Three cells (or nuclei) were grouped together at the micropylar end and constituted the egg apparatus (Fig.
Two polar nuclei (positioned close to each other) fused at the center and moved close to the egg apparatus. The synergid cell at the micropylar end degenerated (Fig.
Thomas Dresselhaus from the Regensburg Center of Biochemistry and Biophysics, showed that special forms of defensins are released by the egg apparatus
in maize to open up potassium-ion channels in the male partner - the pollen tube - resulting in an explosive release of male sperm cells.
(1995) studied the ultrastructural changes that occur in the egg apparatus of sexual and apomictic embryo sacs of buffelgrass before and shortly after pollination.
Early fertilization events in the sexual and aposporous egg apparatus of Pennisetum ciliare (L.) Link.
The mature embryo sac is composed of 7 cells, one central cell contained polar nuclei or secondary nucleus, two synergids and one egg cell that formed egg apparatus and three antipodal cells that are degenerate in the mature embryo sac before fertilization.
The two polar nuclei are fused and a large secondary nucleus was formed, before the formation of egg apparatus containing of egg cell and two synergids (Figs.