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Imen Ben Haj Yahia
Laboratory of Plant Biotechnology, Department of Biology, National Institute of Applied Science and Technology, B.P. 676, Tunis CEDEX 1080, Tunisia;(R.J.);(M.B.);(I.B.H.Y.)

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Journal article
Published: 28 October 2019 in Antioxidants
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: Twelve Tunisian Thymus algeriensis populations growing wild in different bioclimatic zones, extending from the subhumid to the upper-arid bioclimates, were compared regarding their phenolic composition and their ability to serve as antioxidant, anti-acetylcholinesterase, and antibacterial agents. A significant variation of phenol profile was observed between the analyzed populations, as assessed by ultra-high-performance liquid chromatography coupled with a diode array detector and an electrospray mass spectrometer (UHPLC-DAD-ESI/MSn) technique. Rosmarinic acid was the main phenolic compound in most populations (383.8–1157.8 µg/mL extract), but still, those from the upper-arid bioclimatic zone were distinguished by the presence of carvacrol (1374.7 and 2221.6 µg/mL extract), which was absent in the remaining ones. T. algeriensis methanolic extracts were found to possess a substantial antioxidant and anti-acetylcholinesterase activities, with significant variation observed between populations, which were correlated to their phenolic contents. The antibacterial activity of the extracts tested against seven bacteria was revealed only by populations collected from upper-arid bioclimate and mainly associated with the presence of carvacrol. Extracts revealed a bacteriostatic effect against all bacteria (MIC = 1.4 mg/mL). Yet, the bactericidal activity (MBC = 1.4mg/mL) was restricted to the gram-negative bacteria Escherchia coli.

ACS Style

Rym Jaouadi; Artur M. S. Silva; Mohamed Boussaid; Imen B. H. Yahia; Susana M. Cardoso; Yosr Zaouali. Differentiation of Phenolic Composition Among Tunisian Thymus algeriensis Boiss. et Reut. (Lamiaceae) Populations: Correlation to Bioactive Activities. Antioxidants 2019, 8, 515 .

AMA Style

Rym Jaouadi, Artur M. S. Silva, Mohamed Boussaid, Imen B. H. Yahia, Susana M. Cardoso, Yosr Zaouali. Differentiation of Phenolic Composition Among Tunisian Thymus algeriensis Boiss. et Reut. (Lamiaceae) Populations: Correlation to Bioactive Activities. Antioxidants. 2019; 8 (11):515.

Chicago/Turabian Style

Rym Jaouadi; Artur M. S. Silva; Mohamed Boussaid; Imen B. H. Yahia; Susana M. Cardoso; Yosr Zaouali. 2019. "Differentiation of Phenolic Composition Among Tunisian Thymus algeriensis Boiss. et Reut. (Lamiaceae) Populations: Correlation to Bioactive Activities." Antioxidants 8, no. 11: 515.

Journal article
Published: 26 June 2019 in Molecules
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Phenolic profiling of ten plant samples of Mentha rotundifolia (L.) Huds. collected from different bioclimatic areas of Tunisia, was for the first time carried out by using a fast ultra-high-performance liquid chromatography (UHPLC)-high resolution tandem mass spectrometry (HRMS/MS) method on a Q Exactive platform equipped with an electrospray ionization (ESI) source. An intraspecific, interpopulation variability was evidenced and a total of 17 polyphenolic metabolites were identified and quantified by using the UHPLC-HRESIMS/MS method, here validated for specificity, linearity, limit of detection, limit of quantitation, accuracy and precision. The quantitative method resulted sensitive at the nM level and reliable for rapid polyphenol quantification in vegetal matrices. The metabolomic study allowed us to identify a new compound, named salvianolic acid W, which was isolated and characterized mainly by NMR and MS analysis. A statistical correlation of the phenolic composition with antioxidant and anti-acetylcholinesterase activities was provided.

ACS Style

Imen Ben Haj Yahia; Yosr Zaouali; Maria Letizia Ciavatta; Alessia Ligresti; Rym Jaouadi; Mohamed Boussaid; Adele Cutignano. Polyphenolic Profiling, Quantitative Assessment and Biological Activities of Tunisian Native Mentha rotundifolia (L.) Huds. Molecules 2019, 24, 2351 .

AMA Style

Imen Ben Haj Yahia, Yosr Zaouali, Maria Letizia Ciavatta, Alessia Ligresti, Rym Jaouadi, Mohamed Boussaid, Adele Cutignano. Polyphenolic Profiling, Quantitative Assessment and Biological Activities of Tunisian Native Mentha rotundifolia (L.) Huds. Molecules. 2019; 24 (13):2351.

Chicago/Turabian Style

Imen Ben Haj Yahia; Yosr Zaouali; Maria Letizia Ciavatta; Alessia Ligresti; Rym Jaouadi; Mohamed Boussaid; Adele Cutignano. 2019. "Polyphenolic Profiling, Quantitative Assessment and Biological Activities of Tunisian Native Mentha rotundifolia (L.) Huds." Molecules 24, no. 13: 2351.