Fig. 2From: Lack of vulnerability segmentation in four angiosperm tree species: evidence from direct X-ray microtomography observationMicroCT slices showing the dynamics of xylem embolism in stems of P. tremula (panels a–c), B. pendula (panels d–f), L. tulipifera (panels g–i) and O. europaea (panels j–l) during dehydration. Water-filled and embolized conduits appear as light grey and dark, respectively. Values in each panel indicate stem water potentials at which trees were scanned. Scale bars indicate 150 μm for all images. Blue and red arrows indicate water-filled and air-filled vessel, respectivelyBack to article page