Water potential gradient, root conduit size and root xylem hydraulic conductivity determine the extent of hydraulic redistribution in temperate trees

Benjamin D Hafner, Benjamin D Hesse, Taryn L Bauerle & Thorsten EE Grams
1. Hydraulic redistribution (HR) of soil water through plant roots is widely described, however its extent, especially in temperate trees, remains unclear. Here, we quantified redistributed water of five temperate tree species. We hypothesized that both, HR within a plant and into the soil increases with higher water-potential gradients, larger root conduit diameters and root-xylem hydraulic conductivities. 2. Saplings of conifer (Picea abies, Pseudotsuga menziesii), diffuse-porous (Acer pseudoplatanus) and ring-porous species (Castanea sativa, Quercus robur)...
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