Study of Regulation Technique of Rice Plantlet in vitro with Multi-Effect Triazole

The results indicated that: (1) Multi-Effect Triazole (MET) inhibitcd the callus induction from immature embryo. However, the callus redifferentiation and green plantlet formation were promoted significantly, especially with lower concentration of MET (2.5mg/l); (2) MET inhibited the plant height obviously and promoted the development of the root system of plantlet, such effect usually maintained for about 2 months But the effect of MET on leafage was not significant; (3) The survival rate of MET hardened plantlets was about 95% and the plantlcts grew more vigorously after transplanting; (4) compared with the control, the MET treated plantlets contained bigger vascular, thicker mesophyll cells, denser surface cells and more inclusion in the vascular cells.