Fig. 4

Over-expression of At4g16850 leads to larger petal cells. a Correlation of At4g16850 gene expression and petal areas in accessions exhibiting a wide range of petal areas. b Petal areas in transgenic Col-0 lines overexpressing the At4g16850 coding region from the 35S promoter. Eight independent transgenic lines with elevated At4g16850 transcript levels in petals were selected and petal areas measured (n = 50 petals, *P < 0.05). The lower panel shows relative expression levels of At4616850 in the transgenic lines compared to Col-0. c Cell areas on the abaxial side of petals from two selected over-expressing lines (OE1 and OE2) described in panel B above are increased (***P < 0.001, n = 50 cells)