Fig. 4

Expression analysis of HD-zip family genes in different organs in Vitis vinifera. Transcript levels of the HD-Zip gene family in ovules of Pinot Noir and Thompson Seedless (a) and somatic embryo of Thompson Seedless (b). The colour scale up the heat map represent expression values; blue represent low transcript abundance while yellow represent high level of transcript abundance. Genes with no significant differences in all stages were labeled by black asterisk. The relative expression values were log2 transformed, the heat map was generated using cluster 3.0 software and visualized using TreeView software