"Gheorghe Asachi" Technical University of Iasi, Faculty of Chemical Engineering and Environmental Protection, 700050 Iasi, Romania; INRA, University of Avignon, UMR408 Safety and Quality of Plant Products, F-84000 Avignon, France.
INRA, University of Avignon, UMR408 Safety and Quality of Plant Products, F-84000 Avignon, France.
Food Chem. 2018 Jun 30;252:356-365. doi: 10.1016/j.foodchem.2018.01.052. Epub 2018 Jan 9.
Fruits and aerial parts of lingonberry could be better developed as dietary supplements if the composition in bioactive phenolic compounds and the best period for collection were known. UPLC/MS analysis revealed the predominant presence of arbutin in leaf and that of flavanols in stems harvested in May, July and September. Anthocyanins, flavanols and benzoic acid derivatives were equally present in fruits. Stem and leaf are highly homologous with (+)-catechin, A- and B-type dimers/trimers, and two quercetin glycosides as major contributors. No or only weak seasonal variations were highlighted for all phenolic classes. Additionally, flavanol oligomers showed a lower mDP for fruit (3-4) than for stem and leaf (4-6). The rate of A-type linkage was 3-5% with A-type subunits in extension mainly. Finally, the content in phenolic compounds (UPLC) correlated well with TPC and the DPPH radical scavenging activity although leaf and stem constituents reacted differently in both antioxidant tests.
如果知道生物活性酚类化合物的组成和最佳采集期，越橘的果实和地上部分可以更好地开发为膳食补充剂。UPLC/MS 分析表明，叶子中主要含有熊果苷，5 月、7 月和 9 月采集的茎中主要含有黄烷醇。花色苷、黄烷醇和苯甲酸衍生物在果实中含量相等。茎和叶与（+）-儿茶素、A 型和 B 型二聚体/三聚体以及两种槲皮苷糖苷高度同源，是主要成分。所有酚类物质均未表现出明显的季节性变化或仅表现出较弱的季节性变化。此外，与茎和叶（4-6）相比，果实中的黄烷醇低聚物的 mDP 较低（3-4）。A 型连接的速率为 3-5%，主要是 A 型亚基延伸。最后，酚类化合物的含量（UPLC）与 TPC 和 DPPH 自由基清除活性密切相关，尽管叶子和茎的成分在两种抗氧化测试中的反应不同。
