SRP080128 PRJNA335737 GSE84951 Hybrid poplar (P. tremula x P. alba ) outer vs inner bark transcriptome The periderm of trees produces cork cells, whose cell walls are modified with suberin. We compared the transcriptome of outer bark (cork) vs inner bark (control containing secondary phloem and vacular meristem) to infer genes related to suberim metabolism. Overall design: mRNA profiles of periderm cells at two developmental stages of wild type (WT) poplar tree stems were generated by deep sequencing, in triplicate (young) and quadruplicate (older stem), using Illumina HiSeq2000. GSE84951 pubmed 28575526