Chromosome Number Variation of Cells in Reiterative Subcultures of Embryonic Callus of Tapiscia sinensis Oliv. Embryonic Callus Induction and Plantlet Regeneration of Tartary Buckwheat EMBRYONIC CALLUS INDUCTION AND PLANT REGENERATION OF Lilium longiflorum Embryonic Callus Induction and Plant Regeneration of Lilium fargesii RELATIONSHIPS BETWEEN INDUCTION RATE OF EMBRYONIC CALLUS AND ENDOGENOUS HORMONES CONTENT IN MAIZE The somatic embryogenesis and its histological characteristics of Zizyphus jujuba Mill. Embryoid Induction and Regeneration in Callus of Kalanchoe blossfeldiana Genetic Transformation of the Phalaenopsis F3′5′H to OT Lily Robina Effect of Ca2+ and Uniconazole Appended in N6-Medium on Immature Embryos Culture in Maize Embryoid Induction and Regeneration in Callus of Kalanchoe blossfeldiana STUDIES ON THE SOMATIC EMBRYOGENESIS OF LIRIODENDRON HYBRIDS(L.CHINENSE×L. TULIPIFERA)