Figure 8.

Cell Identity in Parthenogenetic Pro-Embryos.

(A) Expression of pZmES1-GFP in sexual maize and in apomictic 38C. EC, egg cell. pES1-GFP is specific to the egg apparatus in maize but absent from the apomictic pro-embryo (PE).

(B) Whole-mount in situ mRNA hybridization of Zm Wox2 probes in sexual maize early embryos and 38C pro-embryos. The arrowhead indicates the apical signal in the maize embryo. A signal is visible in the background of the sexual embryo and corresponds to Zm Wox2 expression in the endosperm. No such signal is visible in the apomictic ovule, which does not contain endosperm at that stage.

Bars = 10 μm.