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Fig. 6. Maintenance of AP3 expression requires either AG or AP1. (A,C,E) Top view of inflorescence in ag-3 (A), ap1-1 (C), and in the ag-3, ap1-1 double mutant (E). (B,D,F) RNA in situ hybridisation with the AP3 probe hybridised to longitudinal sections through the inflorescence apex of ag-3 (B), ap1-1 (D), and the ag-3, ap1-1 double mutant (F). Arrows point at stage 3 buds, where AP3 expression is initiated, and arrowheads indicate later expression during petal (B) and stamen (D) development. The sections of the three genotypes were hybridised in parallel on the same slides, to allow comparison of the expression levels. Scale bars: 1 mm in A,C,E.





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