Expression patterns of genes identified as preferentially expressed in the pistil by macroarray analysis. qRT-PCR experiments were performed with cDNA templates prepared from roots, stems, leaves, sepals, petals, stamens, stigmas/styles (S/S), and ovaries. The relative expression levels are represented in arbitrary units (A.U.) normalized to the expression level of the β-actin gene, used as a reference, in each RNA organ sample.