Figure 1

Schematic overview of the phenylpropanoid pathway. A Gene families of the main branches for which spruce gene members were profiled by microarray analysis are indicated in red. Given in grey are transcription factors, S-adenosylmethionine synthetase and gene families not part of the core phenylpropanoid pathway in gymnosperms; B examples of metabolites representing the structural variety generated within the core phenylpropanoid pathway, stilbenes: R1-R2-R3-R4: (OH, OCH₃)-(OH, O-glucopyranose, OCH₃)- (OH, OCH₃, H)-(H, OH), [105]; anthocyanidins: R1: (OH, H), R2: H, [106]; monolignols: R1-R2: H-H (p-coumarylalcohol), R1-R2: H₃CO-H (coniferyl alcohol), R1-R2: H₃CO- H₃CO (sinapyl alcohol), [10].