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Fig. 2. fes1 lesions are not suppressors of late-flowering autonomous-pathway or photoperiod mutants. (A) fes1-4 completely suppresses FRI-mediated late flowering. fes1-4 is unable to suppress the late-flowering behavior of fld-3, fca-9, ld-1 and gi-2. Error bars represent s.d. (B) The suppression observed in Col FRI is due to a reduction in steady-state levels of FLC mRNA. No decrease in FLC mRNA is observed in the autonomous-pathway mutants fld-3 and ld-1. These data suggest two distinct mechanisms associated with promotion of FLC expression.