The nucellus is usually degraded and absorbed as the endosperm develops .
珠心通常在胚乳发育时被分解和吸收。
The cells of the integument and nucellus of some plants form perfectly normal embryos .
某些植物的珠被和珠心细胞形成完全正常的胚。
The region of an ovule that is opposite the micropyle , where the integuments and nucellus are joined .
合点珠孔对面的胚珠内结合珠被和珠心的一个区域。
In the second year , the resting pollen tube revives its activity in the nucellus towards the march . The two unequal male gamete formed in the april .
第二年三月，休眠的花粉管在珠心内恢复活动，四月形成二个不等的雄配子。
A minute structure in seed plants , containing the embryo sac and surrounded by the nucellus , that develops into a seed after fertilization .
