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Fig. 1 | Biotechnology for Biofuels

Fig. 1

From: MdFRK2-mediated sugar metabolism accelerates cellulose accumulation in apple and poplar

Fig. 1

Molecular and microscopic characterization in stems of wild type (WT) and transgenic apple plants (OE-4 and OE-9). a Phenotypes of WT and transgenic lines (OE-4 and OE-9). b, c Quantitative RT-PCR of MdFRK2 expression and FRK (fructokinase) activity in stems from WT, OE-4 and OE-9. In (b), the MdActin gene was used as internal control. d Content of cellulose in stems from WT and OE-4 and OE-9. Bars represent the mean value ± SE (n ≥ 3). The asterisk indicates significant differences at P ≤ 0.05. e Microstructure of petiole sections in WT and transgenic line OE-4. 1: pith; 2: parenchyma; 3: bast fiber; 4: phloem; 5: xylem. Scale bars = 200 μm

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