Ethanol Concentration in Tomato Plants during Soil Flooding
1970
Bolton, E. F. | Erickson, A. E.
Tomato plants were studied to assess the potential value of ethanol accumulation in .plant tissue as a measure of O3 stress resulting from short periods of soil flooding. Ethanol concentration in xylem exudate was markedly associated with air temperature, and to a lesser extent with light intensity and soil temperature under conditions of flooding. Field flooding results agreed closely with simulated environments. A small amount of ethanol was eliminated by transpiration from flooded tomato plants under environmental conditions that favored accumulation. A slightly higher amount of ethanol was excreted from the roots. Ethanol in tomato plant samples appeared to indicate the intensity of O₂ deficiency during flooding by reflecting both soil O₂ supply and environmental effects, and could serve as a useful indicator in relating tomato plant injury to flooded conditions.
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