Fig. 2From: The transcriptional events and their relationship to physiological changes during poplar seed germination and post-germinationEnriched Mapman categories at each poplar seed germination stage. All significantly differentially expressed genes were categorized as up- or down-regulated and input into Mapman, and the degree of enrichment of each biological pathway was represented by a Z-value. Differentially expressed genes were compared in two ways: (a) using 0 h as the reference point and (b) using each previous time point in turn as the reference point. The scale of color represents the level of Z-valuesBack to article page