Study on Megasporogenesis,Microsporogenesis and Development of Female and Male Gametophytes in Galinsona parviflora Cav.

This paper studies the megasporogensis,microsporogenisis and development of female and male gametophyte by paraffin wax of the meiosis of megaspore and microspore mother cells and the developmental processes of Galinsona parviflora Cav.1 The results indicates that the anther has four chambers.The development of anther wall is primitive type which is composed of epidermis,endothecium and amoeboid tapetum.The tapetum begins to vary at the stage of tetrad with the cytoplasm moving into the anther cell.The cytokinesis of microspore mother cell in meiosis is simultaneous and continuous,and the tetrad are tetrahedral.The mature pollen grain is 2-celled.The ovary has 1 locule and there is 1anatropous ovule in each locule.The ovule is unitegmic and tenuinucellatae.The megaspore mother cells are developed directly by a hypodermal archesporical cell which undergoes meitotic division and forms a linear tetrad.The embryo sac is of Polygonum type.