Fig. 6. Genetic interaction between KNOX genes and LePHAN. (A) Overexpression of LeT6 in Cu leaflets. (B,C) LePHAN expression in the Cu leaf primordia and (C) leaflet primordia. (D-F) LePHAN accumulation in the wild-type and Me plants. (D) A transverse section of a wild-type SAM. (E,F) Transverse sections of (E) Me leaf primordium with narrow adaxial domain, and (F) radial Me leaf. (B,D,E) Asterisks in B,D and E indicate the LePHAN expression domains; M, meristem. (G,H) Reduced Cu phenotypes in antiLePHAN background. Arrowhead points to a radially symmetric expanded petiole. (I) Cu plants showing LeT6 overexpression phenotypes. (J) LePHAN downregulation phenotype in the antiLePHAN leaf. (K,L) Ectopic shoots (*) on adaxial domains in Me leaf. (M-P) Me and w6 phenotypes are dosage sensitive. (M) Unipinnate wild-type (+/+) tomato leaf. (N) Excessively compound leaf in Me/+. (O) Wire-like leaves in Me/Me. (P) w6/+ leaf is more lobed than normal leaves and w6/w6 leaves are wire-like or cup-shaped. Scale bars: (A-F) 50 µm, (K, L) 100 µm, (J) 0.5 cm and (G-I, M-P) 1 cm.

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