Influence of inorganic salt concentration on etiolation in potato shoot tip culture.

Experiments with different levels of NH4NO3,MgSO4.7H2O,CaCl2.2H2O and the iron salt in inducing medium were conducted by using cv.B01-31-9 in order to solve the problem of bud etiolation in potato shoot tip culture.Results showed that the concentration change of N,Mg and Fe had significant effects on etiolation inhibition,and the rate of etiolation was the lowest when the concentration of NH4NO3,MgSO4.7H2O and iron salt was 1 600 mg·L-1,400 mg·L-1,83.4 mg·L-1,respectively.However,there were no significant differences in generation index for all factors in etiolation experiments.