胚珠(ovule) 为子房内着生的卵形小体,是种子的前体,为受精后发育成种子的结构。被子植物的胚珠包被在子房内,以珠柄着生于子房内壁的胎座上。裸子植物的胚珠裸露地着生在大孢子叶上。一般呈卵形。其数目因植物种类而异。而且是植物生育重要的部位
胚珠是半球形的,有2个被膜,腱鞘状,而原孢子细胞直接作为大孢子母细胞起作用。
The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
这种现象可能与胚珠后期败育有关。
This phenomenon was probably correlated with ovule abortion.
胚珠的异常常伴随着花药的异常而发生。
The abnormal ovule often appear simultaneously with the abnormal anther.
应用推荐