琯溪蜜柚果肉中类胡萝卜素组分的特征解析OA北大核心CSTPCD

Guanxi pomelo(Citrus Grandis cv'Guanximiyou')is popular for its sweet and colorful juice sacs.The pigments in juice sacs are mainly carotenoids,whose composition and concentration directly affect the quality of fruits.Characterization of the carotenoid components in juice sacs and their differences under different nutrient management might provide scientific basis for improving fruit quality through nutrient management.In the study,liquid chromatography-tandem mass spectrometry(LC-MS/MS)was used to analyze the carotenoid components in juice sacs;and the effects of different nutrient management on carotenoids were compared between the usage of chemical(CF)and organic(OF)fertilizations.The results showed that the juice sacs contained 23 carotenoids,among them,5 and 18 belonged to carotene and lutein,respectively.The carotenoid in juice sacs was mainly carotene with the concentration as(346.27±69.39)μg/g.Lycopene is the major component of carotenes,which concentration was(332.27±75.05)μg/g and proportion was 95.67%.In addition,fertilization manage-ment significantly affected the concentration of carotenoids.Compared with CF,the concentration of lycopene and(E/Z)-phytoene in OF increased 8.40%and 16.48%,respectively,indicating that nutrient management could affect the pigment in juice sacs of Guanxi pomelo,and thereby might provide references for further regulating fruit quality through nutrient management.