단기 저온처리가 수목휴면지 (樹木休眠枝) 내한성도에 (耐寒性度) 미치는 효과 = Rapid Effect of Low Temperature on the Freezing Resistance of Dehardening Trees

다국어 초록 (Multilingual Abstract)

The present study explored the rapid effect of low temperature on the freezing resistance of dehardening twigs of three apple cultivars and sweet cherry. The effect of low temperature was depending upon the thawing treatment following to the low temperature treatment. When the freezing temperature to -9℃ for three hours followed by thawing treatment (5℃) was given repeatedly twice, the low temperature increased apparently the cold hardiness of apple and cherry by 3 to 9℃. On the other hand, when the freezing temperature (-9℃) for ten hours was pretreated without thawing, the low temperature appeared not affecting the cold resistance of the twigs. The role of freezing-thawing temperature cycle in nature was discussed as a signal of environmental stimulus to which dehardening plant may be responding to increase their cold hardiness so as to adapt against the damage of late frost in early spring.