Fig. 4

Differential expression of genes among the root, stem, leaf and flower in the saikosaponin biosynthetic pathway. AACT, acetoacetyl CoA transferase; HMGS, HMG-CoA synthase; HMGR, HMG-CoA reductase; MVK, mevalonate kinase; PMK, phosphomevalonate kinase; MVD, mevalonate diphosphate decarboxylase; DXS, 1-deoxy- D -xylulose-5-phosphate synthase; DXR, 1-deoxy- D -xylulose 5-phosphate reductoisomerase; IDI, isopentenyl-diphosphate delta-isomerase; GPS. geranifolium diphosphate synthetase; FPPS, farnesyl diphosphate synthase; SS, squalene synthase; SE, squalene epoxidase; β-AS, β-amyrin synthase; P450, cytochromes P450; UGT, uridine diphosphate glycosyltransferases