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Over 800 lichen products of known chemical structure have been reported in the scientific literature, and most of these compounds are exclusively found in lichens. [1] Examples of lichen products include usnic acid (a dibenzofuran ), atranorin (a depside), lichexanthone (a xanthone), salazinic acid (a depsidone), and isolichenan , an α-glucan .
Many lichens have been used medicinally across the world. A lichen's usefulness as a medicine is often related to the lichen secondary compounds that are abundant in most lichen thalli. Different lichens produce a wide variety of these compounds, most of which are unique to lichens and many of which are antibiotic.
Lichen products are chemical compounds produced by lichens. Pages in category "Lichen products" The following 44 pages are in this category, out of 44 total. ...
A lichen (/ ˈ l aɪ k ən / LIE-kən, UK also / ˈ l ɪ tʃ ən / LI-chən) is a hybrid colony of algae or cyanobacteria living symbiotically among filaments of multiple fungi species, along with yeasts and bacteria [1] [2] embedded in the cortex or "skin", in a mutualistic relationship.
Lichens as bioindicators – lichens are sensitive to various pollutants and can be thus be used as bioindicators. [128] Lichens and air pollution – many lichens are sensitive to various forms of air pollution. [129] Lichens and climate change – the inability of algae to quickly evolve means that climate change may adversely impact lichens ...
One reason the greenshield lichen can be more commonly found than other lichen species is because it is relatively tolerant of pollution. Lichens are often used to monitor air quality.
In Sweden, Cladonia lichens were used historically as a partial insulation for storm windows. [99] The complex net-like structures of the Australasian lichen Pulchrocladia retipora have been described as "of considerable beauty resembling lace or coral", and have been utilised in floral and architectural design. [100]
A chemical spot test can be used to detect the presence of certain lichen products which can be characteristic of a given lichen species. Some components of certain lichens may also fluoresce under ultraviolet light , providing another form of lichen identification test.
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