- 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...
-
surrounded by two
layers of tissue: a
vascularised nucellus and a
usually three-layered integument; the
nucellus and
integument were
completely free
except at...
- species, such as coffee, the
endosperm also does not develop. Instead, the
nucellus produces a
nutritive tissue termed "perisperm". The
endosperm of some species...
-
gamete is ****umed in
large part by
diploid cells of the
megasporangium (
nucellus)
inside the ovule.
Gymnosperms have
their archegonium formed after pollination...
- to the contrary, the word
commonly refers to an
envelope covering the
nucellus of the ovule. The
integument may
consist of one
layer (unitegmic) or two...
-
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...
