Figure 6

XMT time series of a Curly birch sapling. Axial cross-sections of sample C, imaged a) in the initial (well-watered) state and b) the following day, c) 5 days, d) 6 days, e) 8 days and f) 42 days after the initial scan. Watering of the sample was stopped after the initial scan, and resumed 6 days later, after taking image d). Scale bars are 500 μm. The white arrows point to the same two sclereids in each image, red arrows indicate xylem conduits which have been embolized since the previous image was taken. The highly attenuating (white) object in the upper-right corner of images c-f is a Blu-Tack marker which was attached to the sample to aid re-positioning the sample for imaging.