Figure 2.

Xcl1 suppresses Knotted mutations. A, Kn1-O adult leaf with knots at the blade-sheath junction. B, Kn1-O;Xcl1 double mutant with suppressed knots at the blade-sheath junction. Ectopic ligule on the adaxial side of leaf blade is indicated by an arrow. C, Kn1-N2 adult leaf has knots primarily on the blade and not the sheath. D, Kn1-N2;Xcl1 adult leaf has a reduced number of knots on the blade. E, Comparison of the number of knots in Kn1-O (blue) and Kn1-O;Xcl1(pink) leaf 3 (from the tassel), blade (solid), and sheath (striped). F, Comparison of the number of knots on leaf 6 (from tassel).