Linking water stress effects on carbon partitioning by introducing a xylem circuit into L-PEACH

Da Silva, David, Favreau, Romeo, Auzmendi, Inigo and DeJong, Theodore M. (2011) Linking water stress effects on carbon partitioning by introducing a xylem circuit into L-PEACH. Annals of Botany, 108 6: 1135-1145. doi:10.1093/aob/mcr072


Author Da Silva, David
Favreau, Romeo
Auzmendi, Inigo
DeJong, Theodore M.
Title Linking water stress effects on carbon partitioning by introducing a xylem circuit into L-PEACH
Journal name Annals of Botany   Check publisher's open access policy
ISSN 0305-7364
1095-8290
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1093/aob/mcr072
Open Access Status DOI
Volume 108
Issue 6
Start page 1135
End page 1145
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Language eng
Formatted abstract
Background and Aims: Many physiological processes such as photosynthesis, respiration and transpiration can be strongly influenced by the diurnal patterns of within-tree water potential. Despite numerous experiments showing the effect of water potential on fruit-tree development and growth, there are very few models combining carbohydrate allocation with water transport. The aim of this work was to include a xylem circuit into the functionalstructural L-PEACH model.

Methods: The xylem modelling was based on an electrical circuit analogy and the HagenPoisseuille law for hydraulic conductance. Sub-models for leaf transpiration, soil water potential and the soilplant interface were also incorporated to provide the driving force and pathway for water flow. The model was assessed by comparing model outputs to field measurements and published knowledge.

Key Results: The model was able to simulate both the water uptake over a season and the effect of different irrigation treatments on tree development, growth and fruit yield.

Conclusions: This work opens the way to a new field of modelling where complex interactions between water transport, carbohydrate allocation and physiological functions can be simulated at the organ level and describe functioning and behaviour at the tree scale. 
Keyword Carbon allocation
Functionalstructural plant modelling
L-PEACH
Plant growth simulation
Water stress
Xylem
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Wed, 19 Nov 2014, 01:00:59 EST by Inigo Auzmendi on behalf of Centre for Plant Science