Fig. 1From: Influence of gamma radiation and phenylalanine on secondary metabolites in callus cultures of milk thistle (Silybum marianum L.)Seed germination of S. marianum L. on half-strength Murashige and Skoog (MS) medium (A), calli formation from stem segments on MS medium supplemented with 1 mg/l 2,4-D and 0.5 mg/l BA (B), and calli from stem explants derived from seeds exposed to 25 Gy (C) or 50 Gy (D)Back to article page