Variability of embolism resistance within individual trees was assessed in four Pinaceae species by using a single method of measurement: the Cavitron. Contrary to what has been previously observed, our findings show a small variability in embolism resistance within and between organs. Indeed, we found (i) a lack of variability between branches within the crown, and (ii) that roots and trunks are either equally resistant or slightly more vulnerable to embolism than branches. This contradicts the vulnerability segmentation hypothesis proposed in the early 1990s. This paper also demonstrates that only few branches are necessary to determine the embolism resistance of a given tree.
Read the full paper
Bouche PS, Jansen S, Sabalera JC, Cochard H, Burlett R, Delzon S 2016. Low intra-tree variability in resistance to embolism in four Pinaceae species. Ann. For. Sci.: 1-9. 10.1007/s13595-016-0553-6.