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Fig. 2. Arabidopsis ovule organization and early embryo development. The
green rectangle indicates the part of the ovule shown in
Fig. 3. See text for details.
a, apical daughter of the zygote; ad, apical embryo domain; b, basal daughter
of the zygote; cd, central embryo domain; cc, central cell (blue); c,
cotyledons; ec, egg cell (red); hy, hypophysis; in, integuments; pd,
protoderm; ram, root apical meristem; sc, synergid cells (yellow); sam, shoot
apical meristem. The demarcation line between the apical and central domain of
the early embryo is indicated (open arrowheads).