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Intraspecific chemical variability of the Essential Oils of Moroccan endemic Origanum elongatum L. (Lamiaceae) from its whole natural habitats
Arabian Journal of Chemistry ( IF 5.3 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.arabjc.2018.08.015
Mohamed Bakha , Noureddine El Mtili , Nathalie Machon , Kaoutar Aboukhalid , Fatima Zahra Amchra , Abdelkarim Khiraoui , Marc Gibernau , Félix Tomi , Chaouki Al Faiz

Abstract In this study, the chemical variation of the essential oils of the endemic species Origanum elongatum has been studied in its biogeographical context. Essential oils of 168 individual plants collected from 30 populations growing wild in two Moroccan mountains: Rif and Middle Atlas, were analyzed by GC-FID (Gas Chromatography with Flame Ionization Detector), GC/MS (Gas Chromatography/Mass Spectrometry) and 13 C NMR (Nuclear Magnetic Resonance). Origanum elongatum produces an EOs yielding after hydrodistillation from 0.81% to 3.12% based on the dry weight of the original biomass. 28 compounds were identified, with a majority of oxygenated monoterpenes among them carvacrol, thymol and p -cymene constitute the most represented compounds. Moreover, a great amount of α-terpinene, limonene, thymoquinone and thymohydroquinone were reported in some samples. Four chemical groups have been identified, namely; carvacrol, carvacrol/thymol, carvacrol/ p -cymene and thymol. The geographic distributions of these chemotypes appear to vary since the carvacrol chemotype was the most distributed, while the thymol was found more abundantly in populations from Rif. However, the carvacrol/ p -cymene chemotype was revealed only in Taza region. For the first time the whole chemical picture of the EOs of O. elongatum is presented in relation to their geographical distribution such knowledge is primordial in developing a breeding program in order to protect this species widely and intensively used for both medicinal and food uses but also supply the continuous market needs by producing high quality and stable raw material.

中文翻译:

摩洛哥地方性 Origanum elongatum L.(唇形科)精油从其整个自然栖息地的种内化学变异性

摘要 本研究在生物地理背景下研究了特有物种 Origanum elongatum 精油的化学变异。从摩洛哥两座山(Rif 和 Middle Atlas)的 30 个野生种群中收集的 168 种单株植物的精油通过 GC-FID(带火焰离子化检测器的气相色谱)、GC/MS(气相色谱/质谱)和 13 C 进行分析NMR(核磁共振)。Origanum elongatum 水蒸馏后产生的 EO 产量为原始生物质干重的 0.81% 至 3.12%。鉴定出 28 种化合物,其中大部分含氧单萜烯是香芹酚、百里酚和对伞花烃,是最具代表性的化合物。此外,大量的α-萜品烯、柠檬烯、一些样品中报告了百里醌和百里香氢醌。已确定四个化学基团,即;香芹酚、香芹酚/百里酚、香芹酚/对-伞花烃和百里酚。这些化学型的地理分布似乎有所不同,因为香芹酚化学型分布最多,而百里酚在来自 Rif 的种群中发现的更丰富。然而,香芹酚/对伞花烃化学型仅在塔扎地区被发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。已确定四个化学基团,即;香芹酚、香芹酚/百里酚、香芹酚/对-伞花烃和百里酚。这些化学型的地理分布似乎有所不同,因为香芹酚化学型分布最多,而百里酚在来自 Rif 的种群中发现的更丰富。然而,香芹酚/对伞花烃化学型仅在塔扎地区被发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。已确定四个化学基团,即;香芹酚、香芹酚/百里酚、香芹酚/对-伞花烃和百里酚。这些化学型的地理分布似乎有所不同,因为香芹酚化学型分布最多,而百里酚在来自 Rif 的种群中发现的更丰富。然而,香芹酚/对伞花烃化学型仅在塔扎地区被发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。这些化学型的地理分布似乎有所不同,因为香芹酚化学型分布最广,而百里酚在来自 Rif 的种群中发现的更丰富。然而,香芹酚/对伞花烃化学型仅在塔扎地区被发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。这些化学型的地理分布似乎有所不同,因为香芹酚化学型分布最多,而百里酚在来自 Rif 的种群中发现的更丰富。然而,香芹酚/对伞花烃化学型仅在塔扎地区被发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。香芹酚/对伞花烃化学型仅在 Taza 地区发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。香芹酚/对伞花烃化学型仅在 Taza 地区发现。首次展示了 O. elongatum EOs 的完整化学图片及其地理分布,这些知识对于制定育种计划至关重要,以保护该物种广泛和密集地用于药用和食用用途,但也以优质稳定的原材料供应持续的市场需求。
更新日期:2020-01-01
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