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Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress

Kristof Vermeulen UGent, Kathy Steppe UGent, Nguyen Sy Linh, Lieven De Backer, Peter Bleyaert, Jan Dekock, Jean-Marie Aerts, Daniël Berckmans and Raoul Lemeur UGent (2008) ACTA HORTICULTURAE. 801. p.1259-1265
abstract
One of the many opportunities of direct crop monitoring is the ability to detect suboptimal growth conditions in a very early stage, so that both productivity and quality can still be guaranteed. In this study, eight tomato plants (Lycopersicon esculentum Mill. 'Clothilde') were hydroponically grown in order to modulate the root zone. Four of these plants were subjected to drought stress by adding 200 g/L poly-ethylene glycol 6000 to the nutrient solution. This treatment immediately resulted in a considerable reduction in sap flow rate, thereby forcing the plants to use their internal water storage to support transpiration. Consequently, a stem diameter shrinkage of 0.1 mm was measured before visual symptoms of turgidity loss were observed. At leaf level, the leaf temperature increased to a level above the predicted leaf temperature, which indicated that the stomata were gradually closing. Measurements of stomatal resistance confirmed this hypothesis. The lack of transpiration and, hence, the ceased cooling of the leaves during the treatment caused permanent damage to the leaves, which was also confirmed by a permanent reduction in sap flow rate. In conclusion, stem diameter, sap flow rate and leaf temperature measurements detected drought stress before visual symptoms were observed, so they can be implemented in an early-warning system. A combination of these plant responses gives a good overall picture of the water status of a tomato plant.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (proceedingsPaper)
publication status
published
subject
keyword
crop monitoring, GREENHOUSE CROPS, speaking plant, climate control, early-warning, WATER, PITFALLS
in
ACTA HORTICULTURAE
Acta Hortic.
editor
S De Pascale, G Scarascia Mugnozza, A Maggio and E Schettini
volume
801
issue title
Proceedings of the international symposium on high technology for greenhouse system management, vols 1 and 2
pages
1259 - 1265
publisher
International Society for Horticultural Science (ISHS)
place of publication
Leuven, Belgium
conference name
International symposium on High Technology for Greenhouse System Management (Greensys 2007)
conference location
Naples, Italy
conference start
2007-10-04
conference end
2007-10-06
Web of Science type
proceedings paper
Web of Science id
000263190000154
ISSN
0567-7572
ISBN
9789066056213
language
English
UGent publication?
yes
classification
P1
copyright statement
I have transferred the copyright for this publication to the publisher
id
497307
handle
http://hdl.handle.net/1854/LU-497307
alternative location
http://www.actahort.org/books/801/801_154.htm
date created
2009-02-18 11:14:11
date last changed
2011-05-10 09:24:36
@inproceedings{497307,
  abstract     = {One of the many opportunities of direct crop monitoring is the ability to detect suboptimal growth conditions in a very early stage, so that both productivity and quality can still be guaranteed. In this study, eight tomato plants (Lycopersicon esculentum Mill. 'Clothilde') were hydroponically grown in order to modulate the root zone. Four of these plants were subjected to drought stress by adding 200 g/L poly-ethylene glycol 6000 to the nutrient solution. This treatment immediately resulted in a considerable reduction in sap flow rate, thereby forcing the plants to use their internal water storage to support transpiration. Consequently, a stem diameter shrinkage of 0.1 mm was measured before visual symptoms of turgidity loss were observed. At leaf level, the leaf temperature increased to a level above the predicted leaf temperature, which indicated that the stomata were gradually closing. Measurements of stomatal resistance confirmed this hypothesis. The lack of transpiration and, hence, the ceased cooling of the leaves during the treatment caused permanent damage to the leaves, which was also confirmed by a permanent reduction in sap flow rate. In conclusion, stem diameter, sap flow rate and leaf temperature measurements detected drought stress before visual symptoms were observed, so they can be implemented in an early-warning system. A combination of these plant responses gives a good overall picture of the water status of a tomato plant.},
  author       = {Vermeulen, Kristof and Steppe, Kathy and Linh, Nguyen Sy and De Backer, Lieven and Bleyaert, Peter and Dekock, Jan and Aerts, Jean-Marie and Berckmans, Dani{\"e}l and Lemeur, Raoul},
  booktitle    = {ACTA HORTICULTURAE},
  editor       = {De Pascale, S and Scarascia Mugnozza, G and Maggio, A and Schettini, E},
  isbn         = {9789066056213},
  issn         = {0567-7572},
  keyword      = {crop monitoring,GREENHOUSE CROPS,speaking plant,climate control,early-warning,WATER,PITFALLS},
  language     = {eng},
  location     = {Naples, Italy},
  pages        = {1259--1265},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress},
  url          = {http://www.actahort.org/books/801/801\_154.htm},
  volume       = {801},
  year         = {2008},
}

Chicago
Vermeulen, Kristof, Kathy Steppe, Nguyen Sy Linh, Lieven De Backer, Peter Bleyaert, Jan Dekock, Jean-Marie Aerts, Daniël Berckmans, and Raoul Lemeur. 2008. “Simultaneous Response of Stem Diameter, Sap Flow Rate and Leaf Temperature of Tomato Plants to Drought Stress.” In Acta Horticulturae, ed. S De Pascale, G Scarascia Mugnozza, A Maggio, and E Schettini, 801:1259–1265. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
Vermeulen, K., Steppe, K., Linh, N. S., De Backer, L., Bleyaert, P., Dekock, J., Aerts, J.-M., et al. (2008). Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress. In S. De Pascale, G. Scarascia Mugnozza, A. Maggio, & E. Schettini (Eds.), ACTA HORTICULTURAE (Vol. 801, pp. 1259–1265). Presented at the International symposium on High Technology for Greenhouse System Management (Greensys 2007), Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
Vermeulen K, Steppe K, Linh NS, De Backer L, Bleyaert P, Dekock J, et al. Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress. In: De Pascale S, Scarascia Mugnozza G, Maggio A, Schettini E, editors. ACTA HORTICULTURAE. Leuven, Belgium: International Society for Horticultural Science (ISHS); 2008. p. 1259–65.
MLA
Vermeulen, Kristof, Kathy Steppe, Nguyen Sy Linh, et al. “Simultaneous Response of Stem Diameter, Sap Flow Rate and Leaf Temperature of Tomato Plants to Drought Stress.” Acta Horticulturae. Ed. S De Pascale et al. Vol. 801. Leuven, Belgium: International Society for Horticultural Science (ISHS), 2008. 1259–1265. Print.