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Comparative Studies on Xanthoria Parietina, a Pollution Resistant Lichen, and Ramalina Duriaei, a Sensitive Species. I. Effects of Air Pollution on Physiological Processes

Published online by Cambridge University Press:  28 March 2007

L. Silberstein
Affiliation:
Department of Botany, George S. Wise Faculty of Life Science, Tel-Aviv University, Tel-Aviv 69978, Israel
B. Z. Siegel
Affiliation:
School of Public Health, University of Hawaii at Manoa, Honolulu, Hawaii, U.S.A.
S. M. Siegel
Affiliation:
Department of Botany, University of Hawaii at Manoa, Honolulu, Hawaii, U.S.A.
A. Mukhtar
Affiliation:
Department of Botany, George S. Wise Faculty of Life Science, Tel-Aviv University, Tel-Aviv 69978, Israel
M. Galun*
Affiliation:
Department of Botany, George S. Wise Faculty of Life Science, Tel-Aviv University, Tel-Aviv 69978, Israel
*
Corresponding author

Abstract

Xanthona parietina thalli were collected from a ‘clean-air’ location and from a polluted area. Ramalina duriaei thalli were collected from the same ‘clean-air’ location and some thalli were transplanted to air polluted locations, where R. duriaei no longer occurs. The effects of air contaminants on these two lichens were compared under controlled laboratory conditions and in field experiments. Air contaminants and exposure to bisulphite ions had little or no damaging effect on X. parietina, whereas severe damage was caused to R. duriaei, as judged by chlorophyll degradation, autofluorescence of photobionts, photosynthetic activity, membrane integrity and ATP content. The different responses presented confirm the sensitivity of R. duriaei and resistance of X. parietina to air pollution.

Type
Research Article
Copyright
Copyright © British Lichen Society 1996

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Footnotes

Deceased.