Document Detail

Effects of ethylenediurea and ozone on the antioxidative systems in beans (Phaseolus vulgaris L.).
MedLine Citation:
PMID:  15091506     Owner:  NLM     Status:  PubMed-not-MEDLINE    
To study the biochemical mechanism of EDU protection against ozone injury, peroxidase, ascorbate-dependent peroxidase, and catalase activities, and the contents of ascorbic acid, dehydroascorbic acid, malondialdehyde and soluble protein were measured in Phaseolus vulgaris L. cv. Lit exposed to ozone and ethylenediurea (EDU) in open-top chambers. Plants not treated with EDU showed foliar bronzing due to ozone, while EDU-treated plants were not affected. EDU application modified the reaction of biochemical parameters to ozone. Soluble protein content was elevated by EDU. Peroxidase activity increased with ozone exposure in untreated plants only, while ascorbate-dependent peroxidase activity was lower in EDU treated plants. Catalase activity decreased in EDU-untreated plants. The ratio of ascorbic acid to dehydroascorbic acid was significantly increased in EDU treated plants. These results suggest that EDU might induce ascorbic acid synthesis and therefore provide the plant with a very potent antioxidant. Or the content of hydrogen peroxide was reduced due to other unknown processes and caused a delay in foliar senescence, regardless of whether these processes were ozone-induced or due to natural aging processes.
S Brunschön-Harti; A Fangmeier; H J Jäger
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  90     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  1995  
Date Detail:
Created Date:  2004-04-19     Completed Date:  2005-01-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  95-103     Citation Subset:  -    
Institute for Plant Ecology, University of Giessen, Heinrich-Buff-Ring 38, D-35392 Giessen, Germany.
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