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    
Abstract/OtherAbstract:
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.
Authors:
S Brunschön-Harti; A Fangmeier; H J Jäger
Related Documents :
32196 - Appraisal of ascorbic acid for acidifying the urine of methenamine-treated geriatric pa...
3768406 - The antioxidant efficiency of vitamin c is concentration-dependent.
11207686 - Topical l-ascorbic acid: percutaneous absorption studies.
19732276 - The analysis of black powder substitutes containing ascorbic acid by ion chromatography...
2778876 - Fatty acid acylation of vaccinia virus proteins.
8206886 - A study on the metabolism of spermidine in mammals: purification and identification of ...
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:  -    
Affiliation:
Institute for Plant Ecology, University of Giessen, Heinrich-Buff-Ring 38, D-35392 Giessen, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Influence of ozone and ethylenediurea (EDU) on growth and yield of bean (Phaseolus vulgaris L.) in o...
Next Document:  Toxicity of crude oil to the mayfly, Hexagenia bilineata (Ephemeroptera: Ephemeridae).