Abstract
Rice seedlings (Oryza sativa L.) were subjected to low temperature pretreatment (LT-PT; 10°C) for various length of time (1, 2, 4, 6, 12, 18, 24 h) followed by a 48-h chilling temperature stress (2°C). Chilling temperature tolerance of rice roots was improved with increasing duration of LT-PT, but LT-PT longer than 12 h gave no additional improvement. Alcohol dehydrogenase activity and ethanol concentration in the roots were increased with increasing duration of LT-PT up to 12 h. Chilling tolerance was also improved by exogenously applied ethanol. These results suggest that LT-PT may increase chilling tolerance in rice roots owing to ethanol accumulation in the roots and LT-PT acclimation to chilling temperature may occur within 12 h.
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Abbreviations
- ADH:
-
Alcohol dehydrogenase
- LP-PT:
-
Low temperature pretreatment
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Kato-Noguchi, H. Low temperature acclimation to chilling tolerance in rice roots. Plant Growth Regul 51, 171–175 (2007). https://doi.org/10.1007/s10725-006-9159-6
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DOI: https://doi.org/10.1007/s10725-006-9159-6