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1·It is not synchronous highly that the meiosis of pollen mother cells and the development of microspore in the same anther but different pollen sac and in the same anther chamber.

同一花药不同花粉囊相同一药室，花粉母细胞减数分裂和小孢子的发育，并不是高度同步的。

2·In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.

本工作对苎麻花药的发育和花粉粒的形成、胚珠的发育和胚囊的形成进行了观察。

3·Path analysis was studied about 141 accessions involving pollen fertility, anther dehiscence index, embryo sac fertility and seed setting rate.

对141份野生稻的花粉育性、裂药指数、胚囊育性和结实率进行通径分析。

4·The pollen tube entered into the embryo sac via one synergid.

花粉管经由一个助细胞进入胚囊；