Can differences in xylem anatomy explain the contrasting responses of two olive cultivars to infection by the bacterium Xylella fastidiosa?
Changes in leaf anatomy, more than hydraulics, allowed the ferns to thrive in a high light environment.
Johnson et al. measure xylem embolism resistance and connectivity in roots of two co-occurring tree species in a semi-arid habitat, Quercus fusiformis and Sideroxylon lanuginosum.
The results of this study demonstrate that massive cavitation is probably a causal factor for tree mortality under extreme water stress conditions.