‘金丝小枣’在生长与成熟过程中活性成分及抗氧化活性变化规律研究

Changes of bioactive compounds and antioxidant capacities of jujube( Zizyphus jujuba) fruit cv ‘Jinsixiaozao'during different growth / ripening stages of growth

摘要: 本文以6个不同生长与成熟期（S1^S6）的‘金丝小枣’为研究对象,通过高效液相色谱测定分析了枣果中的维生素C、酚类物质、环核苷酸、三萜酸、α-生育酚和β-胡萝卜素,同时采用分光光度计法测定了其在不同生长与成熟期的总酚、总黄酮含量以及枣果抗氧化活性。研究结果表明:随着枣果的生长成熟:其总酚、总黄酮、α-生育酚和β-胡萝卜素以及FRAP值、清除DPPH·以及ABTS+·自由基能力均呈现下降趋势;儿茶素和表儿茶素是枣果在生长与成熟过程中主要酚类物质。三萜酸含量在枣果的S3^S4期时最高,而c AMP和c GMP则随着枣果的生长成熟逐渐积累。

Abstract: Changes of ascorbic acid,phenolic compounds,cyclic nucleotides; triterpene acids,α- tocopherol,and β- carotene in jujube fruits during six stages( S1 ~ S6) of growth were analyzed by HPLC and the total phenolics,total flavonoids,and antioxidant capacities were spectrophotometrically investigated. The results showed that the contents of total phenolics,total flavonoids,and the capacities of FRAP,scavenging DPPH·or ABTS~+·were decreased as the jujube fruits developed. Catechin and epicatechin were the predominant phenolic compounds in the whole developmental stages.Levels of c AMP and c GMP were accumulated as the fruit developed and triterpene acids maximized their content during S3~ S4 stage.