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Algal stacks and fungal stacks as adaptations to high light in lichens

Published online by Cambridge University Press:  08 January 2013

Jan VONDRÁK  and
Jiří KUBÁSEK
Jan VONDRÁK
Affiliation:
Institute of Botany, Academy of Sciences, Zámek 1, Průhonice, CZ-25243, Czech Republic and Faculty of Science, University of South Bohemia, Branišovská 31, CZ-370 05, České Budějovice, Czech Republic. Email: j.vondrak@seznam.cz
Jiří KUBÁSEK
Affiliation:
Division of Impact Studies and Physiological Analyses, Global Change Research Centre ASCR, Bělidla 4a, Brno CZ-603 00 and Department of Plant Physiology, Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, CZ-370 05
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Abstract

Some lichens that occur in mountains and arid regions have developed an unusual anatomy resembling window-leaved plants. In these lichens, algal cells occur in thick vertical stacks (algal stacks) separated by vertical channels of light-transferring fungal hyphae (fungal stacks). We present experimental evidence that this anatomy permits higher rates of area-based CO2 assimilation in strong light, but that it also leads to higher respiration resulting in higher compensation irradiance. The net effect of this anatomy must be beneficial in regions of high insolation, as it has arisen many times in different parts of the world, and in unrelated lichens, and these lichens often dominate the communities in which they occur.

Keywords

CO2 assimilationconvergent evolutiondark respirationecophysiologylichen symbiosisphotosynthetic light response

Information

Type
Articles
Information
The Lichenologist , Volume 45 , Issue 1 , January 2013 , pp. 115 - 124
Copyright
Copyright © British Lichen Society 2013

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