Document Detail

Validation of the stomatal flux approach for the assessment of ozone visible injury in young forest trees. Results from the TOP (transboundary ozone pollution) experiment at Curno, Italy.
MedLine Citation:
PMID:  19019512     Owner:  NLM     Status:  MEDLINE    
This paper summarises some of the main results of a two-year experiment carried out in an Open-Top Chambers facility in Northern Italy. Seedlings of Populus nigra, Fagus sylvatica, Quercus robur and Fraxinus excelsior have been subjected to different ozone treatments (charcoal-filtered and non-filtered air) and soil moisture regimes (irrigated and non-irrigated plots). Stomatal conductance models were applied and parameterised under South Alpine environmental conditions and stomatal ozone fluxes have been calculated. The flux-based approach provided a better performance than AOT40 in predicting the onset of foliar visible injuries. Critical flux levels, related to visible leaf injury, are proposed for P. nigra and F. sylvatica (ranging between 30 and 33 mmol O(3) m(-2)). Soil water stress delayed visible injury appearance and development by limiting ozone uptake. Data from charcoal-filtered treatments suggest the existence of an hourly flux threshold, below which may occur a complete ozone detoxification.
G Gerosa; R Marzuoli; R Desotgiu; F Bussotti; A Ballarin-Denti
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Validation Studies     Date:  2008-11-18
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  157     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-04-06     Completed Date:  2009-05-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  1497-505     Citation Subset:  IM    
Department of Mathematics & Physics, Catholic University, via dei Musei 41, 25125 Brescia, Italy.
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MeSH Terms
Air Pollutants / analysis,  toxicity*
Ecology / methods
Environmental Exposure
Environmental Monitoring / methods,  standards*
Fagus / growth & development,  metabolism
Fraxinus / growth & development,  metabolism
Models, Biological
Ozone / analysis,  toxicity*
Plant Leaves / drug effects,  metabolism
Plant Stomata / metabolism*
Populus / growth & development,  metabolism
Quercus / growth & development,  metabolism
Trees / growth & development,  metabolism*
Reg. No./Substance:
0/Air Pollutants; 10028-15-6/Ozone

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