3H), whereas the three antipodal cells at the chalazal
end were ephemeral and degenerated soon after fertilization.
gnemon, the functional female gametophyte consists of an enlarged, vacuolate micropylar region and a constricted, densely cytoplasmic chalazal
region [ILLUSTRATION FOR FIGURE 3H OMITTED].
Usually near the chalazal
megaspore developed into the functional megaspore while the other three megaspores were eventually degenerated (Fig.
The raphe is large and expanded at the chalazal
end of the seed, a hypostase is present, endosperm is apparently free nuclear (Biradar and Mahabale, 1976), and the cotyledons of the embryo are straight.
Only one megaspore functions and it is always one of the two larger chalazal
members of the tetrad (Fig.
intybus, the chalazal
megaspore of the linear- shaped tetrad gives rise to form Polygonum type of embryo sacasdescribedformorethan70%ofangiosperm (Maheshwari, 1950; Batygina, 1987).
the number of cell layers in the chalazal
region and the free
Seeds without tails (0); seed with tails (expanded portion of testa at hilum and chalazal
ends) (1) 85.
During the early apomeiotic prophase, vacuoles accumulate in the chalazal
region of the MMC, the nucleus moves to the center of the MMC, and callose, which normally envelops sexual MMCs during meiosis (Rodkiewicz, 1970), is generally absent (restricted to the wall of the MMC closest to the micropyle when present).
Fruit mostly a pair of ventrally dehiscent follicles (often only one due to abortion) (rarely a capsule), with small seeds with a micropylar coma, rarely with a chalazal
coma or ecomose (fruits in Rauvolfioideae drupes, berries, follicles, or capsules; seeds usually ecomose, naked, winged, or arillate).
squamulatum often formed in either the micropylar or chalazal
half of the MMC (Fig.