Department of Pharmacy, University of Chieti-Pescara, via Vestini 1, 66100 Chieti Scalo, Italy.
Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy.
Molecules. 2020 May 9;25(9):2225. doi: 10.3390/molecules25092225.
The present work evaluates for the first time two Lavandin ( Emeric ex Loisel.) aromatic waters obtained from different plant organs, the flowers and the stems. Both extracts were analysed by GC-MS, which indicates semi-quantitative differences between the major metabolites including linalool, 1,8-cineole, camphor, linalyl acetate and 4-terpineol. H-NMR and LC-MS investigation confirmed the presence of these compounds. Moreover, behavioural tests with the food insect pest (Coleoptera Tenebrionidae) showed a good repellency for both hydrosols extracts with RD values of 3.6 and 3.3 µL cm for the flowers and stems, respectively; at the higher concentrations, however, the hydrosol extract from the flowers is expected to be more effective than the one from the stems. The effect of the flowers and stems aromatic water of Lavandin on seed germination of was also evaluated. Results showed that seed germination was completely inhibited by flowers hydrolate, having a possible application as natural herbicide. The overall experience with these Lavandin extracts indicates the potential of improved hydrolates to become the main distillation products, rather than by-products, of the aromatic plants manufacturing; this stimulates further discussions about the potential positive impacts that such a shift could have in the context of ecopharmacognosy.
本研究首次评估了两种薰衣草（Emeric ex Loisel.）芳香水，它们分别来自不同的植物器官，即花朵和茎。这两种提取物均通过 GC-MS 进行了分析，结果表明包括芳樟醇、1,8-桉叶油醇、樟脑、乙酸芳樟酯和 4-萜品醇在内的主要代谢物存在半定量差异。1H-NMR 和 LC-MS 研究证实了这些化合物的存在。此外，利用食物性害虫（鞘翅目拟步甲科）进行的行为测试表明，两种水提液均具有良好的驱避活性，花朵和茎的水提液驱避率（RD）分别为 3.6 和 3.3 µL cm-2；然而，在较高浓度下，花朵水提液预计比茎水提液更有效。还评估了薰衣草花和茎的芳香水对种子萌发的影响。结果表明，花朵水提液完全抑制了种子的萌发，可能具有天然除草剂的应用潜力。这些薰衣草提取物的综合经验表明，改进的水提液有可能成为芳香植物制造的主要蒸馏产品，而不是副产品；这引发了关于这种转变在生态药理学背景下可能产生的积极影响的进一步讨论。
