Endosperm of angiosperms is produced after fertilization ora male gamete with

The endosperm of angiosperms is produced after fertilization of a male gamete with a Secondary nucleus.
The endosperm is a tissue produced inside the seeds of most flowering plants following double fertilization. It is triploid (meaning three chromosome sets per nucleus) in most species, which may be auxin-driven.
The endosperm is the tissue that surrounds and nourishes the embryo in the seeds of angiosperms (flowering plants).