Quilhot, WandaPeña, WenceslaoFlores, EvaHidalgo, María ElianaFernández, ErnestoLeighton, Gerardo2017-01-112017-01-111991Serie Científica, nº 41, pp. 99-106, 1991http://hdl.handle.net/20.500.11894/788In Usnea aurantiaco-atra (Jaq.) Bory, growing in the Antarctica, a monthly variation in the usnic acid content, in individual thalli, was studied by means of scanning densitometry (HPTLC). The higher accumulation rates were quantified from January to May; there was a significant decrease in the concentrations from June to December, during the three years of study. In spite of the thalli were taken from a same location, variations could be observed in the usnic acid concentration in the individuals from within each monthly sampleenLicencia Creative Commons. Reconocimiento – NoComercial (by-nc): Se permite la generación de obras derivadas siempre que no se haga un uso comercial. Tampoco se puede utilizar la obra original con finalidades comerciales.LíquenesMetabolitos de líquenesÁcido úsnicoArtículo