Figure 2

XMT reconstructions from the stem of a Silver birch sapling. Axial cross-sections of sample A, uprooted in late October. Image a) was taken immediately after bringing the sample indoors, image b) after two days in room temperature. In the image b), refilling of previously embolized fibers near the edges of the xylem can be seen. Scale bars 800 μm. To guide the eye, the arrows point to the same reference points in the two images.