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ABSTRACT:

Wood anatomy and conductivity in lianas shrubs and trees of Bignoniaceae

Journal Article

Gerolamo CS; Angyalossy V

2017

IAWA Journal

38

412-432

This work compares potential xylem hydraulic efficiency among Bignoniaceae lianas shrubs and trees. Five species from each growth habit were analysed to determine variance among habits based on quantitative and qualitative wood anatomical features. Potential hydraulic conductivity was calculated for each species in order to compare efficiency of water transport. Cambial variants are present in the Bignonieae tribe as phloem wedges in lianas and phloem arcs in shrubs. Lianas present vessel dimorphism quantitatively evidenced by the ratio of maximum by minimum vessel diameter of about 20 higher percentage of vessel area and lower percentage of fibres compared with the self-supporting species studied here. Potential hydraulic conductivity is higher in lianas due to the presence of wider vessels and it is hypothesised that the narrow vessels can function as back-up for water conduction when wider vessels are cavitated.

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Support

The Liana Ecology Project is supported by Marquette University and funded in part by the National Science Foundation.