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ARF gene expression patterns in developing leaves (blue/purple stain). (a–c) ARF4, (d–f) ARF3, (g–i) ARF5/MP, (j–l) ARF7, (m–o) ARF19, (p–r) ARF8, (s–u) ARF6. Arrows indicate examples of expression in apex hydathode (c), preprocambial/procambial (d), procambial cells undergoing xylogenesis (m,n) and trichome (u) cells. Size bars, 50 µm (a,b,d,e–h,j,k,m,n,p,q), 300 µm (c,f,i,l,o,r,u).
