Fig. 1

Phenotype, root biomass, root diameter and secondary metabolites contents in S. miltiorrhiza hairy roots under CK and GA treatment. a Phenotype of hairy roots under CK and GA treatment for 6 days. b Fresh weight of hairy roots under CK and GA treatment for 6 days. c Dry weight of hairy roots under CK and GA treatment for 6 days. d Root diameter of hairy roots under CK and GA treatment for 6 days. e Phenolic acids content of hairy roots under CK and GA treatment for 6 days. f Tanshinones content of hairy roots under CK and GA treatment for 6 days