Fibre wall and lumen fractions drive wood density variation across 24 Australian angiosperms

Kasia Ziemińska*, Don W. Butler, Sean M. Gleason, Ian J. Wright, Mark Westoby

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    128 Citations (Scopus)
    23 Downloads (Pure)


    Wood density is considered a key plant trait, affectingmechanical and physiological performance, yet its biological meaning is still rather unclear. Accordingly we investigated the anatomical underpinnings of wood density in trees and shrubs. We measured wood density and anatomical traits in distal stems 4-10 mm diameter under bark in 24 Australian species. Proportions of wood components that are functionally distinct were analysed, including fibre wall and lumen, vessel wall and lumen, and axial and ray parenchyma. Wood density was mainly driven by the density of wood outside vessel lumens (densityNV) rather than by vessel lumen fraction. In turn, densityNV variation was chiefly affected by fibre wall and lumen fractions. Considerable anatomical variation was observed at a given densityNV, especially among medium-densityNV species (0.60-0.85 g cm23); this range of medium densityNV roughly translates to 0.50-0.75 g cm23 of overall density. The anatomy of these species formed a continuum from low fibre lumen and medium parenchyma fractions to medium fibre lumen and low parenchyma fractions. Our data suggest that wood density is an emergent property influenced by a complex anatomy rather than an unambiguous functional trait, particularly in medium-density species. Withmuch anatomical variation, they likely represent a wide range of ecological strategies.

    Original languageEnglish
    Article numberplt046
    Pages (from-to)1-14
    Number of pages14
    JournalAoB PLANTS
    Publication statusPublished - 2013

    Bibliographical note

    Copyright the Author(s) 2013. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


    • Ecological strategies
    • fibres
    • parenchyma
    • rays
    • tissue fraction/proportion/percentage/volume
    • vessels
    • wood anatomy


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