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Fermentation Rates and Ethanol Accumulation in Relation to Flooding Tolerance in Rhizomes of Monocotyledonous Species

MONK, L. S. ; CRAWFORD, R. M. M. ; BRÄNDLE, R.

In: Journal of Experimental Botany, 1984, vol. 35, no. 5, p. 738-745

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    Titre
    • Fermentation Rates and Ethanol Accumulation in Relation to Flooding Tolerance in Rhizomes of Monocotyledonous Species
    Auteur
    • MONK, L. S.. Department of Botany, The University St Andrews, Scotland, U.K
    • CRAWFORD, R. M. M.. Department of Botany, The University St Andrews, Scotland, U.K
    • BRÄNDLE, R.. Institute of Plant Physiology, University of Berne Switzerland
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Journal of Experimental Botany, 1984, vol. 35, no. 5, p. 738-745. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:294378
    Summary
    Under anoxia an accumulation of ethanol took place in all species. Lactic fermentation was found to be of less importance in every case. The amount of ethanol accumulated depended on the ability of the rhizome to eliminate it from its tissues. Despite great variations in fermentative capacity as seen in the ADH measurements the wetland species did not accumulate ethanol to concentrations greater than 30 μmol g−1 fresh weight. This represented a plateau above which the ethanol concentration did not rise even with continued anaerobic incubation. No such plateau of ethanol accumulation was found in the dryland species Iris germanica which accumulated ethanol steadily reaching concentrations of 70 μmol g−1 fresh weight. If ethanol is toxic to higher plant tissues then the steady state condition of low ethanol accumulation found in wetland species will minimize this danger