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Ethanolic fermentation and anoxia tolerance in four rice cultivars.
- Source :
-
Journal of plant physiology [J Plant Physiol] 2007 Feb; Vol. 164 (2), pp. 168-73. Date of Electronic Publication: 2006 Feb 17. - Publication Year :
- 2007
-
Abstract
- The relationship between coleoptile elongation and ethanolic fermentation was investigated in rice (Oryza sativa L.) coleoptiles of four cultivars subjected to a 48-h anoxic stress. The coleoptile elongation of all cultivars was suppressed by anoxic stress; however, the elongation of cvs Yukihikari and Nipponbare was much greater than that of cvs Leulikelash and Asahimochi. The stress did not significantly increase lactate dehydrogenase (LDH) activity or lactate concentration, but increased alcohol dehydrogenase (ADH) and pyruvate decarboxylase (PDC) activities, as well as ethanol concentration in the coleoptiles of all cultivars. The elevated ADH and PDC activities and ethanol concentration in cvs Yukihikari and Nipponbare were much greater than those of cvs Leulikelash and Asahimochi, suggesting that ethanolic fermentation is likely more active in cvs Yukihikari and Nipponbare than in cvs Leulikelash and Asahimochi. ATP concentration in cvs Yukihikari and Nipponbare in anoxia was also greater than that in cvs Leulikelash and Asahimochi in anoxia. The ethanol concentration in the coleoptiles was correlated with anoxia tolerance with respect to the ATP concentration and coleoptile elongation. These results suggest that the ability to increase ethanolic fermentation may be one of the determinants in anoxia tolerance of rice coleoptiles.
- Subjects :
- Adaptation, Physiological
Adenosine Triphosphate metabolism
Alcohol Dehydrogenase metabolism
Cotyledon enzymology
Cotyledon physiology
L-Lactate Dehydrogenase metabolism
Oryza enzymology
Oryza physiology
Pyruvate Decarboxylase metabolism
Cotyledon metabolism
Ethanol metabolism
Fermentation physiology
Oryza metabolism
Oxygen physiology
Subjects
Details
- Language :
- English
- ISSN :
- 0176-1617
- Volume :
- 164
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Journal of plant physiology
- Publication Type :
- Academic Journal
- Accession number :
- 16483690
- Full Text :
- https://doi.org/10.1016/j.jplph.2005.09.017