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Phenolic levels in Umbilicaria Americana in Relation to Enzyme Polymorphism, Altitude and Sampling Date

Published online by Cambridge University Press:  28 March 2007

Andrew Swanson ,
Dianne Fahselt  and
Dale Smith
Andrew Swanson
Affiliation:
Department of Plant Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada
Dianne Fahselt
Affiliation:
Department of Plant Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada
Dale Smith
Affiliation:
Department of Plant Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada
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Abstract

A significant negative correlation was found between the quantity of acetone-extractable phenolic compounds and the degree of enzyme polymorphism in eight eastern North American populations of Umbilicaria americana. In sites higher elevations, where UV irradiance was more intense, phenolic levels were significantly lower and within-stand enzyme variability significantly greater than in low elevation sites. Similarly, the phenolic content of thalli collected in Ontario, Canada, over a 16-month sampling period was negatively correlated with mean monthly UV-B irradiance.

Type
Research Article
Information
The Lichenologist , Volume 28 , Issue 4 , July 1996 , pp. 331 - 339
Copyright
Copyright © British Lichen Society 1996

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