Callus Formation from Protoplasts and Plant Regeneration from Tissue Culture of Silybum marianum Gaertn Bioactive lignans from Silybum marianum Effects of exogenous nitric oxide on physiology of seed germination and seedling growth of Silybum marianum under NaCl stress Physiological and Biochemical Responses of Silybum marianum to Salt Stress at Germinating and Seedling Stages Establishment of culture system of Silybum marianum hairy roots and determination of silybin Establishment of Silybum marianum cell suspension culture system and effectsof different factors on silybin content Study of quality testing method for seeds of Silybum marianum