Abstract
Rice (Oriza sativa L.) seedlings were subjected tohypoxic pretreatment (H-PT; incubated in 5% O2 atmosphere) forvarious lengths of time followed by a 24-h anoxic stress. Anoxiatolerance of rice coleoptiles was improved with increasing duration of H-PT, butH-PT longer than 6 h gave no additional improvement. ATP andethanol concentrations in the coleoptiles were increased by H-PT, and the timeand pattern of increase in ATP level and ethanol production rate were similar tothose of increase in the anoxia tolerance. These results suggest that the H-PTmay increase anoxia tolerance due to maintenance of anaerobic glycolysis withinduction of ethanolic fermentation to generate ATP, and hypoxic acclimation toanoxic stress in rice coleoptiles may occur within 6 h.
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Kato-Noguchi, H. Time requirement for hypoxic acclimation to anoxia tolerance in rice coleoptiles. Plant Growth Regulation 39, 183–185 (2003). https://doi.org/10.1023/A:1022511915037
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DOI: https://doi.org/10.1023/A:1022511915037