Loading...
Thumbnail Image
Item

Carbon dioxide exchange in lichens: Relationship between the diffusive resistance of carbon dioxide and water vapour

Abstract
Gaseous diffusion resistances for carbon dioxide and water vapour, thallus water content and thallus water potential were experimentally determined on species of the Stictaceae. The diffusion resistance to water loss was high only at low water contents and correlated closely with thallus water potential. Carbon dioxide diffusion resistances, however, were high at both low and high water contents and, even at medium water contents, were still an order of magnitude greater than the water resistance. These results indicate that carbon dioxide and water vapour exchange occur by different pathways in these lichens. Consequently it is suggested that the lichens have structural adaptations which separate the functions of water uptake, water storage and carbon dioxide exchange.
Type
Journal Article
Type of thesis
Series
Citation
Green, T. G. A., & Snelgar, W. P. (1982). Carbon dioxide exchange in lichens: Relationship between the diffusive resistance of carbon dioxide and water vapour. The Lichenologist, 14(03), 255-260.
Date
1982
Publisher
Degree
Supervisors
Rights
This article is published in the journal, The Lichenologist. Copyright © British Lichen Society 1982.