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Quantitative variations of phenolic compounds related to thallus age in Umbilicaria antarctica in Antarctica
Entry ID: 110-88_02

Abstract: Densitometric analysis (HPTLC) was used to determine the concentrations of
phenolic metabolites in thalli of different ages in Umbilicaria antarctica Frey
et Lamb. Usnic acid and atranorin concentrations are highest in individuals of
the youngest age class and decrease towards the oldest age classes, whereas
gyrophoric acids is more abundant in intermediate age clases. Usnic acid and
atranorin are present in isolated rhizines. The importance of the spatial
distribution of atranorin and usnic acid in this species is discussed.
Geographic Coverage
Spatial coordinates   
  N: -62.22   S: -62.22   E: -59.42   W: -59.42

Data Set Citation
Dataset Originator/Creator: Wanda Quilhot et al
Dataset Title: Lichen secondary products and their importance in environmental studies
Dataset Release Date: 1998-05-01
Dataset Release Place: Sao Paulo, Brazil
Dataset Publisher: Seaward (Eds)
Version: 1
Issue Identification: Lichenology in Latin America: history, current knowledge and applications
Data Presentation Form: Tables and graphics
Temporal Coverage
Start Date: 1989-01-05
Stop Date: 1989-02-20
ISO Topic Category
Quality The data set consist of 440 individuals de Umbilicaria antarctica that were
collected from Robert Island, South Shetland Island, growing on a surface of
rock at 100-110 m.a.s.l.The lichen material was air dried at room temperature
and packed in paper bags until required. The specimens were dried in an oven at
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Access Constraints Public data
Use Constraints Public data
Data Center
Centro Nacional de Datos Antarticos, Instituto Antartico Chileno, Chile Supplemental Info
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Phone: ++56 /61/ 298135
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City: Punta Arenas
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Email: djorquer at
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City: Santiago
Country: Chile
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Quilhot, W., Sagredo, M.G., Campalans, E., Hidalgo M.E., Pena W., Fernandez and Piovano M. (1991), Quantitative variations of phenolic compounds related to thallus age in Umbilicaria antarctica
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Creation and Review Dates
DIF Creation Date: 2005-03-11
Last DIF Revision Date: 2018-02-05