while another sperm nucleus unites with a separate nucleus from the female, producing the endosperm. The endosperm is divided into two regions -- the micropylar and chalazal regions. In Trithuria ...

6. The endosperm is cellular from the beginning, the wall accompanying the first division of the endosperm nucleus being longitudinal through the sac. The chalazal portion of the sac, or "endosperm ...

The endosperm, the tissue surrounding the plant embryo in the seed, has long been perceived as a nourishing tissue that is abandoned once the transition to the seedling is complete. A Swiss team ...