Document Detail


Ozone exposure and stomatal sluggishness in different plant physiognomic classes.
MedLine Citation:
PMID:  20537773     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Gas exchange responses to static and variable light were tested in three species: snap bean (Phaseolus vulgaris, two cultivars), California black oak (Quercus kelloggii), and blue oak (Q. douglasii). The effects of 1-month (snap beans) and 2-month (oaks) O(3) (ozone) exposure (70ppb over 8h per day in open-top chambers) were investigated. A delay in stomatal responses (i.e., 'sluggish' responses) to variable light was found to be both an effect of O(3) exposure and a reason for increased O(3) sensitivity in snap bean cultivars, as it implied higher O(3) uptake during times of disequilibrium. Sluggishness increased the time to open (thus limiting CO(2) uptake) and close stomata (thus increasing transpirational water loss) after abrupt changes in light level. Similar responses were shown by snap beans and oaks, suggesting that O(3)-induced stomatal sluggishness is a common trait among different plant physiognomic classes.
Authors:
Elena Paoletti; Nancy E Grulke
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  158     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-12     Completed Date:  2010-11-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  2664-71     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Ltd. All rights reserved.
Affiliation:
IPP-CNR, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Florence, Italy. e.paoletti@ipp.cnr.it
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MeSH Terms
Descriptor/Qualifier:
Air Pollutants / toxicity*
Ozone / toxicity*
Phaseolus / drug effects*,  metabolism
Photosynthesis / drug effects
Plant Stomata / drug effects*,  metabolism
Plant Transpiration / drug effects
Quercus / drug effects*,  metabolism
Chemical
Reg. No./Substance:
0/Air Pollutants; 10028-15-6/Ozone

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


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