Dur- ing the six weeks after the starting of the experiment,in the lipoxygenase activity both irradiated and unirradiated callus was at lower level. Six weeks after,lipoxygenase activity increased remark- ably.

• 在试验开始后6周内,无论辐照与否,愈伤组织中脂氧合酶的活性都处于较低的水平,6周后其活性显著增加。