赤霉素及脱落酸诱导芥菜抽薹的效果

Effect of Mustard Bolting Induced with Gibberellin and Abscisic Acid

将紫丰1号和重庆儿菜种子先于4℃春化处理20d,待两片真叶完全展开后,再对其生长点喷施不同浓度(300、400、500、600mg·L-1)的赤霉素(GA3),每隔3d喷施1次,直至抽薹现蕾。结果表明,促进芥菜抽薹的GA3最佳浓度为500mg·L-1。若在喷施GA3前一天喷施50mg·L-1脱落酸(ABA),则可加强芥菜植株对赤霉素的敏感性,使促进抽薹的赤霉素最佳浓度降低到400mg·L-1,其中紫丰1号对赤霉素的敏感性不及重庆儿菜明显。

The seeds of‘ Chongqingercai＇ and ‘ Zifeng No. 1 ＇ were treated for 20 days at 4 ℃ to complete their vernalization process, then different concentrations of gibberellin（300,400,500 and 600 mg · L^-1 ）were sprayed on their apical meristem after the two pairs of euphylla were fully expanded in every four days until they were bolting. The results showed that the best concentration was 500 mg · L^-1 GA3. If using abscisic acid of 50 mg ~ L- 1 one day before treating with giberellin,the sensitivity of mustard plants to giberellin were enhanced and the best concentration of promoting the bolting of mustard was reduced to 400 mg · L^-1, but it was more significant in‘ Chongqingercai＇ than in＇ Zifeng No. 1 while using abscisic acid to enhance the sensitivity of plant to gibberellin.