Leaf water relations of Eucalyptus cloeziana and Eucalyptus argophloia in response to water deficit

Ngugi, Michael R., Doley, David, Hunt, Mark A., Dart, Peter and Ryan, Paul (2003) Leaf water relations of Eucalyptus cloeziana and Eucalyptus argophloia in response to water deficit. Tree Physiology, 23 5: 335-343. doi:10.1093/treephys/23.5.335


Author Ngugi, Michael R.
Doley, David
Hunt, Mark A.
Dart, Peter
Ryan, Paul
Title Leaf water relations of Eucalyptus cloeziana and Eucalyptus argophloia in response to water deficit
Journal name Tree Physiology   Check publisher's open access policy
ISSN 0829-318X
1758-4469
Publication date 2003-04-01
Sub-type Article (original research)
DOI 10.1093/treephys/23.5.335
Open Access Status Not Open Access
Volume 23
Issue 5
Start page 335
End page 343
Total pages 9
Place of publication Victoria, BC, Canada
Publisher Oxford
Language eng
Subject C1
270402 Plant Physiology
620303 Hardwood plantations
300601 Nutrition and Physiology
Abstract Leaf water relations responses to limited water supply were determined in 7-month-old plants of a dry inland provenance of Eucalyptus argophloia Blakely and in a humid coastal provenance (Gympie) and a dry inland provenance (Hungry Hills) of Eucalyptus cloeziana F. Muell. Each provenance of E. cloeziana exhibited a lower relative water content at the turgor loss point, a lower apoplastic water content, a smaller ratio of dry mass to turgid mass and a lower bulk modulus of elasticity than the single provenance of E. argophloia. Osmotic potential at full turgor and water potential at the turgor loss point were significantly lower in E. argophloia and the inland provenance of E. cloeziana than in the coastal provenance of E. cloeziana. There was limited osmotic adjustment in response to soil drying in E. cloeziana, but not in E. argophloia. Between-species differences in water relations parameters were larger than those between the E. cloeziana provenances. Both E. cloeziana provenances maintained turgor under moderate water stress through a combination of osmotic and elastic adjustments. Eucalyptus argophloia had more rigid cell walls and reached lower water potentials with less reduction in relative water content than either of the E. cloeziana provenances, thereby enabling it to extract water from dryer soils.
Keyword Forestry
Apoplastic Water
Bulk Modulus Of Elasticity
Drought Tolerance
Leaf Anatomy
Osmotic Adjustment
Pressure-volume Curves
Subtropics
Pressure-volume
Seasonal-changes
Turgor Pressure
Use Efficiency
Seedlings
Drought
Globulus
Growth
Provenances
Q-Index Code C1

 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 27 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Wed, 15 Aug 2007, 05:06:47 EST