BIOMAT Database Logo BIOMAT Database Logo

Secondary Metabolites and Antioxidant Capacity of the Tunisian Lichen Diploschistes ocellatus (Ascomycota). 2019

Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
University of Tunis El-Manar II, Faculty of Sciences, Unit of Research of Plant Ecology, Campus Academia, 2092 Tunis, Tunisia.

This study, the first to assess the total phenolic, flavonoid, tannins, and proanthocyanidin content of the Tunisian lichen Diploschistes ocellatus, determined the antioxidant capacity in scavenging 2,2 diphenyl-1-picrylhydrazyl (DPPH), as well as the ferric-reducing and iron-chelating powers. The phenolic compound content of D. ocellatus was shown to be related to antioxidant activity. The highest phenolic and flavonoid contents of extracts were obtained with acetone (286.3 μg GAE/g DW and 3.24 μg CE/g DW, respectively), while the highest tannin and proanthocyanidin contents were obtained with methanol (5.5 μg TAE/g DW and 35.12 μg CE/g DW, respectively). The highest DPPH' scavenging capacity and iron-chelating power of extracts were obtained with methanol (concentration providing 50% inhibition [IC50] = 0.029 mg/mL and IC50 = 0.425 mg/mL, respectively), while acetone extracts showed a higher reducing power (IC50 = 0.118 mg/mL).

UI MeSH Term Description Entries
D008011 Lichens Any of a group of plants formed by a symbiotic combination of a fungus with an algae or CYANOBACTERIA, and sometimes both. The fungal component makes up the bulk of the lichen and forms the basis for its name. Lichen
D010636 Phenols Benzene derivatives that include one or more hydroxyl groups attached to the ring structure.
D010851 Picrates Salts or esters of PICRIC ACID.
D002614 Chelating Agents Chemicals that bind to and remove ions from solutions. Many chelating agents function through the formation of COORDINATION COMPLEXES with METALS. Chelating Agent,Chelator,Complexons,Metal Antagonists,Chelators,Metal Chelating Agents,Agent, Chelating,Agents, Chelating,Agents, Metal Chelating,Antagonists, Metal,Chelating Agents, Metal
D005419 Flavonoids A group of phenyl benzopyrans named for having structures like FLAVONES. 2-Phenyl-Benzopyran,2-Phenyl-Chromene,Bioflavonoid,Bioflavonoids,Flavonoid,2-Phenyl-Benzopyrans,2-Phenyl-Chromenes,2 Phenyl Benzopyran,2 Phenyl Benzopyrans,2 Phenyl Chromene,2 Phenyl Chromenes
D000975 Antioxidants Naturally occurring or synthetic substances that inhibit or retard oxidation reactions. They counteract the damaging effects of oxidation in animal tissues. Anti-Oxidant,Antioxidant,Antioxidant Activity,Endogenous Antioxidant,Endogenous Antioxidants,Anti-Oxidant Effect,Anti-Oxidant Effects,Anti-Oxidants,Antioxidant Effect,Antioxidant Effects,Activity, Antioxidant,Anti Oxidant,Anti Oxidant Effect,Anti Oxidant Effects,Anti Oxidants,Antioxidant, Endogenous,Antioxidants, Endogenous
D001203 Ascomycota A phylum of fungi which have cross-walls or septa in the mycelium. The perfect state is characterized by the formation of a saclike cell (ascus) containing ascospores. Most pathogenic fungi with a known perfect state belong to this phylum. Ascomycetes,Cochliobolus,Sclerotinia,Ascomycete,Ascomycotas,Sclerotinias
D001713 Biphenyl Compounds Whitish aromatic crystalline organic compounds made up of two conjoined BENZENE rings. Compounds, Biphenyl
D013634 Tannins Polyphenolic compounds with molecular weights of around 500-3000 daltons and containing enough hydroxyl groups (1-2 per 100 MW) for effective cross linking of other compounds (ASTRINGENTS). The two main types are HYDROLYZABLE TANNINS and CONDENSED TANNINS. Historically, the term has applied to many compounds and plant extracts able to render skin COLLAGEN impervious to degradation. The word tannin derives from the Celtic word for OAK TREE which was used for leather processing. Tannin
D016166 Free Radical Scavengers Substances that eliminate free radicals. Among other effects, they protect PANCREATIC ISLETS against damage by CYTOKINES and prevent myocardial and pulmonary REPERFUSION INJURY. Free Radical Scavenger,Radical Scavenger, Free,Scavenger, Free Radical,Scavengers, Free Radical

Related Publications

Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Antioxidant potential of lichen species and their secondary metabolites. A systematic review.
January 2016, Pharmaceutical biology,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Cytotoxic activity and antioxidant capacity of purified lichen metabolites: an in vitro study.
March 2013, Phytotherapy research : PTR,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
The chemistry of some species of the lichen genus Diploschistes.
January 1971, Mycologia,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
In vitro evaluation of lysozyme activity and antimicrobial effect of extracts from four Tunisian lichens: Diploschistes ocellatus, Flavoparmelia caperata, Squamarina cartilaginea and Xanthoria parietina.
May 2021, Archives of microbiology,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Antioxidant activity of some lichen metabolites.
November 2011, Natural product research,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Antiangiogenic properties of lichen secondary metabolites.
June 2021, Phytotherapy research : PTR,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Bioactive Secondary Metabolites from Fungi of the Genus Cytospora Ehrenb. (Ascomycota).
March 2023, Molecules (Basel, Switzerland),
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Screening Evaluation of Antiproliferative, Antimicrobial and Antioxidant Activity of Lichen Extracts and Secondary Metabolites In Vitro.
January 2023, Plants (Basel, Switzerland),
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Tunisian table olive phenolic compounds and their antioxidant capacity.
May 2008, Journal of food science,
Mohamed Mendili, and Marwa Bannour, and Maria Eduarda M Araújo, and Samira Aschi-Smiti, and Mark R D Seaward, and Ayda Khadhria
Juice components and antioxidant capacity of four Tunisian Citrus varieties.
January 2011, Journal of the science of food and agriculture,
Copied contents to your clipboard!