Relations between changes of protease in cabbage with the devernalization.

In order to solve the problem of cabbage early-bolting under low temperature,the relations between changes of protease in cabbage with the devernalization was investigated.Temperature at 37℃ was used for devernalization as a treatment,whereas low temperature vernalization of plants as a control.The content of soluble protein and the activity of NR,POD,CAT reduced by 13.1 and 6.6mg/g,26.5 and 45.9μg/(g·h),19.8 and 17.1μg/(g·min),11.6 and 9.6U/(g·min) for the early maturing variety of cabbage '8398',and for the mid-variety of Cabbage 'Jingfeng'.The study found that the decline of the content of soluble protein,and the activity of POD,CAT in '8398' was higher than that in 'Jingfeng';but the activity of NR in 'Jing feng' was higher than that in '8398',the results showed that soluble protein contents,POD,CAT and NR activity at lower levels was benefit to devernalization.