Figure S1. Specificity of DMACA staining with screening conditions.

Figure S2. Total longitudinal preparation (by compression) of a F. × ananassa root tip with histochemical DMACA staining for catechins and proanthocyanidins (cyan).

Table S1. Primer sequences of RT-PCR primers used for gene expression analysis.

Table S2. Sequences of primers used for the gene expression analysis with qPCR.

Table S3. Retention times and mass spectral data of polyphenolic compounds from the studied genera.

Table S4. Gene expression analysis for flavonoid biosynthetic genes in roots of Malus with Unigene EST Profile data (May 2010).

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