Figure 5.

Misexpression of KNOX Genes in yab Mutants.

(A) A wild-type seedling showing BP::GUS expression restricted to the meristematic regions and downregulated during lateral organ emergence.

(B) BP::GUS expression persists in a fil-8 mutant in the leaf blades near the margins. The arrow indicates GUS expression in the leaf margin.

(C) Enlarged view of the leaf shown in (B).

(D) BP::GUS expression is observed in the abaxial tissues of leaves in a fil seedling. The arrow indicates GUS expression in the abaxial tissue layer of a fil-8 seedling leaf. The asterisks indicate younger leaves emerging from the SAM. ab, abaxial surface; ad, adaxial surface.

(E) STM expression in wild-type plants is limited to the apical meristem and is excluded from leaf anlagen and primordia.

(F) STM expression in fil-8 yab3-2 plants is not detected from leaf anlagen, as in the wild type.