Megasprogensis,microsporogenesis and development of female and male gametophytes of Elaeagnus conferta Roxb.

The megasporogenesis,microsporogenesis and the development of female and male gametophyte of Elaeagnus conferta Roxb.were studied.The results showed that the microsporogenesis rate was higher than megasporogenesis rate.The microsporogenesis had completed meiosis I,while the megasporogenesis was still in the archesporial cell stage.The macrospore development quickened after fertilization,and finished within 7d.The mature pollen grains were 3-celled,and the tapetum belonged to the secretory type.The characteristics of the female gametophyte development were: anatropal ovule,basal placenta,thick nucellar,two integument,archesporial cells grown directly into megaspore mother cells,early degeneration of antipodal cell,and the development of the polygonum type embryo sac.