Checklist of the lichens and lichenicolous fungi of Tunisia

Seaward, M. R. D.; Khadhri, Ayda; Amrani, Saïd

doi:10.13158/heia.34.2.2021.400

Cited by 5 publications

(7 citation statements)

References 24 publications

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“…[16] However, most studies have been conducted to explore their diversity. [16] Besides, the focus of the studies has been on their use as bioindicators of air pollution. [17] However, studies on the chemistry of lichens from Tunisia, which present a rich diversity, are limited.…”

Section: Introductionmentioning

confidence: 99%

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Anti‐Inflammatory Potential of Compounds Isolated from Tunisian Lichens Species

Greca

Mendili

Khadhri

et al. 2022

Chemistry & Biodiversity

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The lichen's special symbiotic structure enables it to produce bioactive substances. They have historically been recognized for their aesthetic and medicinal benefits. Furthermore, in recent years, they have performed in various fields, including perfumery, dyeing, and pharmacology due to their rich secondary metabolites. From our study, four compounds were isolated from organic extracts of Parmotrema hypoleucinum, Roccella phycopsis, and Xanthoria parietina and identified by spectroscopic investigation as atranorin, (+)-iso-usnic acid, methyl orsellinate, and parietin, respectively. The anti-inflammatory effects of lichens extracts, and pure compounds were evaluated on RAW 264.7 macrophages cells at different concentrations. At 25 μg/mL all treated samples did not show any effect on cell viability. Atranorin and (+)-iso-usnic acid showed an inhibitory effect on nitric oxide (NO) levels in lipopolysaccharide (LPS)-stimulated macrophages. Nitric oxide (NO) production was measured using Griess reagent, atranorin and (+)-iso-usnic acid showed a high anti-inflammatory potential (75.99 % and 57.27 % at 25 μg/mL). On the other hand, methyl orsellinate and the organic extracts of three lichens showed good anti-inflammatory activity ranging from 29.16 % at 25 μg/mL to 86.91 % at 100 μg/mL.

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Section: Introductionmentioning

confidence: 99%

“…Tunisia contains a list of 644 taxa of lichens [16] . However, most studies have been conducted to explore their diversity [16] . Besides, the focus of the studies has been on their use as bioindicators of air pollution [17] .…”

Section: Introductionmentioning

confidence: 99%

Anti‐Inflammatory Potential of Compounds Isolated from Tunisian Lichens Species

Greca

Mendili

Khadhri

et al. 2022

Chemistry & Biodiversity

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“…Distribution: Northern Africa, Tunisia and Morocco ( Werner (1955), Seaward et al (2021), Werner (1948), Southern Europe and Central Asia ( Clauzade 1981).…”

Section: Resultsmentioning

confidence: 99%

Records of new and overlooked lichens from the Saïda province (Western Algeria)

Mouedden,

Ayache,

Khedim

et al. 2023

Herzogia

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Mouedden, R., Ayache, A., Khedim, R., Motiejūnaitė, J. & Ayad, N. 2023. Records of new and overlooked lichens from the Saïda province (Western Algeria). – Herzogia 36: 72–83.Eighty five lichens are reported for the first time from Doui-Thabet forest, Saïda province, Algeria, four of them (Acarospora aeginaica, Acarospora calcivora, Acarospora pitardii, Acarospora xanthophana) are new to Algeria. Of them Acarospora aeginaica is reported for the first time to north Africa. Ten of the recorded species are protected under the Algerian endangered species legislation. For all newly recorded species descriptions of morphology, anatomy, ecology and distribution are provided.

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“…Elsewhere on the continent, North African lichenology a long history, dating back to 1798 in Algeria. Checklists have recently been prepared for Algeria (Amrani et al 2015(Amrani et al , 2018 and Tunisia (Seaward et al 2021) and there have been some inventories carried out in Morocco (Mohamed et al 2021) and Egypt (Hegazy 2012). Unfortunately, recent references to the ecology, physiology or taxonomy of West African lichens are less easy to locate.…”

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confidence: 99%

“…2015, 2018) and Tunisia (Seaward et al . 2021) and there have been some inventories carried out in Morocco (Mohamed et al . 2021) and Egypt (Hegazy 2012).…”

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confidence: 99%