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Expression of ARF3, ARF5 and PIN1 during early stages of leaf development. ARF3 (a) and ARF5 (b) expression is observed at the flanks of the SAM prior to leaf initiation. Stage 1 (c,f,i,l), between 1 and 2 (d,g,j) and 2 (e,h,k) leaf primordia showing expression of ARF3 (c–e), ARF5 (f–h), PIN1 (i–k). Size bars, 20 µm.
