【摘要】 以结球甘蓝早熟品种8398和中熟品种京丰1号为试材,分别在植株长至7片和9片真叶时进行绿体春化处理18和21d,再进行37℃高温春化逆转12h,研究结球甘蓝高温春化逆转过程中内源激素含量的变化。结果表明:在高温春化逆转过程中,结球甘蓝植株体内GA3含量变化不大,IAA含量呈上升趋势,ABA含量呈下降趋势。与低温春化的对照相比,在高温春化逆转结束时,GA3和ABA含量显著降低,而IAA含量显著升高。低水平的GA3和ABA含量和高水平的IAA含量有利于春化逆转完成。更多还原

【Abstract】 ‘8398’cabbage(Brassica oleracea var. captata L.)plants with 7 true leaves and ‘Jingfeng No.1’cabbage plants with 9 true leaves were vernalized in incubator. Then,‘8398’cabbage plants vernalized for 18 days and‘Jingfeng No.1’cabbage plants vernalized for 21 days were treated by high temperature of 37 ℃ for 12 hours to explore the changes of endogenous hormone during devernalization in cabbage. The results showed that: GA3 content had less changes, IAA content rose and ABA content decreased during devernalization. Compared with CK(vernalization period), GA3 and ABA content decreased significantly, whereas IAA content rose significantly when devernalization ended. Lower GA3 and ABA content, and higher IAA content can benefit the accomplishment of devernalization.更多还原