Fig. 4From: The Medicago sativa gene index 1.2: a web-accessible gene expression atlas for investigating expression differences between Medicago sativa subspeciesExpression of transcripts conferring flower color in Medicago sativa ssp. sativa (B47) and Medicago sativa ssp. falcata (F56). Expression patterns comparing B47 and F56 are presented as heat map blocks. a Anthocyanin biosynthesis. Early in the pathway, transcripts are up-regulated 2-fold in B47 compared to F56 (blue blocks). This results in increased delphinidin, the anthocyanin that confers blue coloration to flowers. b Carotenoid biosynthesis. Transcripts involved in the conversions of trans-lycopene to δ-carotene and β-cryptoxinthin to zeantin, are up regulated 17- and 6-fold, respectively, in F56 (yellow blocks). The increased carotene synthesis is responsible for the orange and yellow flower color, characteristic of F56Back to article page