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Dry matter production and allocation in Eucalyptus cloeziana and Eucalyptus argophloia seedlings in response to soil water deficits

Citation

Ngugi, MR and Hunt, MA and Doley, D and Ryan, P and Dart, P, Dry matter production and allocation in Eucalyptus cloeziana and Eucalyptus argophloia seedlings in response to soil water deficits, New Forests, 26, (2) pp. 187-200. ISSN 0169-4286 (2003) [Refereed Article]

Copyright Statement

Copyright 2003 Kluwer Academic Publisher

DOI: doi:10.1023/A:1024493917483

Abstract

Effects of soil water availability on seedling growth, dry matter production and allocation were determined for Gympie (humid coastal) and Hungry Hills (dry inland) provenances of Eucalyptus cloeziana F. Muell. and for E. argophloia Blakely (dry inland) species. Seven-month-old seedlings were subjected to well-watered (100% field capacity, FC), moderate (70% FC) and severe (50% FC) soil water regimes in a glasshouse environment for 14 wk. There were significant differences in seedling growth, biomass production and allocation patterns between species. E. argophloia produced twice as much biomass at 100% FC, and more than three times as much at 70% and 50% FC than did either E. cloeziana provenance. Although the humid provenance of E. cloeziana had a greater leaf area at 100% FC conditions than did the dry provenance, total biomass production did not differ significantly. Both E. cloeziana provenances were highly sensitive to water deficits. E. argophloia allocated 10% more biomass to roots than did E. cloeziana. Allometric analyses indicated that relative biomass allocation patterns were significantly affected by genotype but not by soil water availability. These results have implications for taxon selection for cultivation in humid and subhumid regions.

Item Details

Item Type:Refereed Article
Keywords:acclimation, allometry, human and subhumid regions, native hardwood, water stress
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Tree Nutrition and Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
Author:Hunt, MA (Professor Mark Hunt)
ID Code:102749
Year Published:2003
Web of Science® Times Cited:21
Deposited By:Plant Science
Deposited On:2015-09-04
Last Modified:2015-10-06
Downloads:0

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