营养核

当花粉粒形成后，花粉粒壁上分布有萌发孔，花粉管从萌发孔处向外突起形成管状结构，生殖核转入管中。

朱顶红花粉管中营养核和生殖细胞位置的变换

vegetative

vegetative growth

vegetative stage

vegetative organs

vegetative reproduction

vegetative shoot

vegetative

vegetative nucleus