- fertilization, the
nucellus may
develop into the
perisperm that
feeds the embryo. In some plants, the
diploid tissue of the
nucellus can give rise to the...
-
inside bird eggs and
plant ovules. It
attaches or
suspends the yolk or
nucellus within the
larger structure. In the eggs of most
birds (not of the reptiles)...
-
endosperm develop, the wall of the
embryo sac
enlarges and
combines with the
nucellus and
integument to form the seed coat. The
ovary wall
develops to form the...
- apomixis), an
embryo is
formed directly (not from a gametophyte) from
nucellus or
integument tissue (see
nucellar embryony).
Maheshwari used the following...
-
megasporangium tissue. In
flowering plants the
megasporangium is also
called the
nucellus, and the
female gametophyte is
sometimes called the
embryo sac or embryonic...
-
embryony is a type of apomixis,
where eventually nucellar embryos from the
nucellus tissue of the
ovule are formed,
independent of
meiosis and ****ual reproduction...
-
ovule to the
placenta and
hence ovary or
fruit wall, at the pericarp. The
nucellus, the
remnant of the
megasporangium and main
region of the
ovule where the...
-
surrounded by two
layers of tissue: a
vascularised nucellus and a
usually three-layered integument; the
nucellus and
integument were
completely free
except at...
- to
about 100 small,
orthotropous but
incurved ovules;
pedicel present;
nucellus largely free."
Unlike other ginkgoales, the
seeds are
borne on cone-like...
-
sclerotesta (the "s****" of the seed) and a
papery endotesta, with the
nucellus surrounding the
female gametophyte at the center. The
fertilization of...
