‘北玫’‘北全’葡萄果实中酚类物质比较

Comparison of Phenolic Substances in 'Beimei' and 'Beiquan' Wine Grapes

以贺兰山东麓红色酿酒葡萄免埋土品种‘北玫’和‘北全’为试材,结合主成分(PCA)和正交偏最小二乘判别分析(OPLS-DA)统计学分析,明确果实发育中4个时期单体酚以及采收期酚类物质含量的差异。结果表明,两个品种单宁和花色苷在成熟过程中变化趋势接近,总酚含量积累趋势两者有所不同。黄烷醇类化合物为采收期的主要单体酚,其中黄烷醇、酚酸、黄酮醇类化合物总量均是‘北全’高于‘北玫’,分别是1.18倍、1.13倍和1.32倍,其主要成分分别为儿茶素、绿原酸和芦丁;两品种白藜芦醇含量均呈先上升后下降的趋势,但在转色期间‘北玫’高于‘北全’,而成熟期和采收期为‘北全’显著高于‘北玫’。PCA和OPLS-DA分析表明,黄烷醇类为主要差异物质,与显著性分析结果一致。本研究通过对不同品种酚类物质进行比较分析,发现‘北全’较‘北玫’潜力更大。

Using non-buried red wine grape varieties'Beimei'and'Beiquan'from the eastern foot of Helan Mountains as test materials,the content of individual phenolic substances during the four stages of fruit development and the phenolic substances during harvest were measured,and statistical analysis was conducted using principal component analysis(PCA)and orthogonal partial least squares discriminant analysis(OPLS-DA).The results showed that the changes of tannin and anthocyanins in the two varieties during ripening were similar,while the accumulation trend of total phenol content was different.Xanthanols were the main monomeric phenols during the harvest period,and the total content of xanthanols,phenolic acids,and flavonols were 1.18,1.13,1.32 times higher than that of'Beimei'.The main components were catechin,chlorogenic acid,and rutin,respectively;The resveratrol content of two varieties increased first and then decreased,but the content of resveratrol in'Beiquan'was higher than that in'Beiquan'in veraison period,and the content of resveratrol in'Beiquan'was higher than that in'Beimei'at the maturity and harvesting stage.PCA and OPLS-DA analysis showed that flavanols were the main difference substances,consistent with the significance analysis results.Through comparative analysis of phenolic substances in different varieties,this study found that'Beiquan'variety has more potential than'Beimei'variety.