莲中总酚含量与分布研究

目的]研究不同品种莲藕中总酚的含量和分布。方法]以鄂莲系列莲藕为材料,采用分光光度法测定其总酚含量并分析总酚含量分布。结果]荷叶的总酚含量明显高于其他部位,莲不同部位的总酚含量顺序为：荷叶〉荷花〉荷梗〉地下茎。荷叶中总酚含量是地下茎的12倍左右。12个品种荷叶中的总酚含量差异显著,其荷梗中的总酚含量差异不显著。4个品种花蕾中的总酚含量差异不显著。莲藕藕节中的总酚含量明显高于其他部位,其不同部位的总酚含量依次为：藕节〉藕尾〉藕头〉藕中。鄂莲一号、鄂莲二号、鄂莲三号、鄂莲四号和鄂莲五号的莲藕总酚含量差异显著。同一品种莲藕不同部位的总酚含量差异显著。结论]该研究为莲藕资源的开发利用提供了理论依据。

Study on the Content and Distribution of Total Phenols in Lotus

Objective]The purpose was to study the content and distribution of total phenols in lotus roots of different varieties.Method]With lotus roots of E’lian series as materials,the contents of total phenols were determined by spectrophotometric method and their content distributions were analyzed.Result]The content of total phenols in lotus leaf was obviously higher than that in other parts and the content sequence of total phenols in different parts of lotus was lotus leaf > lotus flower > lotus petiole petiolus > subterraneous stem.The content of total phenols in lotus leaf was about 12 times of that in subterraneous stem.The contents of total phenols in lotus leaves of 12 varieties had significant difference and that in lotus petiole petiolus had no significant difference.The contents of total phenols in flower buds of 4 varieties had no significant difference.The contents of total phenols in nodus rhizomatis loti was obviously higher than that in other parts of lotus root and the content sequence of total phenols in different parts of lotus root was nodus rhizomatis loti > tails of lotus roots > heads of lotus roots > middle part of lotus root.The contents of total phenols in lotus roots of Elian No.1,No.2,No.3,No.4 and No.5 had significant difference and that in different parts of same variety had significant difference.Conclusion]This study provided theoretical foundation for exploitation of lotus roots resources.