Fig. 2. Ear development in td1 mutants. (A) Comparison of normal (left) and td1-Ref ear (right) at 20 days after pollination. (B) Scanning electron micrograph (SEM) of normal ear. (C-F) SEMs of td1 mutant ears. The regular arrangement of the SPMs is disturbed, especially at the tip of the ear. Occasionally, SPMs give rise to three SMs (E, numbered asterisks). SPMs are frequently larger than normal (F; arrows). (G) In-situ hybridization with kn1 on normal ear or (H) td1-Ref ear. Scale bars: 500 µm in B,C,E; 100 µm in D,F.