持续低温胁迫下甜樱桃枝条电导率变化研究

Changes in Cell Electrical Conductivity of Sweet Cherry Branches Under Continuous Low Temperature Stress

用电导法测定了5个甜樱桃和1个酸樱桃的枝条细胞在经历持续低温胁迫的过程中电解质渗出率(即电导率)的变化,研究了5个甜樱桃品种的抗寒性。结果表明:所有樱桃品系的枝条细胞在接受持续-20℃低温胁迫处理过程中,细胞电解质渗出率先升高后降低,即细胞在接受临界致死温度附近的低温胁迫过程中,在一定的较短时间内细胞的自身恢复能力会快速提高。比较各品种之间电解渗出率的相对大小与分析细胞自身恢复能力情况得出,酸樱桃CAB、红艳和龙冠的抗寒力相对较强,是抗寒性较强品系、品种,红蜜、红灯和茉莉抗寒力相对较弱,是抗寒性较弱品种。

Using the methods of electrical conductivity to mensurate the changes in cell electrolyte leakage rate（ie electrical conductivity） of 5 sweet cherries and 1 sour cherry＇s branches after the process of continuous cold stress,the cold resistance of 5 varieties of sweet cherry were studied.The results showed that after the process of-20℃ low temperature continuous cold stress,the cell electrolyte leakage rate of all the cherries＇ branches first increased and then decreased.When the cell undergo the cold stress with the temperature near the critical lethal,the cell＇s self-recovery capability would rapidly improve in a certain of short period of time.Compared the relative values of cell electrolyte leakage rate between species and analyzed the condition of cell self-derived capability,a conclusion was got,sour cherry ‘CAB’,cold resistance of ‘Hongyan’ and ‘Longguan’ was relatively strong,they were varieties with a stronger cold resistance,‘Hongmi’,cold resistance of ‘Hongdeng’ and ‘Moli’ was relatively weak,they were varieties with a weaker cold resistance.