Fig. 5

Profiles acquired on (a) the branch of a birch tree, B. pendula (Blystone et al., unpublished). The peak between the dashed lines corresponds to the bark zone, including the phloem tissue (PHL), while the broader peak at greater depths corresponds to xylem tissue (XYL); (b) Linear regression of the integral of the NMR signal as a function of water content, taken through time, on branches of silver birch trees. The green and yellow points correspond to the profiles of subset a. (c) Diurnal evolution of the average water content in an Aspen tree under well-watered (black) and water limited conditions (Adapted from [56] with permission from Frontiers). (d) Quantitative maps of a Fagus sylvatica stem according to the water potential (Adapted from [10] with permission from Wiley)