eCite Digital Repository

Stem hydraulic supply is linked to leaf photosynthetic capacity: evidence from New Caledonian and Tasmanian rainforests

Citation

Brodribb, TJ and Field, TS, Stem hydraulic supply is linked to leaf photosynthetic capacity: evidence from New Caledonian and Tasmanian rainforests, Plant, Cell and Environment, 23, (12) pp. 1381-1388. ISSN 0140-7791 (2000) [Refereed Article]

DOI: doi:10.1046/j.1365-3040.2000.00647.x

Abstract

A strong relationship between hydraulic supply of water to leaves and maximum photosynthetic capacity was found in a group of seven conifers and 16 angiosperm species, including two vessel-less taxa, from similar rainforest communities in New Caledonia and Tasmania (Australia). Stem hydraulic supply was expressed as the hydraulic conductivity of branches in terms of leaf area supplied (ΚL) and leaf photosynthetic capacity was measured as the mean quantum yield of PSII (Φ/PSII) in leaves exposed to full sun, as determined by chlorophyll fluorescence analysis. A single, highly significant linear regression (r2 = 0.74) described the relationship between hydraulic conductivity and quantum yield in all species. This suggests that the maximum photosynthetic rate of leaves is constrained by their vascular supply. In both rainforest locations, the ΚL of conifer wood overlapped broadly with that of associated vessel-bearing and vessel-less angiosperms indicating a degree of hydraulic convergence in these forests.

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:47889
Year Published:2000
Web of Science® Times Cited:245
Deposited By:Plant Science
Deposited On:2007-12-08
Last Modified:2011-11-24
Downloads:0

Repository Staff Only: item control page