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Sugar-induced tolerance to the herbicide atrazine in Arabidopsis seedlings involves activation of oxidative and xenobiotic stress responses.
- Source :
-
Plant cell reports [Plant Cell Rep] 2006 May; Vol. 25 (5), pp. 489-98. Date of Electronic Publication: 2006 Jan 06. - Publication Year :
- 2006
-
Abstract
- Exogenous sucrose confers to Arabidopsis seedlings a very high level of tolerance to the herbicide atrazine that cannot be ascribed to photoheterotrophic growth. Important differences of atrazine tolerance between sucrose and glucose treatments showed that activation of chloroplast biogenesis per se could not account for induced tolerance. Sucrose-induced acquisition of defence mechanisms was shown by the gene expression pattern of a chloroplastic iron superoxide dismutase and by enhancement of whole-cell glucose-6-phosphate dehydrogenase activity. Activation of these defence mechanisms depended on both soluble sugar and atrazine. Moreover, acquisition of sucrose protection was shown to unmask atrazine-induced gene expression, such as that of a cytosolic glutathione-S-transferase, which remained otherwise cryptic because of the lethal effects of atrazine in the absence of soluble sugars.
- Subjects :
- Arabidopsis drug effects
Arabidopsis Proteins metabolism
Chloroplasts drug effects
Chloroplasts physiology
Enzyme Activation
Glucose metabolism
Glutathione Transferase metabolism
Seedlings drug effects
Seedlings physiology
Superoxide Dismutase metabolism
Arabidopsis physiology
Atrazine pharmacology
Herbicides pharmacology
Oxidative Stress
Sucrose metabolism
Xenobiotics pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 0721-7714
- Volume :
- 25
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Plant cell reports
- Publication Type :
- Academic Journal
- Accession number :
- 16397785
- Full Text :
- https://doi.org/10.1007/s00299-005-0062-9