Document Detail

Defense and avoidance of ozone under global change.
MedLine Citation:
PMID:  17055629     Owner:  NLM     Status:  MEDLINE    
The level II approach of the critical loads concept adopted by the UNECE aims at a flux based evaluation and takes into account environmental factors governing stomatal conductance. These factors will probably be affected by global change. The flux concept predicts that a decrease in stomatal conductance would protect trees from air pollution effects by decreasing uptake. However, experimental evidence is inconclusive. Numerous results suggest that pollutants and factors subject to global change (drought, CO(2)) may interact and even exacerbate effects, probably because antioxidative defense systems are involved in both, defense against pollutant effects and protection from natural stress. An effective pollutant dose, which is weighted by physiological defense capacity, would better predict such effects. In this review paper we argue that the flux-based approach is imperfect, because global change effects may also modify the physiological susceptibility to ozone. Instead, a flux concept weighted by defense capacity should be tested.
Michael Tausz; Nancy E Grulke; Gerhard Wieser
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2006-10-19
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  147     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-05-14     Completed Date:  2007-07-23     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  525-31     Citation Subset:  IM    
School of Forest and Ecosystem Science, University of Melbourne, Water Street, Creswick, Vic, Australia.
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MeSH Terms
Antioxidants / metabolism
Carbon Dioxide / analysis
Environmental Exposure / adverse effects
Models, Biological
Oxidants, Photochemical / toxicity*
Ozone / toxicity*
Plant Physiological Phenomena / drug effects*
Plants / drug effects*
Reactive Oxygen Species / metabolism
Reg. No./Substance:
0/Antioxidants; 0/Oxidants, Photochemical; 0/Reactive Oxygen Species; 10028-15-6/Ozone; 124-38-9/Carbon Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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