PRELIMINARY STUDY ON CALLUS CULTURE OF ONOSMA PANICULATUM Purple-red Pigment Formed in Callus of Onosma paniculatum Bur.et French CALLUS CULTURE OF ONOSMA PANICULATUM AND SHIKONIN PRODUCTION Fractionation and Biological Activity of Aspergillus oryzae Elicitor Promoting Biosynthesis of Shikonin Derivatives Advances in studies on medicinal Radix Arnebiae Seu Lithospermi