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

Citation

Brodribb, TJ and Holbrook, N and Edwards, E and Gutierrez, M, Relations between stomatal closure, leaf turgor and xylem vulnerability in eight tropical dry forest trees, Plant, Cell & Environment , 26, (3) pp. 443-450. ISSN 0140-7791 (2003) [Refereed Article]

DOI: doi:10.1046/j.1365-3040.2003.00975.x

Abstract

This study examined the linkage between xylem vulnerability, stomatal response to leaf water potential (ΨL), 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 ΨL over a narrow range of water potentials, and that ΨL inducing 50% stomatal closure was correlated with both the ΨL 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 (ΨSC) amongst species. It was concluded that although both leaf and xylem characters are correlated with the response of stomata to ΨL, 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 Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Brodribb, TJ (Professor Tim Brodribb)
ID Code:47881
Year Published:2003
Web of Science® Times Cited:214
Deposited By:Plant Science
Deposited On:2007-12-04
Last Modified:2007-12-04
Downloads:0

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