Laboratory of the Improvement of Agricultural Production, Biotechnology and the Environment, Faculty of Sciences, Mohammed First University, BP 717, Oujda 60000, Morocco.
Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health, Faculty of Sciences, Mohammed First University, BP 717, Oujda 60000, Morocco.
ScientificWorldJournal. 2022 Mar 26;2022:6367663. doi: 10.1155/2022/6367663. eCollection 2022.
This study examined the secondary metabolite content and the antioxidant activities of hydromethanolic L. leaves extracts at different altitudes. The results indicated that the contents of polyphenols and flavonoids were significantly ( ≤ 0.05) high in the low altitude, unlike the Chl (chlorophyll), tannins, and ascorbic acid, which were reported to have higher content in the high altitude. These results showed that the L. is more adaptable to higher elevations than low elevation, where the plant was probably stressed. On the other hand, the analyses of correlation between the antioxidant activity and phytochemical content affirmed that the antiradical activity (DPPH) correlated with the content of polyphenols; however, the total antioxidant activity is correlated with the flavonoid content. These results revealed the importance of L. leaves as a natural antioxidant and gave an idea of the altitude effect on the biochemical parameters of leaves.
本研究考察了不同海拔高度下的甲醇水提 L. 叶提取物的次生代谢产物含量和抗氧化活性。结果表明，低海拔地区的多酚和类黄酮含量显著较高（≤0.05），而叶绿素（Chl）、单宁和抗坏血酸的含量则在高海拔地区较高。这些结果表明，L. 比低海拔地区更能适应高海拔地区，因为在低海拔地区，植物可能受到胁迫。另一方面，抗氧化活性与植物化学物质含量之间的相关性分析证实，自由基清除活性（DPPH）与多酚含量相关，而总抗氧化活性与类黄酮含量相关。这些结果揭示了 L. 叶作为天然抗氧化剂的重要性，并说明了海拔对叶片生化参数的影响。
