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Lichenochemical Screening and Antioxidant Capacity of Four Tunisian Lichen Species
Chemistry & Biodiversity ( IF 2.9 ) Pub Date : 2021-01-07 , DOI: 10.1002/cbdv.202000735
Mohamed Mendili 1 , Marwa Bannour 1 , Maria Eduarda M Araújo 2 , Mark R D Seaward 3 , Ayda Khadhri 1
Affiliation  

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 (IC50 =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.

中文翻译:

四种突尼斯地衣物种的地衣化学筛选及抗氧化能力

确定了四种突尼斯地衣物种的酚类成分和抗氧化能力,Cladonia rangiformis、Flavopparmelia caperata、Squamarina cartilaginea 和 Xanthoria parietina,以便更好地了解它们的地衣化学成分。F. caperata 粉末材料的总酚含量最高(956.68 μg GAE g-1 DW),S. cartilaginea 原花色素含量(77.31 μg CE g-1 DW),而 X. parietina 的丙酮提取物最高类黄酮含量(9.56 μg CE g-1 DW)。通过DPPH评估所有地衣提取物和粗材料的抗氧化能力。清除、铁螯合和铁还原能力。结果表明,S. cartilaginea 的甲醇提取物具有最高的 DPPH。抗氧化能力(IC50 = 0. 9 μg mL-1 ) 和最高的铁还原能力归因于该物种的丙酮提取物。通过傅里叶变换红外光谱(FT-IR)和核磁共振光谱(NMR)进一步筛选所有物种的所有提取物;结果显示含有丰富的酚类、芳香族化合物和脂肪酸。总体而言,我们的结果表明,所研究的物种是具有宝贵特性的潜在生物活性化合物的丰富来源。
更新日期:2021-01-07
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