Identification of two chemotypes for essential oils and floral waters of Mentha spicata L. from two localities of Senegal
2024
Diop, Serigne Mbacké | Ndiaye, El Hadji Barka | Genva, Manon | Thiam, Abdoulaye | Fauconnier, Marie-Laure | Gueye, Momar Talla
英语. peer reviewed
显示更多 [+] 显示较少 [-]英语. The aim of the study is to determine the chemical composition of essential oils (EOs) and floral waters (FWs) in Mentha spicata L. from Senegal. For this purpose, extractions were conducted by steam distillation from both fresh (F) and dried (D) plants harvested in Dakar and Kaolack regions, Senegal. Essential oils and floral waters obtained were analyzed by gas chromatography GC/FID-MS Results showed that EOs and FWs were characterized by the same prominent components. In the oils from Dakar, it is noted an abundance of carvone which represented 64.4 (F) and 59.8% (D), limonene 11.7 (F) and 11.9% (D) and 1.8-cineole 4.4 (F) and 4.4% (D). This composition is typical for M. spicata. The corresponding FWs also contained mainly carvone 81.1 (F) and 80.2% (D). For Kaolack, EOs were dominated by pulegone 35.3 (F) and 35.8% (D), piperitenone 24.5 (F) and 24.6% (D), 1.8-cineole 11.5 (F) 11.0% (D) and limonene 5.5 (F) and 6.6 % (D). In our best knowledge, this chemotype was not reported for M. spicata. Their FWs contained: 66.1 (F) and 67.2% (D) of piperitenone, (19.2 (F) and 18.8% (D) of pulegone. Futhermore, chiral chromatography revealed the presence of pure enantiomers: (S)-(-)-limonene, (R)- (-)-carvone and (R)-(+)-pulegone in the oils.
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