产地及采收期对莲房中原花青素量的影响

目的通过考察不同产地及采收期莲房中原花青素量的变化,确定莲房适宜的产地及采收期,为莲房的合理利用提供依据。方法采集12产地6个采收时期及不同成熟度的莲房样品,采用不同的干燥方法进行干燥,紫外分光光度法测定原花青素量,比较质量分数差异。结果不同成熟度的莲房中的原花青素量具有较大差异,成熟样品质量分数大于幼嫩样品;不同干燥方法对莲房中的原花青素质量分数有较大影响,其中烘干法影响较小,阴干法其次,晒干法影响最大;不同产地和采收期莲房中的原花青素质量分数具有一定差异,呈区间波动特征。结论宜选用与莲子采收保持一致的成熟莲房,采摘后宜采用烘干或阴干法干燥处理,不宜置烈日下暴晒;浙江12产地7~9月份的莲房中的原花青素质量分数大多在6%~8%波动,均可作为莲房资源加以利用。

Influence of Nelumbinis Receptaculum from different regions and picking times on content of proanthocyanidins

Objective To study the contents of proanthocyanidins in Nelumbinis Receptaculum (NR) obtained from the different regions and harvest times, so as to determine the appropriate harvest times and proper planting regions of NR as well as provide the support for the reasonable use of NR. Methods Twelve regions and six different harvest periods in Zhejiang were collected and the contents of proanthocyanidins were determined by UV spectrophotometry. Results Maturity had great influence on the contents of proanthocyanidins, The mature had much more proanthocyanidins than the young. Different drying methods had influence on the contents of proanthocyanidins, among which oven drying method has the least influence, followed by drying in the shade, then suning method has the most influence. There was a certain difference in the contents of proanthocyanidins in NR from the different regions and harvest times with a characteristic interval fluctuations. Conclusion Mature NR should be collected consistent with lotus seeds, the NR should be dried in dryer or in shade, avoid exposing to the sun. The contents of proanthocyanidins in NR from different regions and picking times change in the variation range of 6% to 8%. Wide origin places have been demonstrated suitable to providing the raw materials for industrial production and NR collection is appropriate from the middle of July to September.