Document Detail


Quantification of mesophyll resistance and apoplastic ascorbic acid as an antioxidant for tropospheric ozone in durum wheat (Triticum durum Desf. cv. Camacho).
MedLine Citation:
PMID:  19082416     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The daily variations in cellular and apoplastic ascorbic acid and dehydroascorbic acid levels in a Mediterranean durum wheat cultivar (Triticum durum Desf. cv. Camacho) were analyzed in order to relate them to ambient ozone exposure and to subsequent stomatally absorbed ozone fluxes. The aim of this study is to prove the effectiveness and accuracy of a computer model (SODA) to calculate the mesophyll resistance (rm) to ozone uptake, the percentage of ozone detoxification by apoplastic ascorbic acid, and the ozone flux to the plasmalemma (Fm) in a Mediterranean durum wheat cultivar. These calculated factors were related to apoplastic ascorbic acid levels and to ambient ozone concentrations. These relationships were obtained with a view to explaining the detoxification of ozone by apoplastic ascorbic acid. Ozone detoxifications of up to 52% were found at midday, when maximum ozone concentrations and maximum apoplastic ascorbic acid are seen. Mesophyll resistance was minimum at this time, and ozone flux to the plasmalemma was reduced because of the reaction of ozone with apoplastic ascorbic acid.
Authors:
Daniel de la Torre
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Publication Detail:
Type:  Journal Article     Date:  2008-12-14
Journal Detail:
Title:  TheScientificWorldJournal     Volume:  8     ISSN:  1537-744X     ISO Abbreviation:  ScientificWorldJournal     Publication Date:  2008  
Date Detail:
Created Date:  2008-12-16     Completed Date:  2009-01-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101131163     Medline TA:  ScientificWorldJournal     Country:  England    
Other Details:
Languages:  eng     Pagination:  1197-209     Citation Subset:  IM    
Affiliation:
Universidad Politécnica de Madrid, Plant Biology Department, ETSI Agrónomos, 28040 Madrid. daniel.delatorre@upm.es
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MeSH Terms
Descriptor/Qualifier:
Antioxidants / pharmacology*
Ascorbic Acid / pharmacology*
Drug Resistance / drug effects*
Ozone / chemistry*
Triticum / chemistry*
Chemical
Reg. No./Substance:
0/Antioxidants; 10028-15-6/Ozone; 50-81-7/Ascorbic Acid

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


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