll contents in the ‘Fengwan’ orange peel were significantly higher during the early maturation period than in the corresponding tissue of ‘Fengjie72-1’ navel orange，while the carotenoid content was remarkably lower during the late maturation period. No unusual accumulation of chlorophyll, or carotenoid were founded in the peel of Fengwan‘ navel orange, but the significantly change (decrease of chlorophyll and accumulation of carotenoids ) occurred later than ‘Fengjie72-1’ navel orange. As fruit maturation progressed, the sucrose content in the pulp of ‘Fengwan’ navel orange was evidently lower than in the parental line, while the reduced sugar contents including glucose and fructose of the late mature mutant were substantially lower during the late maturation period (after November). Furthermore, higher citric acid content was founded in the pulp of ‘Fengwan’ navel orange from September to November and on February, while the malic acid content was significantly higher than in the pulp of ‘Fengjie72-1’ navel orange during the mature stages except for October 14th