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Mineral Cycling and Lichens: The Physiological Basis

Published online by Cambridge University Press:  28 March 2007

Dennis H. Brown  and
Rosalie M. Brown
Dennis H. Brown
Affiliation:
Department of Botany, The University, Bristol BS8 1UG, UK
Rosalie M. Brown
Affiliation:
Department of Botany, The University, Bristol BS8 1UG, UK
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Abstract

A number of physiological processes relevant to the role of lichens in mineral cycling are discussed. Consideration is given to the cellular location of positively-charged cations, showing (a) the benefits of quantifying intracellular elements for the interpretation of toxic metal stress, and (b) how distribution patterns of physiologically essential elements may be altered by desiccation and rehydration under field and laboratory conditions. The quantitative significance of these dynamic processes associated with metal uptake and loss requires verification under field conditions. A modified sequential elution procedure is proposed that enables quantification of insoluble paniculate mineral matter (acquired by wet and dry deposition) in addition to soluble elements in intercellular, extracellular-exchangeable and intracellular sites.

Type
Research Article
Information
The Lichenologist , Volume 23 , Issue 3 , July 1991 , pp. 293 - 307
Copyright
Copyright © British Lichen Society 1991

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