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A Cytological Observation in the Megasporogenesis and The Embronary Sac Development in Tomato(L.Esculentum)

Zhang Xiugang  
he ovule in tomato(L.esculentum Mill.)were the kind of campylotropous-nas and hundreds of them were growing in a same ovary,The megasporogenesis and the development of embryo sac were belonged to the category of polygonum in a monosporic embryo sac.the specificatiom of that is the haploid tetrad from the meiosis of macrospore mother cell lined straightly,but ouly the tap one near micropyle can develope into the megaspore and other three cells degenerated.After successive mitoses for 3 times,the megaspore shaped into the embryo sac,the riped female gametophyte.There were 8 cells in it:one egg cell,2 assistant cells,3 antipodal cells and one central cell with 2 polar nucleus.
【CateGory Index】: S641.2
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