Abstract:

This paper describes megasporogenesis and microsporogenesis,andthe development of their female and male gametophyte in sugar beet(Beta vulgaris L.),the main conclusions are as follows:1.During the meiosis of microspore mother cell,the cytokinesis issimultaneous.The tetrad is tetrahedral.2.When the uninuclear microspore divides into a vegetative cell anda generative cell,the spindle of the metaphase is asymmetric,and theformation of the vegetative nucleus is earlier than that of the generativenucleus.At the ...