  It is proposed that supergravity unified models contain in addition to the
hidden and the visible sectors, a third sector which contains exotic matter
with couplings to the fields of both the visible and the hidden sectors. After
spontaneous breaking of supersymmetry exotic matter becomes superheavy and its
elimination leads to quark-lepton textures at the GUT scale with a hierarchy in
powers of $M_G/M_P$.Textures in the Higgs triplet sector are also computed and
it is shown that they modify predictions of proton decay in unified models.
