【摘要】 [目的]选择合适小麦根芽生长的萘乙酸(NAA)浓度,为农业生产提供服务。[方法]以浓度10、1、0.1、0.01、0.001、0.000 1、0.000 01 mg/L的NAA溶液培养小麦,以清水培养(0 mg/L)为对照,培养4d后测定小麦芽、根长度和叶绿素含量、根系活力。[结果]NAA对小麦根芽的生长表现出低浓度促进,高浓度抑制效应;根对NAA较为敏感,NAA浓度在0~0.000 01 mg/L对根的生长有明显的促进作用,在0.000 01 mg/L处理时效果最为明显,根平均长度4.83 cm;芽对NAA相对不敏感,浓度0~0.1 mg/LNAA处理的芽长均高于对照芽长,其中以浓度0.000 1 mg/LNAA处理时效果最为明显;浓度0.000 1~0.001 mg/LNAA处理的叶绿素含量均高于不加NAA的含量,0.000 1 mg/LNAA处理的叶绿素含量最高;浓度0~0.000 1 mg/LNAA处理的根系活力明显增强,其中以0.000 01 mg/L处理的根系活力最强。[结论]合适浓度的NAA对小麦根芽生长具有不同程度的促进作用,小麦根对NAA较芽敏感。更多还原

【Abstract】 [Objective] The suitable naphthylacetate(NAA) concentration for wheat shoot growth was chosen for serving agricultural production.[Method] The wheat was cultured with the NAA concentration of 10,1,0.1,0.01,0.001,0.000 1,0.000 01 and 0 mg/L and the length of shoot and root,the content of chlorophyll and root activity were determined.[Results] The result showed the application of low concentration of NAA promoted wheat root and shoot growth,high concentration,inhibited it.The root system was more sensitive to NAA;The NAA concentration in the range from 0 to 0.000 01 mg/L had obvious promotion on root growth and the NAA concentration with the best effect was 0.000 01 mg/L with average length of root,4.83cm.The bud was not relatively sensitive to NAA.The lengths of shoot in treatments with the NAA concentration of 0-0.1mg/L were higher than that of the control.The NAA concentration of 0.000 1 mg/L was with the most obvious effect;the content of chlorophyll was higher in NAA concentration of 0.000 1-0.001 mg/L than control;the highest content of chlorophyll was from the treatment of 0.000 1 NAA mg/L.The activity of root was markedly enhanced in treatment of NAA concentration of 0-0.000 1mg/L;the most one,from the treatment of 0.000 01 mg/L.[Conclusion] The appropriate concentrations of NAA could promote the wheat root and shoot growth and wheat root was more sensitive to NAA than shoot.更多还原