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Identification of Secondary Metabolites in Tunisian Tilia platyphyllos *** MALDI-TOF and GC-MS

Journal of Renewable Materials 2024年第4期12卷 827-842页

作者： Ayda Khadhri Mohamed Mendili Marwa Bannour-Scharinger eric masson Antonio Pizzi University of El-Manar II Faculty of SciencesPlantSoilEnvironment Interactions LaboratoryCampus AcademiaTunis2092Tunisia LERMAB University of Lorraine27 Rue Philippe SeguinEpinal88000France

This study is the first to evaluate the phytochemical content and biological properties of Tunisian *** Scop.A total of 23 compounds of essential oils were identified by gas chromatography-mass spectrometry(GC-MS)analysis of bracts and fruit *** results show that oxygenated monoterpenes were the dominant class of essential *** phenolic composition was investigated by matrix-assisted laser desorption/ionizationtime of flight(MALDI-TOF).The analysis showed that the chemical profiles of the ethanolic extracts of bracts and fruits are substantially *** highest polyphenol content was found in the ethanolic extracts of the fruits(7.65 mg gallic acid equivalents(GAE).g−1 on dry weight(DW).As for the antioxidant capacity,it was recorded in the essential oils of the fruits(IC_(50)=0.91 ***^(−1)).The results obtained showed that the antioxidant activity of the fruit essential oil was higher than that of the ethanol *** fruit essential oil was also found to have the highest reducing power(IC_(50)=0.67 ***^(−1)).In terms of iron-chelating power,fruit essential oil has the highest chelating power(IC_(50)=2.03 ***^(−1)).Compared to the ethanolic extract,the essential oil had the maximum antioxidant *** enzymatic activity of acetylcholinesterase(AChE)inhibition of the essential oil from *** bracts had the most potent inhibitory effect(IC_(50)=0.77 ***^(−1)),followed by the essential oil from the fruits(IC_(50)=0.95 ***^(−1)).The results suggest that *** can be used as a potential source of naturally occurring bioactive compounds and antioxidants.

关键词： T.platyphyllos antioxidant activity acetylcholinesterase inhibition essential oil MALDI-TOF GC-MS

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Comparison of Essential Oil Composition,Phenolic Compound and Biological Activities of Salvia microphylla and Teucrium polium(Lamiaceae)

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Journal of Renewable Materials 2022年第6期10卷 1607-1621页

作者： Ayda Khadhri Chedia Aouadhi eric masson Antonio Pizzi Plant Soil and Environment Interactions LaboratoryFaculty of SciencesUniversity of El-Manar IITunisTunisia Bacteriology and Biotechnology Development Groups Epidemiology Laboratory and Veterinary MicrobiologyPasteur Institute of TunisUniversity of El-Manar IITunisTunisia CRITTBois EpinalFrance LERMAB University of LorraineEpinalFrance Department of Physics King Abdulaziz UniversityJeddahSaudi Arabia

Salvia microphylla and Teucrium polium are medicinal and aromatic plants with ethnobotanical *** present study was conducted to investigate the chemical composition of Salvia microphylla and Teucrium polium essential oils,the secondary metabolites,and the biological activities of their infusion and methanolic(MeOH)*** oils were extracted by hydrodistillation from shoots Salvia microphylla and Teucrium *** content,antioxidant and antimicrobial activities were *** chromatography-mass spectrometry(GCMS)results showed the presence of significant qualitative and quantitative variations for the composition of the both essential oils(EO).Salvia microphylla EO were most complex and present 70 compounds with the major components wereβ-caryophyllene(13.32%),1,8 cineole(11.25%),Cis p-Menthane-3-one(10.74%),andβ-Selinenol(9.71%).Where in the Teucrium polium EO,45 compounds were identified with the important components areβ-cadinene(10%),β-citronellol(8.5%),Carvacrol(7.63%),and Eugenol(7.15%).Obtained results showed that both plant are very rich in secondary *** isolated from Salvia microphylla presented the highest contents in the phenolic compound than extracted from Teucrium *** antioxidant activity data demonstrated that all extracts showed strong antioxidant and radical scavenging *** oil and methanol extracts presented a potential for antimicrobial activities against all tested *** obtained results highlight the potential use of Salvia microphylla and Teucrium polium as possible natural antioxidant substances and sources of bioactive molecules.

关键词： Salvia microphylla Teucrium polium phenolic compounds antioxidant antimicrobial activity essential oil

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