REGULATION OF PHYTOHORMONS ON THE REGENERATION OF SHOOT-TIPS OF ANTIRRHINUM MAJUS INTO PLANTLET IN VITRO

Tissue culture of Antirrhium majus was experimented by using the tip of shoots as the explants, and comparing the effects of NAA, IAA and 2, 4-D on the formation of adventitious buds. The results indicated that the effect of NAA was the best for the formation of adventitious buds, 5.0, 7.0, 9.0, 11.0, 13.0 mg/L BA combinatcd with 0.1, 0.5, 1.0, 1.5, 2.0 mg/L NAA respectively. The results show that combinations of the concentrations of BA 7.0-9.0 mg/L and NAA 0.1-0.5 mg/L were advantageous to the regeneration of buds and NAA was very important for callus growth.

金鱼草AmPIN1a基因过表达载体的构建及转基因分析

本研究以金鱼草的AmPIN1a为目的基因,AmPIN1a基因全长CDS为1 836 bp,通过热激法(电击发)将构建过表达载体pCAMBIA1302 (1301)-AmPIN1a导入根癌农杆菌GV3101中,采用叶盘法转化拟南芥,观察其表型并用外源IAA对其进行处理。结果表明,转化AmPIN1a基因的拟南芥突变体在0~12 d内主根长度略短于野生型主根长度,而且侧根发育明显增多。移栽后,AmPIN1a拟南芥突变体的前期叶片大小也小于野生型,24 d后叶片逐步超过野生型,花序轴萌发晚,但发育较快。过表达AmPIN1a基因的拟南芥在外缘IAA处理下表现出比野生型拟南芥更敏感的性状,由此推测AmPIN1a基因可能在生长素运输过程中起作用。