To obtain salt-tolerant mutants of Taraxacum mongolicum,using its leaves as explants the callus of salt-tolerant mutant was screened.The results indicated that the optimal medium for callus induction and proliferation was MS + 6-BA 0.5 mg/L + 2,4-D 0.04 mg/L and MS + 6-BA 0.4 mg/L + 2,4-D 0.02 mg/L + NAA 0.2 mg/L respectively.The salt-tolerant mutants were inoculated on medium with different salt concentrations,and screened out from the callus after 4 times of salt stress.Compared with the control without N...