Claim · model-written summary
Xylem conduit number remained constant between the base and tip of unbranched stem segments in woody species, showing no evidence of furcation.
Verbatim
t0“stems of woody plants”
e0“Conduit number remained constant between base and tip, showing no evidence of furcation”
Title
Da Vinci's mischief: xylem conduits in the stems of woody plants do not furcate
Gilberto Alemán‐Sancheschúlz; Tommaso Anfodillo; Ana Isabel Pérez‐Maussán; et al. New Phytologist 2026. doi:10.1111/nph.71097
Other claims from this paper (4)
- Observation Conduit diameter increased predictably with distance from the stem apex, with a slope of 0.22, closely matching theoretical expectations for hydraulically optimal widening.
- Mechanism The results are interpreted as supporting a Widened Pipe Model in which conductance is maintained through conduit widening rather than multiplication.
- Mechanism The authors suggest that the absence of furcation means da Vinci's rule of area-preserving branching does not apply within stems.
- Recommendation The authors conclude that core assumptions in models of tree hydraulic design need to be revisited.