Individual leaf development in Arabidopsis thaliana: a stable thermal-time-based programme

Granier, Christine, Massonnet, Catherine, Turc, Olivier, Muller, Bertrand, Chenu, Karine and Tardieu, Francois (2002) Individual leaf development in Arabidopsis thaliana: a stable thermal-time-based programme. Annals of Botany, 89 5: 595-604. doi:10.1093/aob/mcf085


Author Granier, Christine
Massonnet, Catherine
Turc, Olivier
Muller, Bertrand
Chenu, Karine
Tardieu, Francois
Title Individual leaf development in Arabidopsis thaliana: a stable thermal-time-based programme
Journal name Annals of Botany   Check publisher's open access policy
ISSN 0305-7364
1095-8290
Publication date 2002-05
Sub-type Article (original research)
DOI 10.1093/aob/mcf085
Volume 89
Issue 5
Start page 595
End page 604
Total pages 10
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Language eng
Abstract In crop species, the impact of temperature on plant development is classically modelled using thermal time. We examined whether this method could be used in a non-crop species, Arabidopsis thaliana, to analyse the response to temperature of leaf initiation rate and of the development of two leaves of the rosette. The results confirmed the large plant-to-plant variability in the studied isogenic line of the Columbia ecotype: 100-fold differences in leaf area among plants sown on the same date were commonly observed at a given date. These differences disappeared in mature leaves, suggesting that they were due to a variability in plant developmental stage. The whole population could therefore be represented by any group of synchronous plants labelled at the two-leaf stage and followed during their development. Leaf initiation rate, duration of leaf expansion and maximal relative leaf expansion rate varied considerably among experiments performed at different temperatures (from 6 to 26°C) but they were linearly related to temperature in the range 6-26°C, with a common x-intercept of 3°C. Expressing time in thermal time with a threshold temperature of 3°C unified the time courses of leaf initiation and of individual leaf development for plants grown at different temperatures and experimental conditions. The two leaves studied (leaf 2 and leaf 6) had a two-phase development, with an exponential phase followed by a phase with decreasing relative elongation rate. Both phases had constant durations for a given leaf position if expressed in thermal time. Changes in temperature caused changes in both the rate of development and in the expansion rate which mutually compensated such that they had no consequence on leaf area at a given thermal time. The resulting model of leaf development was applied to ten experiments carried out in a glasshouse or in a growth chamber, with plants grown in soil or hydroponically. Because it predicts accurately the stage of development and the relative expansion rate of any leaf of the rosette, this model facilitates precise planning of sampling procedures and the comparison of treatments in growth analyses.
Keyword Arabidopsis thaliana
Thermal time
Leaf initiation
Leaf expansion
Model
Temperature
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Mon, 07 Mar 2011, 14:49:58 EST