果树学报2008，Vol.25Issue(4)：485-490,6.
短时间冰冻低温处理下活性氧代谢与桃芽自然休眠解除研究
A study on active oxygen metabolism and endodormancy release in nectarine bud treated by short-term freezing
摘要
Abstract
Bud livability, budburst, active oxygen production and activities of related enzymes in Shuguang nectarine (Prunus persica var. Nectarina Maxim. Cv. Shuguang) shoots exposed to seven short-term freezing temperatures at three expo- sure durations were studied in order to understand the mechanism of endodormancy release by short-term freezing. The re- sults showed that the effects of short-term freezing on endodormancy varied with the date of treatment, temperatures and ex-posure time. Among the three different dates, treatments at -4℃ and -7℃ had no significant effect on budbreak, and O2·- and · OH production rates, concentration of H2O2 and the activities of CAT, SOD and POD enzymes at -4 ℃ and -7℃had no significant difference from the control. Freezing temperatures at -10 ℃ or lower significantly increased budbreak, O2·- and·OH production rates, concentration of H2O2 and the activities of CAT and POD enzymes but reduced SOD activity. Later short-term freezing treatments produced better dormancy-releasing effects. The correlation between budburst and reactive oxygen species among different treatments indicated that a significant accumulation of reactive oxygen species was probably important for endodormancy release.关键词
油桃/冰冻低温/自然休眠/活性氧代谢/芽Key words
Nectarine/Short-term freezing/Endodormancy/Active oxygen metabolism/Bud分类
农业科技引用本文复制引用
赵海亮,赵文东,高东升..短时间冰冻低温处理下活性氧代谢与桃芽自然休眠解除研究[J].果树学报,2008,25(4):485-490,6.基金项目
国家"863计划"项目(2001AA247041) （2001AA247041）
