Effect of Plant Growth Retardant B9 on Growth of Test-tube Plantlets of Potato

The effects of B9 on their growth indexes of Favorite,such as plant height,leaf number,number of useable stems and the survival rate were studied to improve the quality of test-tube plantlets during the storage time. The results showed that B9 could inhibit the growth of the test-tube plantlets;When the concentration of B9 was 40 mg/L,The storage period of the test-tube plantlets could be extended obviously and the survival rate was up to 90 %(CK 0 %) after cultured for 234 days while the multiplication culture was not affected.Moreover,the subculture times and the pollution rate of the test-tube plantlets could be reduced and the labor power and the material resources could be saved.