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Lichen product
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Lichen products, also known as lichen substances, are organic compounds produced by a lichen. Specifically, they are secondary metabolites. Lichen products are represented in several different chemica
Lobaria pulmonaria, a lichen that contains lichen products such as stictic acid and gyrophoric acid.
Lobaria pulmonaria, a lichen that contains lichen products such as stictic acid and gyrophoric acid.
Spot test (lichen)
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A spot test in lichenology is a spot analysis used to help identify lichens. It is performed by placing a drop of a chemical reagent on different parts of the lichen and noting the colour change assoc
Lichen product
…harvest secondary metabolites from lichen samples. Many lichen products can be screened with simple chemical tests long used in lichen identification. In spot tests, a small amount of reagent is applied directly to the thallus (or to a particular layer, such as the outer cortex or inner medulla) and any colour…
Spot tests on the foliose lichen Punctelia borreri showing thallus (top) and medulla (bottom). The pinkish-red colour change of the medulla in the C a
Spot tests on the foliose lichen Punctelia borreri showing thallus (top) and medulla (bottom). The pinkish-red colour change of the medulla in the C and KC tests indicate the presence of gyrophoric acid, a chemical feature that helps to distinguish it from similar species in the same genus.
Chemical spot tests on the crustose and saxicolous lichen Aspicilia epiglypta
Chemical spot tests on the crustose and saxicolous lichen Aspicilia epiglypta
UV-illuminated thallus and apothecia of the crustose lichen Ochrolechia africana; the yellowish colour results from the fluorescence of lichexanthone.
UV-illuminated thallus and apothecia of the crustose lichen Ochrolechia africana; the yellowish colour results from the fluorescence of lichexanthone.