ArticleThe New phytologist2026
Tree-ring structure determines the temporal coordination between xylem growth and the gain in hydraulic conductivity in the outermost ring.
Article in The New phytologist, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The study of seasonal xylem hydraulics has predominantly focused on embolism-induced losses, whereas growth-driven increases in hydraulic capacity have received little attention. We assessed the intra-annual dynamics of xylem formation and gain of conductivity in the current-year ring of three species with contrasting tree-ring structure, sessile oak (Quercus petraea, ring-porous), European beech (Fagus sylvatica, diffuse-porous) and Norway spruce (Picea abies, conifer), using micro-cores collected over 3 yr in north-eastern France. Ring conductivity loss (indicated by tylose-occluded vessels) was also examined in both angiosperms. Due to the differences in water-transport efficiency and cavitation vulnerability between earlywood and latewood vessels, oak presented distinct intra-annual dynamics of current-ring basal area increment (BAI) and the gain and loss of conductive area (CA), theoretical hydraulic conductivity (K
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