Transformation of Maize Immature Embryos with Trehalose Synthase Gene THE COMPARISON OF THE DYNAMIC CHANGES OF ENDOGENOUS HORMONES IN CALLUS BETWEEN MATURE AND IMMATURE EMBRYOS OF MAIZE Study on Influencing Factors of Mature Embryos of Wheat by Particle Bombardment Somatic Embryogenesis and Plant Regeneration from Mature Embryo Explants in Quercus acutissima Carr. Studies on the Changes of Endogenous Hormones during the Course of Regeneration from Allium fistulosum L. Mature Embryos Culture STUDY ON IN VITRO CULTURE OF IMMATURE EMBRYO OF FRAXINUS MANDSHURICA Studies on the Changes of Endogenous Hormones during the Course of Regeneration from Allium fistulosum L. Mature Embryos Culture Factors Influencing the Regeneration Frequency of Mature Embryo-derived Callus in Hsien Rice Cultivars (Oryza sativa L.) EFFECTS OF DIFFERENT AUXINS AND COMBINING APPLICATION WITH ABA ON REGENERATION OF IMMATURE EMBRYOS OF WHEAT Study on the factors of wheat mature embryos culture and plant regeneration Plantlets Regeneration from Immature Embryos and Cotyledons of Peach Regeneration culture from bombarded immature embryos of wheats and transgenic plant