Lippia integrifolia: Are there morphological, anatomical and biochemical differences among chemotypes?
Lippia integrifolia: Are there morphological, anatomical and biochemical differences among chemotypes?
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DOI：
10.1016/j.indcrop.2020.112610
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发表时间：
2020-10
影响因子：
5.9
通讯作者：
M. I. Mercado;E. Lizarraga;Victoria Coll Araoz;C. Catalán;G. Font de Valdez;G. Marcial
中科院分区：
文献类型：
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作者：
M. I. Mercado;E. Lizarraga;Victoria Coll Araoz;C. Catalán;G. Font de Valdez;G. Marcial
Lippia integrifolia，俗称“incayuyo”，是一种传统的芳香和药用植物，生长在阿根廷西北部。该物种的水提取物对胃肠道的影响，主要是胃炎症发挥有益的作用。在广泛分布的L.在全缘叶的植物中，精油组成具有高度的可变性，并且基于其精油组成中的主要萜类化合物，已经表征了四种化学型：反式橙花叔醇、lippiafolienone、spathulenol/byciclogermacrene和反式davanone。本文对不同化学型L.全缘叶进行了比较评价。以反式橙花叔醇为主的化学型叶片毛状体密度高，水提物得率高。在不同化学型的水提取物中，仅发现主要代谢物的数量变化;这些化合物被表征为6-甲氧基木犀草素-O-己糖苷、6-甲氧基小盾叶芹素-己糖苷、B环-二甲氧基化黄酮-己糖苷I、II和lippidulcine-A。尽管反式橙花叔醇化学型样品的酚类和类黄酮含量较高，但与其他化学型样品相比，反式橙花叔醇化学型样品具有相似的抗氧化性能。此外，组织化学的trans-nerolidol化学型的叶进行了分析。trans-nerolidol化学型，自然生长在省的拉里奥哈（波多黎各阿莱格雷），提出了最好的品质为药用的物种，由于其较高的产量在水提取物和较高的酚类和类黄酮含量。
Lippia integrifolia,commonly known as “incayuyo”, is a traditional aromatic and medicinal plant that grows wild in northwestern Argentina. Aqueous extracts of this species exert beneficial effects against affections of the gastrointestinal tract, mainly gastric inflammations. Across the wide distribution ofL. integrifolia, there is a high variability in the essential oil composition and four chemotypes have been characterized based on the dominant terpenoids in their essential oil composition:trans-nerolidol, lippiafolienone, spathulenol/byciclogermacrene andtrans-davanone. In the present work, the morphology, anatomy, chemical constituents and biochemical properties of the aqueous extract of different chemotypes ofL. integrifoliawere evaluated comparatively. The chemotype whose essential oil is dominated bytrans-nerolidol showed significantly higher density of trichomes on the leaves and higher yield in aqueous extractions. Only quantitative variations of dominant metabolites in the aqueous extracts were found among the different chemotypes; those compounds were characterized as 6-methoxyluteolin-O-hexoside, 6-methoxyscutellarein-hexoside, B ring-dimethoxylated flavone-hexoside I, II and lippidulcine-A. In spite of the higher phenolic and flavonoid content,trans-nerolidol chemotype sample presented similar antioxidant properties compared with the other chemotypes. Additionally, the histochemistry of leaves of thetrans-nerolidol chemotype was analyzed.Thetrans-nerolidol chemotype, which grows naturally in the province of La Rioja (Puerto Alegre), presents the best qualities for the medicinal use of the species, due to its higher yield in aqueous extractions and higher phenolic and flavonoid content.