以黄连木1年生休眠枝条为试材，研究了冷冻处理条件下枝条内细胞超氧化物歧化酶(SOD)和过氧化物酶(POD)活性，丙二醛(MDA)、可溶性蛋白、可溶性糖含量以及枝条相对电导率的变化。结果表明:随着处理温度降低，1年、2年生黄连木枝条内SOD和POD酶活性均呈现先升高后下降的趋势；MDA、可溶性蛋白和可溶性糖含量随温度降低逐渐升高；相对电导率随处理温度降低呈“S”形上升。1年、2年生黄连木枝条的低温半致死温度(LT50)分别为-24.88℃、-26.58℃。

Take one-year-old sticks as materials, the activities of superoxide dismutase (SOD) and peroxidase (POD), the content of Malondialdehyde (MDA), the content of soluble protein and the content of soluble sugar, the relative electrolyte leakage percentage of one-year and two-year Pistacia chinensis seedlings in different low temperature conditions were studied in the paper. It showed that the activities of SOD and POD in embrace increased early and decreased later, the content of MDA、soluble protein and soluble sugar increased with the temperature decreasing. The relative electric conductivity increased as a S-curves with the temperature decreasing. According to the Logistic equation, the semi-lethal temperature (LT50) for sticks of one-year and two-years Pistacia chinensis seedlings were -24.88℃ and -26.58℃, respectively.