| Susceptibility to acidic precipitation contributes to the decline of the terricolous lichens Cetraria aculeata and Cetraria islandica in central Europe. | |
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MedLine Citation:
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PMID: 18053625 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effective quantum yield of photochemical energy conversion in photosystem II (Phi2) 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 Phi2 was found at pH<or=3.3. At pH 2.8, Phi2 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. |
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Authors:
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Markus Hauck |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-11-28 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 152 ISSN: 0269-7491 ISO Abbreviation: Environ. Pollut. Publication Date: 2008 Apr |
Date Detail:
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Created Date: 2008-04-02 Completed Date: 2008-09-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 731-5 Citation Subset: IM |
Affiliation:
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Albrecht von Haller Institute of Plant Sciences, Department of Plant Ecology, University of Göttingen, Untere Karspüle 2, D-37073 Göttingen, Germany. mhauck@gwdg.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid Rain
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adverse effects* Acute Toxicity Tests / methods Ecology / methods Environmental Pollution / adverse effects* Europe Hydrogen-Ion Concentration Lichens* Sulfur Dioxide / toxicity |
| Chemical | |
Reg. No./Substance:
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0/Acid Rain; 7446-09-5/Sulfur Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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