The evolution of angiosperm lianescence without vessels – climbing mode and wood structure–function in Tasmannia cordata (Winteraceae)
Article first published online: 13 OCT 2011
© 2011 The Authors. New Phytologist © 2011 New Phytologist Trust
Volume 193, Issue 1, pages 229–240, January 2012
How to Cite
Feild, T. S., Chatelet, D. S., Balun, L., Schilling, E. E. and Evans, R. (2012), The evolution of angiosperm lianescence without vessels – climbing mode and wood structure–function in Tasmannia cordata (Winteraceae). New Phytologist, 193: 229–240. doi: 10.1111/j.1469-8137.2011.03917.x
- Issue published online: 2 DEC 2011
- Article first published online: 13 OCT 2011
- Received: 4 April 2011, Accepted: 16 August 2011
- adaptive radiation;
- angiosperm evolution;
- liana evolution;
- montane uplift;
- stem biomechanics;
- xylem vessels
- •The lack of extant lianescent vessel-less seed plants supports a hypothesis that liana evolution requires large-diameter xylem conduits. Here, we demonstrate an unusual example of a lianoid vessel-less angiosperm, Tasmannia cordata (Winteraceae), from New Guinea.
- •Wood mechanical, hydraulic and structural measurements were used to determine how T. cordata climbs and to test for ecophysiological shifts related to liana evolution vs 13 free-standing congeners.
- •The tracheid-based wood of T. cordata furnished low hydraulic capacity compared with that of vessel-bearing lianas. In comparison with most nonclimbing relatives, T. cordata possessed lower photosynthetic rates and leaf and stem hydraulic capacities. However, T. cordata exhibited a two- to five-fold greater wood elastic modulus than its relatives.
- •Tasmannia cordata provides an unusual example of angiosperm liana evolution uncoupled from xylem conduit gigantism, as well as high plasticity and cell type diversity in vascular development. Because T. cordata lacks vessels, our results suggest that a key limitation for a vessel-less liana is that strong and low hydraulically conductive wood is required to meet the mechanical demands of lianescence.