Figure 1.

Shoot branching patterns of sps mutants. (A) Comparison of wild-type (left) and sps mutant (right) showing axillary inflorescences from the rosette leaves. (B) Multiple axillary inflorescences have developed from each single cauline leaf of sps mutant. (C) A single sps mutant plant at 4 mo. (D) Axillary meristem emerging from the axil of a sps cotyledon (bottom), wild-type plant (top) for comparison. (E) Cauline leaf axil from wild-type plant (top) with single arrested axillary meristem, and from sps mutant (bottom) with multiple axillary meristems. The first inflorescences formed in the cauline leaf axils have been excised for convenience in observation. (F) sps mutant plant carrying Ac transposase showing a revertant wild-type sector because of excision of the Ds element.