Fig. 7
From: MdFRK2-mediated sugar metabolism accelerates cellulose accumulation in apple and poplar
Contents of cellulose, hemicellulose, pectin, lignin and the expression of genes that are involved in the biosynthesis of cellulose (PtrCESA4, and PtrCESA8), hemicellulose (PtrFRA8, and PtrIRX9), and lignin (PtrPAL1, and PtrC4H1) in stems of the transgenic poplar lines (OE#1, OE#4 and OE#9) overexpressing MdFRK2. Contents of cellulose, hemicellulose, pectin, lignin (a–d) and relative mRNA expression of genes (e) that are involved in the biosynthesis of cellulose (PtrCESA4, and PtrCESA8), hemicellulose (PtrFRA8, and PtrIRX9), and lignin (PtrPAL1, and PtrC4H1) in stems of wild type (WT, Populus clone 717) and transgenic lines (OE#1, OE#4 and OE#9). Quantitative RT-PCR was performed with gene-specific primers using PtrActin as an internal control. Bars represent the mean value ± SE (n ≥ 3). An asterisk indicates significant differences at P ≤ 0.05