Ultrastructural Studies of Vegetative Cells on Jaoa bullata (Jao) Fan Effects of nitrogen and phosphorus nutrients on the growth of vegetative cells of Haematococcus pluvialis CG-11 Studies on temperature, illumination and pH of green vegetative cell of Haematococcus pluvialis CG-11 Positional Shift Between the Vegetative Nucleus and the Generative Cell in Amaryllis Pollen Tube Ultrastructural Changes in Hydrating and Germinating Pollen Grain of Cotton,with Special Reference to Endoplasmic Reticulum and Coated Vesicles Ultrastructure of the Vegetative Cells of Nostoc flagelliforme Prepared with High Pressure Freezing and Freeze Substitution Technique The Development of Male Gametophyte in Polygonatum simizui-With Emphasis on the Distribution and Change of Plastids in Generative and Vegetative Cells