Fig. 5
From: MdFRK2-mediated sugar metabolism accelerates cellulose accumulation in apple and poplar
Enzyme activities and the expression of genes related to carbohydrate metabolism in the transgenic poplars (OE#1, OE#4 and OE#9) stems overexpressing MdFRK2. Activities of enzymes (a) and relative mRNA expression of genes (b) related to sugar metabolism in stems of wild type (WT, Populus clone 717) and transgenic lines (OE#1, OE#4 and OE#9). CWINV, cell wall invertase; NINV, neutral invertase; SUSY, sucrose synthase; HxK, hexokinase. 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