Document Detail

Defining hybrid poplar (Populus deltoides x Populus trichocarpa) tolerance to ozone: identifying key parameters.
MedLine Citation:
PMID:  19076530     Owner:  NLM     Status:  MEDLINE    
This study examined whether two genotypes of hybrid poplar (Populus deltoides x Populus trichocarpa), previously classified as ozone tolerant and ozone sensitive, had differing physiological and biochemical responses when fumigated with 120 nL L(-1) ozone for 6 h per day for eight consecutive days. Isoprene emission rate, ozone uptake and a number of physiological and biochemical parameters were investigated before, during and after fumigation with ozone. Previous studies have shown that isoprene protects plants against oxidative stress. Therefore, it was hypothesized that these two genotypes would differ in either their basal isoprene emission rates or in the response of isoprene to fumigation by ozone. Our results showed that the basal emission rates of isoprene, physiological responses and ozone uptake rates were all similar. However, significant differences were found in visible damage, carotenoids, hydrogen peroxide (H(2)O(2)), thiobarbituric acid reactions (TBARS) and post-fumigation isoprene emission rates. It is shown that, although the classification of ozone tolerance or sensitivity had been previously clearly and carefully defined using one particular set of parameters, assessment of other key variables does not necessarily lead to the same conclusions. Thus, it may be necessary to reconsider the way in which plants are classified as ozone tolerant or sensitive.
A Ryan; C Cojocariu; M Possell; W J Davies; C N Hewitt
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Plant, cell & environment     Volume:  32     ISSN:  1365-3040     ISO Abbreviation:  Plant Cell Environ.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2008-12-16     Completed Date:  2008-12-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9309004     Medline TA:  Plant Cell Environ     Country:  United States    
Other Details:
Languages:  eng     Pagination:  31-45     Citation Subset:  IM    
Lancaster Environment Centre, Lancaster University, Lancaster, UK.
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MeSH Terms
Ascorbic Acid / metabolism
Butadienes / metabolism*
Carotenoids / metabolism
Chlorophyll / metabolism
Hemiterpenes / metabolism*
Hydrogen Peroxide / metabolism
Lipid Peroxidation
Oxidative Stress*
Ozone / pharmacology*
Pentanes / metabolism*
Plant Leaves / drug effects,  genetics,  metabolism
Populus / drug effects,  genetics,  metabolism*
Thiobarbiturates / metabolism
Grant Support
BBS/B/12172//Biotechnology and Biological Sciences Research Council
Reg. No./Substance:
0/Butadienes; 0/Hemiterpenes; 0/Pentanes; 0/Thiobarbiturates; 10028-15-6/Ozone; 1406-65-1/Chlorophyll; 36-88-4/Carotenoids; 479-61-8/chlorophyll a; 50-81-7/Ascorbic Acid; 504-17-6/thiobarbituric acid; 7722-84-1/Hydrogen Peroxide; 78-79-5/isoprene

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

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