仁用杏树多酚氧化酶活性年变化规律的研究

Studies on the Yearly Changing Tendency of the Activity of PPO in Kernel-apricot

对华北地区主要经济树种仁用杏各器官在不同生育期间四种不同处理下的多酚氧化酶(PPO)活性进行测定,结果表明:1仁用杏树体各器官内的多酚氧化酶活性在整个年循环周期内呈规律性变化。其中,叶中PPO活性整体水平在10月份最高;枝、干、主根、侧根中的PPO活性均以5月和3月极显著地高于7月和10月。2PPO活性与仁用杏树体的抗寒性、地上部分的生长发育有关,并可作为仁用杏树抗寒性的生化指标。3铜、锌两种营养元素通过影响PPO活性来影响仁用杏树生长。

The activity of polyphenoloxidase (PPO) of 5 various organs in 4 different growth phase of Kernel-apricot was analysed,the results show that,(1)the PPO activity of various organs has a orderly change,the activity of PPO of leaves reach the maximum in October;the activity of PPO of branch,truck,main root,lateral root is higher in May and March than in July and October conspicuously.(2)the activity of PPO is related to cold resistance and growth of the part above the earth surface of kernel-apricot,and it can be used as biochemical index of adverse circumstances resistance of kernel-apricot.(3)Cu and Zn,as nutrient elements have effects on the activity of PPO,so as to affect the growth of kernel-apricot.