Effects of low temperature stress on secondary metabolites of Arnebia euchroma suspension cells Influence of Culture Conditions on Arnebia euchroma Hairy Roots Growth and Shikonin Content Determination of shikonin in Arnebia euchroma by molecular imprinting-flow injection chemiluminescence method Optimization on homogenate extraction technology of naphthoquinones from Arnebia euchroma by response surface methodology Establishment of asexual multiplication system of Arnebia euchroma Determination of shikonin in Arnebia euchroma by molecular imprinting-flow injection chemiluminescence method