Details
| Original language | English |
|---|---|
| Pages (from-to) | 697-708 |
| Number of pages | 12 |
| Journal | New Phytologist |
| Volume | 190 |
| Issue number | 3 |
| Publication status | Published - 18 Apr 2011 |
Abstract
Growing glasshouse plant canopies are exposed to natural fluctuations in light quantity, and the dynamically changing canopy architecture induces local variations in light quality. This modelling study aimed to analyse the importance of both light signals for an accurate prediction of individual internode lengths. We conceptualized two model approaches for estimating final internode lengths (FILs). The first one is only photosynthetically active radiation (PAR)-sensitive and ignores canopy architecture, whereas the second approach uses a functional-structural growth model for considering variations in both PAR and red:far-red (R:FR) ratio (L-Cucumber). Internode lengths measured in three experiments were used for model parameterization and evaluation. The overall trends for the simulated FILs using the exclusively PAR-sensitive model approach were already in line with the measured FILs, but they underestimated FILs at higher ranks. L-Cucumber provided considerably better FIL predictions under various light conditions and canopy architectures. Both light signals are needed for an accurate estimation of the FILs, and only L-Cucumber is able to consider R:FR signals from the growing canopy. Yet this study highlights the significance of the PAR signal for predicting FILs as neighbour effects increase, which indicates a potential role of photosynthate signalling in internode elongation.
Keywords
- Canopy, Cucumis sativus (cucumber), Functional-structural plant model, Internode, L-system, Photosynthetically active radiation, Plant architecture, Red:far-red (R:FR) ratio
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Physiology
- Agricultural and Biological Sciences(all)
- Plant Science
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In: New Phytologist, Vol. 190, No. 3, 18.04.2011, p. 697-708.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modelling photo-modulated internode elongation in growing glasshouse cucumber canopies
AU - Kahlen, Katrin
AU - Stützel, Hartmut
PY - 2011/4/18
Y1 - 2011/4/18
N2 - Growing glasshouse plant canopies are exposed to natural fluctuations in light quantity, and the dynamically changing canopy architecture induces local variations in light quality. This modelling study aimed to analyse the importance of both light signals for an accurate prediction of individual internode lengths. We conceptualized two model approaches for estimating final internode lengths (FILs). The first one is only photosynthetically active radiation (PAR)-sensitive and ignores canopy architecture, whereas the second approach uses a functional-structural growth model for considering variations in both PAR and red:far-red (R:FR) ratio (L-Cucumber). Internode lengths measured in three experiments were used for model parameterization and evaluation. The overall trends for the simulated FILs using the exclusively PAR-sensitive model approach were already in line with the measured FILs, but they underestimated FILs at higher ranks. L-Cucumber provided considerably better FIL predictions under various light conditions and canopy architectures. Both light signals are needed for an accurate estimation of the FILs, and only L-Cucumber is able to consider R:FR signals from the growing canopy. Yet this study highlights the significance of the PAR signal for predicting FILs as neighbour effects increase, which indicates a potential role of photosynthate signalling in internode elongation.
AB - Growing glasshouse plant canopies are exposed to natural fluctuations in light quantity, and the dynamically changing canopy architecture induces local variations in light quality. This modelling study aimed to analyse the importance of both light signals for an accurate prediction of individual internode lengths. We conceptualized two model approaches for estimating final internode lengths (FILs). The first one is only photosynthetically active radiation (PAR)-sensitive and ignores canopy architecture, whereas the second approach uses a functional-structural growth model for considering variations in both PAR and red:far-red (R:FR) ratio (L-Cucumber). Internode lengths measured in three experiments were used for model parameterization and evaluation. The overall trends for the simulated FILs using the exclusively PAR-sensitive model approach were already in line with the measured FILs, but they underestimated FILs at higher ranks. L-Cucumber provided considerably better FIL predictions under various light conditions and canopy architectures. Both light signals are needed for an accurate estimation of the FILs, and only L-Cucumber is able to consider R:FR signals from the growing canopy. Yet this study highlights the significance of the PAR signal for predicting FILs as neighbour effects increase, which indicates a potential role of photosynthate signalling in internode elongation.
KW - Canopy
KW - Cucumis sativus (cucumber)
KW - Functional-structural plant model
KW - Internode
KW - L-system
KW - Photosynthetically active radiation
KW - Plant architecture
KW - Red:far-red (R:FR) ratio
UR - http://www.scopus.com/inward/record.url?scp=79954765317&partnerID=8YFLogxK
U2 - 10.1111/j.1469-8137.2010.03617.x
DO - 10.1111/j.1469-8137.2010.03617.x
M3 - Article
C2 - 21251000
AN - SCOPUS:79954765317
VL - 190
SP - 697
EP - 708
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 3
ER -