Lichenochemical Screening and Antioxidant Capacity of Four Tunisian Lichen Species.

Autor: Mendili M; University of Tunis El-Manar II, Faculty of Sciences, Plant Ecology Research Unit, Campus Academia, 2092, Tunis, Tunisia., Bannour M; University of Tunis El-Manar II, Faculty of Sciences, Plant Ecology Research Unit, Campus Academia, 2092, Tunis, Tunisia., Araújo MEM; Faculty of Sciences, Center of Chemistry and Biochemistry, University of Lisbon, Lisboan, Portugal., Seaward MRD; School of Archaeological and Forensic Sciences, University of Bradford, Bradford, BD7 1DP, UK., Khadhri A; University of Tunis El-Manar II, Faculty of Sciences, Plant Ecology Research Unit, Campus Academia, 2092, Tunis, Tunisia.
Jazyk: angličtina
Zdroj: Chemistry & biodiversity [Chem Biodivers] 2021 Feb; Vol. 18 (2), pp. e2000735. Date of Electronic Publication: 2021 Jan 07.
DOI: 10.1002/cbdv.202000735
Abstrakt: The phenolic composition and antioxidant capacity of four Tunisian lichen species, Cladonia rangiformis, Flavoparmelia caperata, Squamarina cartilaginea and Xanthoria parietina, were determined in order to provide a better understanding of their lichenochemical composition. Powdered material of F. caperata was the richest in total phenolic content (956.68 μg GAE g -1 DW) and S. cartilaginea in proanthocyanidin content (77.31 μg CE g -1 DW), while the acetone extract of X. parietina showed the highest flavonoid content (9.56 μg CE g -1 DW). The antioxidant capacity of all lichen extracts and crude material was evaluated by DPPH . scavenging, iron-chelating, and iron-reducing powers. Results showed that methanol extracts of S. cartilaginea had the highest DPPH . antioxidant capacity (IC 50 =0.9 μg mL -1 ) and the highest iron-reducing power was attributed to the acetone extract of this species. All extracts of all species were further screened by Fourier-transform infrared spectroscopy (FT-IR) and nuclear resonance spectroscopy (NMR); results showed an abundance of phenols, aromatic compounds, and fatty acids. Overall, our results showed that the investigated species are a rich source of potentially bioactive compounds with valuable properties.
(© 2021 Wiley-VHCA AG, Zurich, Switzerland.)
Databáze: MEDLINE
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