내재휴면기 온도처리가 사과 ‘홍로’ 와 ‘후지’의 발아와 내부물질 변화에 미치는 영향

In this study, we investigated the limit temperature range which is effective for dormancy release of ‘Hongro’ and ‘Fuji’ apples during the endodormancy period. The germination rate was 50% or more in all treatments except of ‘Hongro’ -5℃ treatment. The germination rate of ‘Fuji’ was 86.3% at the temperature of -5℃. The concentrations of carbohydrate and mineral components were significantly different between treatments but did not show any tendency or specific change. However, the sorbitol contents of ‘Hongro’ -5℃ treatment were higher at 29.62 mg/g than those of ‘Fuji’, which was not affected for dormancy release. The results of hormone analysis showed that ABA(abscisic acid) and JA(jasmonic acid) in ‘Hongro’ -5℃ treatment were respectively 176.48 and 15.72 ng/g. ABA, JA and SA(salicylic acid) contents in 'Fuji' apple tree were significantly lower than those of ‘Hongro’. As a result of this study, the limit temperature range effective for dormancy release was different according to the varieties, and ‘Hongro’ did not affect with 30.3% of germination rate at -5℃. However, ‘Fuji’ is 86.3% even at -5℃ it was suggested that ‘Fuji’ had a chilling accumulation for dormancy release.