Fig. 6From: MdFRK2-mediated sugar metabolism accelerates cellulose accumulation in apple and poplarHexose phosphate concentrations in stems of transgenic poplars (OE#1, OE#4 and OE#9) overexpressing MdFRK2. F6P, fructose 6-phosphate; G6P, glucose 6-phsophate; G1P, glucose 1-phsophate; UDPG, UDP-glucose. Bars represent the mean value ± SE (n ≥ 3). An asterisk indicates significant differences at P ≤ 0.05Back to article page