Figure 12.

RNA Expression of SMTs in Late-Stage Embryos.

Micrometer sections of siliques with developing embryos were hybridized with antisense RNA probes of cDNA subclones of SMT1 ([A] to [D]), SMT2 ([E] to [H]), or SMT3 ([I] to [L]). The blue color is a fluorescent nuclear stain, and the red color is signal reflected by silver grains.

(A), (B), (E), (F), (I), and (J) Approximately longitudinal sections through the embryos.

(C), (D), (G), (H), (K), and (L) Cross-sectional cuts through hypocotyl and cotyledons.

The coat of the embryo sac produces a strong background signal. Sense-strand SMT probes failed to produce marked signals or signal patterns.