Plant Regeneration of Rosa chinensis‘Vendela‘ for Scale-up Production via Direct Qrganogenesis Comparison of Cell Growth and Alkaloid Production of Catharanthus roseus Cells Cultured in Shake Flask and in Bioreactor Study on tissue cultivation of adventitious roots of Pseudoxtellariae heterophylla Establishment of adventitious root culture system and scale-up fermentation of Tripterygium wilfordii