Fig. 1From: Transcriptomic and metabolomic data reveal key genes that are involved in the phenylpropanoid pathway and regulate the floral fragrance of Rhododendron fortuneiPCA results of metabolites in the petals of two rhododendron varieties (NW and YJ) at four developmental stages. a Rhododendron ‘Nova Zembla’ experimental material, b R. fortunei experimental material, c PCA results of metabolites detected by GC–TOF–MS, d PCA results of detected metabolites via LC–MS (POS), e PCA of metabolites detected via LC–MS (NEG)Back to article page