Somatic Embryogenesis and Rhizogenesis of Tissue Cultures of Two Genotypes of Papaver somniferum: Relationships to Alkaloids Production - Laurain-Mattar, Dominique; Gillet-Manceau, Françoise; Buchon, Laurent; Nabha, Sanaa; Fliniaux, Marc-André; Jacquin-Bubreuil, Annie (Planta Medica, 1999)