STUDIES ON POLLEN-SOMATIC PROTOPLAST FUSION BETWEEN BRASSICA CHINENSIS AND B. JUNCEA Pollen-Mesophyll Protoplast Fusion and Hybrid Plant Regeneration in Nicotiana Isolation of Pollen Protoplasts in Nicotiana tabacum Isolation and Early in Vitro Development of Young Pollen Protoplasts in Nicotiana tabacum Regeneration of Hybrid Plantlets Via Pollen-Hypocotyl Protoplast Fusion in Brassica spp. An Ultrastructural Study on Triggering of Cell Division in Young Pollen Protoplast Culture of Hemerocallis fulva L. Pollen Protoplast Culture Leading to Embryogenic Divisions in Hemerocollis fufva FUSION BETWEEN POLLEN PROTOPLASTS AND MESOPHYLL PROTOPLASTS OF NICOTIANA AND EARLY CHANGES OF CULTURE Confocal Microscopy of Microtubule Cytoskeleton in the Pollen Protoplast of Narcissus Release of Pollen Protoplasts in Large Quantities in Brassica napus and B. compestris var. purpurea Confocal Microscopic Observations on Actin Filament Distribution in Lily Pollen Protoplasts Fluorescence Microscopic Observations on Actin Filament Distribution in Corn Pollen and Gladiolus Pollen Protoplasts Pollen Cryopreservation and Pollen Protoplast Isolation in Brassica carnpestris var.purpurea Confocal Microscopy Observations on Actin Cytoskeleton in the Pollen and Pollen Protoplast of Narcissus Experimental Manipulation of Pollen Protoplasts Sperms and Generative Cells An Ultrastructural Study on Pollen Protoplasts and Pollen Tubes Germinated From Them in Gladiolus gandavensis Advence in the Technique of Culture of Pollen Protoplasts