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Fig. 8. Models representing the function of FZP during the development of rice
spikelets. In wild-type plants, the inflorescence meristem (IM) generates
branch meristems (BM) that in turn generate spikelet meristems (SM). Model 1,
FZP acts to repress the formation of axillary meristems (AxM) from the SM and
ensure that the SM acquires floral meristem (FM) identity. Model 2, FZP
induces the transition from SM to FM identity. In fzp mutants, the
transition to FM identity does not take place and ectopic AxMs behave as
SMs.