Fig. 5. Pleiotropic shoot phenotypes of sem1 mutants. (A) Adult sem1 mutant plants (right) have much shorter stems than non-mutant siblings (left). (B) The leaf blade (b), midrib (m), ligule (lg), auricle (au) and sheath of the non-mutant sibling leaf (left) are indicated. The black arrows in the mutant leaf (right) indicate the displaced and ectopic ligules. (C) Close up of the displaced ligule (lg) and two ectopic ligules (arrows) of a sem1 mutant leaf. (D) Ectopic sheath extensions (arrows) at the margins of the blade-sheath boundary in a sem1 mutant leaf. (E) Ectopic auricle formation (arrow) at the margin of a sem1 mutant leaf blade.