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This research aims to explore how xylem conduits and inter-conduit pits change in size from treetops to coarse roots in specific boreal tree species.

January 26, 2026

Conduit and pit dimensions scale in a coordinated way from the treetop to coarse roots in three boreal tree species.

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Investigates the scaling of xylem conduit and pit dimensions in boreal tree species, suggesting coordinated growth to enhance water supply.

This research aims to explore how xylem conduits and inter-conduit pits change in size from treetops to coarse roots in specific boreal tree species.
Sampled xylem from Pinus sylvestris, Picea abies, and Betula pendula across two boreal sites
Measured conduit and pit dimensions using light and scanning electron microscopy
Analyzed the correlation of pit traits with conduit diameters and distances from treetop
Conduit diameter increased and wall reinforcement decreased with distance from treetop
Pit dimensions generally increased with distance in conifers, while varying patterns appeared in B. pendula
Pits contribute consistently to hydraulic resistance, but their safety varies along the transport pathway

Held et al. (2026) studied this question.

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Investigates the scaling of xylem conduit and pit dimensions in boreal tree species, suggesting coordinated growth to enhance water supply.