| Photosynthesis, chloroplast pigments, and antioxidants in Pinus canariensis under free-air ozone fumigation. | |
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MedLine Citation:
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PMID: 19000645 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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High O3 levels, driving uptake and challenging defense, prevail on the Canary Islands, being associated with the hot and dry summers of the Mediterranean-type climate. Pinus canariensis is an endemic conifer species that forms forests across these islands. We investigated the effects of ozone on photosynthesis and biochemical parameters of P. canariensis seedlings exposed to free-air O3 fumigation at Kranzberg Forest, Germany, where ambient O3 levels were similar to those at forest sites in the Canary Islands. The twice-ambient O3 regime (2 x O3) neither caused visible injury-like chlorotic or necrotic spots in the needles nor significantly affected violaxanthin, antheraxanthin and zeaxanthin levels and the de-epoxidation state of the xanthophyll cycle. In parallel, stomatal conductance for water vapour, net photosynthesis, intercellular CO2 concentration, chlorophyll fluorescence parameters, as well as antioxidant levels were hardly affected. It is concluded that presently prevailing O3 levels do not impose severe stress on P. canariensis seedlings. |
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Authors:
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Ch Then; K Herbinger; V C Luis; C Heerdt; R Matyssek; G Wieser |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-11-09 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 157 ISSN: 1873-6424 ISO Abbreviation: Environ. Pollut. Publication Date: 2009 Feb |
Date Detail:
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Created Date: 2008-12-08 Completed Date: 2009-04-17 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: 392-5 Citation Subset: IM |
Affiliation:
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Federal Research and Training Centre for Forests, Natural Hazards and Landscape, Unit of Alpine Timberline Ecophysiology, Rennweg 1, A-6020 Innsbruck, Austria. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Antioxidants
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metabolism* Chlorophyll / metabolism* Chloroplasts / drug effects, metabolism Fumigation Oxidative Stress Ozone / pharmacology* Photosynthesis / drug effects* Pinus / drug effects*, metabolism Seedling / drug effects, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Antioxidants; 10028-15-6/Ozone; 1406-65-1/Chlorophyll |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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