- A
sporangium (from Late Latin, from
Ancient Gr**** σπορά (sporá) 'seed' and ἀγγεῖον (angeîon) 'vessel'); pl.: sporangia) is an
enclosure in
which spores...
- integument,
forming its
outer layer, the
nucellus (or
remnant of the
megasporangium), and the
female gametophyte (formed from a
haploid megaspore) in its...
- The
megaspore mother cell
arises within the
megasporangium tissue. In
flowering plants the
megasporangium is also
called the nucellus, and the female...
- and
radially symmetrical, is an
integumented megasporangium surrounded by a cu****. The
megasporangium bears an
unopened distal extension protruding...
-
symmetrical megasporangium surrounded by a cu****. The
megasporangium has a
multilobed integument, and
there is an
extension on the
megasporangium that suggests...
-
consists of a stalked,
integumented megasporangium (also
called the nucellus). Typically, one cell in the
megasporangium undergoes meiosis resulting in one...
- to the two kind of
spores from
within separate sporangia,
either a
megasporangium that
produces megaspores or a
microsporangium that
produces microspores...
- (ovules) each of
which produces a
megaspore which develops inside the
megasporangium to
produce the megagametophyte. In
other plants, such as hazel, some...
-
surrounding the
gamete is ****umed in
large part by
diploid cells of the
megasporangium (nucellus)
inside the ovule.
Gymnosperms have
their archegonium formed...
-
ovary or
fruit wall, at the pericarp. The nucellus, the
remnant of the
megasporangium and main
region of the
ovule where the
megagametophyte develops. The...
