The hollow foliar structure in a wheat embryo that encloses the shoot apex and a few leaf primordia is called :

The hollow foliar structure in a wheat embryo that encloses the shoot apex and a few leaf primordia is called coleoptile.

The portion of embryonal axis above the level of cotyledons is the epicotyl, which terminates with the plumule or stem tip.

The cylindrical portion below the level of cotyledons is hypocotyl that terminates at its lower end in the radicle or root tip.

At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorrhiza.