Chemical composition and biological activities of essential oils and organic extracts from fresh and sun-dried Citrus limon peels

Autor: Kenn Foubert, Luc Pieters, Sahar Ben Youssef, Olfa Taktak, Raoudha Ben Ameur, Noureddine Allouche
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Chemistry Africa
ISSN: 2522-5766
Popis: The present study deals with the characterization of essential oils extracted from both fresh and sun-dried lemon (citrus limon (L.) Burm.f) peels by hydrodistillation, followed by extraction with ether or ethyl acetate, yielding four essential oil samples. The extraction yield varied between 0.1 and 1.65%. The essential oils constituents were identified using GC/MS analysis; limonene was the major compound ranging between 3.75 and 76.78%. In addition, ethyl acetate and methanol extracts were prepared from sun-dried lemon peels, and characterized by HPLC-PDA-ESI-MS. Four flavanoneO-diglycosides (neoreiocitrin, neohespiridin, melitidin and naringin), three flavone di-C-glycosides(diosmetin-6,8-di-C-glycoside, apigenin-6,8-di-C-glycoside, di-C-glycosideflavone), two flavone O-diglycosides (vicenin 2, neodiosmin), three polymethoxyflavones (tangeretin, nobiletin, 5,6,7,4 '-tetramethoxyflavone), and two coumarins (scoparin, isomeranzin) were identified. Lemon peels ethyl acetate extract exhibits a powerful antioxidant activity (IC50 = 0.09 mu g/ mL) compared to those of vitamin E (IC50 = 0.017 mu g/ mL) and BHT (IC50 = 0.026 mu g/ mL). On the other hand, essential oils from fresh and sun-dried lemon peels as well as organic extracts exhibited interesting antimicrobial activities against Bacillus cereus, B. subtilis, Staphylococcus aureus (Gram(+)) and Salmonella enterica, Escherichia coli, Klebsiella pneumoniae (Gram(-)). Lemon peels would be used in the agro-food industry as alternative to the undesirable chemical additives.
Databáze: OpenAIRE
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