Journal
ENVIRONMENTAL POLLUTION
Volume 152, Issue 3, Pages 731-735Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2007.06.046
Keywords
air pollution; chlorophyll fluorescence; fumarprotocetraric acid; lichen substances; sulphur dioxide
Categories
Ask authors/readers for more resources
The effective quantum yield of photochemical energy conversion in photosystem II (Phi(2)) was shown to be reduced in the terricolous lichens Cetraria aculeata and Cetraria islandica by short-term exposure to aqueous SO2 at pH values occurring in the precipitation of areas with high SO2 pollution. Significant reduction of Phi(2) was found at pH <= 3.3. At pH 2.8, Phi(2) was close to zero and did not recover within 24 h. This suggests that sensitivity to SO2 (primarily associated with epiphytic lichens in the past) has contributed to the decline of both species in central Europe. In C. islandica, but not in C. aculeata, thalli with the natural content of lichen substances were more tolerant to SO2 than thalli where the extracellular lichen substances were extracted before the experiment. This supports published results that the depsidone fumarprotocetraric acid, a major lichen substance of C. islandica, increases the pollution tolerance in lichens. (c) 2007 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available