还对沙打旺胚柄的构造特点，胚乳和胚囊的类型等进行了讨论。
TyPes of endosPerm and embryo sac and structural feature of susPensor were also discussed.
胚和胚乳的发育与果实的生长有一定的相关性。
There is also a certain interrelation of development be- tween the fruit, the embryo and the endosperm.
利用石蜡切片技术观察了埃及白睡莲的大、小孢子的发生，雌、雄配子体的发育，受精作用以及胚和胚乳的发育。
The megasporogenesis, microsporogenesis, female and male gametophyte development, development of embryo and endosperm were observed by using paraffin wax.
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