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[目的]为选育和鉴定杏的抗寒品种提供理论依据。[方法]观察6个抗寒性不同的杏品种休眠期叶芽的SOD、POD酶活性变化,研究酶变化与抗寒性的关系。[结果]抗寒性强的串枝红SOD酶活性1月份比12月份增加了1.89倍,抗寒性较强的兰州杏和鸡蛋杏分别增加了1.73和1.61倍,抗寒性较弱的意大利2号的增加量最少。各品种1月份的POD酶活性普遍增长,但上升幅度各不相同,增长最明显的是串枝红和兰州杏,分别由12月份的958、3 U/[g.(FW)]增加到1月份的1911、46 U/[g.(FW)],2月份又有所下降。[结论]不同杏品种之间存在抗寒性差别,串枝红和兰州杏的SOD、POD酶活性保持较好,抗寒性较强,可利用品种的抗寒资源进行育种。
[Objective] The research aimed to provide a theoretical basis for breeding and identifying cold-resistant apricot varieties. [Method] The changes of SOD and POD activities of dormancy buds of six apricot cultivars with different cold resistance were observed. The relationship between enzyme changes and cold resistance was studied. [Result] The results showed that the activity of SOD of Chuanxian red with strong cold resistance increased by 1.89 times in January compared with that in December, and Lanzhou apricot and egg apricot with strong cold resistance increased by 1.73 and 1.61 times, respectively, while cold hardiness was weaker in Italy No. 2 increase the least. The POD activity of all cultivars increased generally in January, but the increase ranged from 1% to 95%. The most obvious increase was the twig red and Lanzhou apricot, which increased from 958,3 U / [g · (FW)] in December to 1 1911,46 U / [g. (FW)] for the month declined again in February. [Conclusion] There was a difference in cold resistance among different apricot cultivars. The activities of SOD and POD of S. chinensis and L. sylvestris were well maintained and their cold resistance was strong.