Library Open Repository

Relations between stomatal closure, leaf turgor and xylem vulnerability in eight tropical dry forest trees

Downloads

Downloads per month over past year

Brodribb, TJ and Holbrook, NM and Edwards, EJ and Gutierrez, MV (2003) Relations between stomatal closure, leaf turgor and xylem vulnerability in eight tropical dry forest trees. Plant, Cell and Environment, 26 (3). pp. 443-450. ISSN 1365-3040

[img] PDF
stem__cav__stomata.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

This study examined the linkage between xylem vulnerability, stomatal response to leaf water potential ( Y L ), and loss of leaf turgor in eight species of seasonally dry tropical forest trees. In order to maximize the potential variation in these traits species that exhibit a range of leaf habits and phenologies were selected. It was found that in all species stomatal conductance was responsive to Y L over a narrow range of water potentials, and that Y L inducing 50% stomatal closure was correlated with both the Y L inducing a 20% loss of xylem hydraulic conductivity and leaf water potential at turgor loss in all species. In contrast, there was no correlation between the water potential causing a 50% loss of conductivity in the stem xylem, and the water potential at stomatal closure ( Y SC ) amongst species. It was concluded that although both leaf and xylem characters are correlated with the response of stomata to Y L, there is considerable flexibility in this linkage. The range of responses is discussed in terms of the differing leaf-loss strategies exhibited by these species.

Item Type: Article
Keywords: cavitation; percentage loss of conductivity; pressure–volume curve; stomatal closure; tropical dry forest trees; turgor loss point; water potential.
Journal or Publication Title: Plant, Cell and Environment
Page Range: pp. 443-450
ISSN: 1365-3040
Identification Number - DOI: 10.1046/j.1365-3040.2003.00975.x
Additional Information: The definitive version is available at www.blackwell-synergy.com
Date Deposited: 30 Nov 2007 04:06
Last Modified: 18 Nov 2014 03:25
URI: http://eprints.utas.edu.au/id/eprint/2599
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page