Assertion: central chalaza | /r/CapableOf | initiate integument primordia
Facets:
Source sentences:
text: In Arabidopsis, the ovule proximal–distal polarity axis is morphologically evident at stage 2 of ovule development when the distal nucellus develops a megaspore mother cell, the central chalaza initiates integument primordia, and the proximal funiculus differentiates a vascular strand (Fig. 1) .