Callus Induction, Differentiation and Histological Observation of Narcissus tazetta var. chinensis Floral Organs Investigation on Histological Observation and Protective Enzyme Activities in Ear Rot of Maize (Zea mays L. ) after Fusarium moniliforme Infection Indirect Somatic Embryogenesis and Plant Regeneration of Carya cathayensis Indirect Somatic Embryogenesis and Plant Regeneration of Carya cathayensis Preliminary Report on Somatic Embryogenesis from Stem of Quercus acutissima Carr. and Histological Observation Efficient Somatic Embryogenesis from Leaf Explants of Phalaenopsis in vitro Culture and Histological Observations Efficient Somatic Embryogenesis from Leaf Explants of Phalaenopsis in vitro Culture and Histological Observations