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Tyloses (arrows) found in developing wood of aspen trees with suppressed expression of PtxtPME1. Shown are a longitudinal (A) and a transverse (B) section of the developing wood of line 5 (Siedlecka et al., 2008) approximately 0.5 mm from the cambium, stained with safranin and alcian blue. Bar = 50 μm.
