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Evaluation of a sensor for online measurements of stem diameter variations of leafy vegetables

P Bleyaert, K Vermeulen, Kathy Steppe UGent and J Dekock (2012) Acta Horticulturae. In Acta Horticulturae 927. p.571-579
abstract
Continuous monitoring of leafy vegetables in greenhouses could be of great assistance to growers to obtain optimal plant growth with little or no basal rotting and no marginal necrosis or tipburn. However, continuous measurements of plant responses have remained mainly restricted to leaf temperature for monitoring purposes for leafy vegetables. Leaf temperature measurements can give some information about the plant transpiration rate, but direct information about the plant water status remains fairly limited, and no information at all is provided about the plant growth rate. The present contribution evaluated the use of a device which allowed online measurements of the diameter (SD) of the very short and hidden stem of butterhead lettuce (Lactuca sativa L. var. capitata). We were able to measure SD variations during the whole growing cycle in an automated way, with the exception of a short period just after transplantation. No significant sensor pressure effect on growth was observed, and the recorded SD variations showed a good correlation with manual measurements on the control plants. Moreover, we found a strong correlation between SD and plant fresh weight. However, the relationship SD versus fresh weight was season-dependent. Additionally, the sensor was able to reveal stem shrinkage due to drought stress, which means these measurements can provide instantaneous information on the actual plant water status.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
butterhead lettuce, Lactuca sativa L. var. capitata, phytomonitoring, plant growth, plant water status, WATER-STRESS, TREES, RESPONSES, GRAPEVINE, IMAGERY, TOMATO
in
Acta Horticulturae
Acta Hortic.
editor
N Castilla, O VanKooten, S Sase, JF Meneses, WH Schnitzler and E VanOS
series title
Acta Horticulturae
volume
927
issue title
XXVIII International Horticultural Congress on Science and Horticulture for People (IHC 2010) ; International symposium on Greenhouse and Soilless Cultivation
pages
571 - 579
publisher
International Society for Horticultural Science (ISHS)
place of publication
Leuven, Belgium
conference name
28th International Horticultural Congress on Science and Horticulture for People (IHC 2010) ; International symposium on Greenhouse and Soilless Cultivation
conference location
Lisbon, Portugal
conference start
2010-08-22
conference end
2010-08-27
Web of Science type
Proceedings Paper
Web of Science id
000304527500071
ISSN
0567-7572
ISBN
9789066057241
language
English
UGent publication?
yes
classification
P1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2915217
handle
http://hdl.handle.net/1854/LU-2915217
alternative location
http://www.actahort.org/books/927/927_70.htm
date created
2012-06-21 16:46:38
date last changed
2012-07-10 13:15:30
@inproceedings{2915217,
  abstract     = {Continuous monitoring of leafy vegetables in greenhouses could be of great assistance to growers to obtain optimal plant growth with little or no basal rotting and no marginal necrosis or tipburn. However, continuous measurements of plant responses have remained mainly restricted to leaf temperature for monitoring purposes for leafy vegetables. Leaf temperature measurements can give some information about the plant transpiration rate, but direct information about the plant water status remains fairly limited, and no information at all is provided about the plant growth rate. The present contribution evaluated the use of a device which allowed online measurements of the diameter (SD) of the very short and hidden stem of butterhead lettuce (Lactuca sativa L. var. capitata). We were able to measure SD variations during the whole growing cycle in an automated way, with the exception of a short period just after transplantation. No significant sensor pressure effect on growth was observed, and the recorded SD variations showed a good correlation with manual measurements on the control plants. Moreover, we found a strong correlation between SD and plant fresh weight. However, the relationship SD versus fresh weight was season-dependent. Additionally, the sensor was able to reveal stem shrinkage due to drought stress, which means these measurements can provide instantaneous information on the actual plant water status.},
  author       = {Bleyaert, P and Vermeulen, K and Steppe, Kathy and Dekock, J},
  booktitle    = {Acta Horticulturae},
  editor       = {Castilla, N and VanKooten, O and Sase, S and Meneses, JF and Schnitzler, WH and VanOS, E},
  isbn         = {9789066057241},
  issn         = {0567-7572},
  keyword      = {butterhead lettuce,Lactuca sativa L. var. capitata,phytomonitoring,plant growth,plant water status,WATER-STRESS,TREES,RESPONSES,GRAPEVINE,IMAGERY,TOMATO},
  language     = {eng},
  location     = {Lisbon, Portugal},
  pages        = {571--579},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {Evaluation of a sensor for online measurements of stem diameter variations of leafy vegetables},
  url          = {http://www.actahort.org/books/927/927\_70.htm},
  volume       = {927},
  year         = {2012},
}

Chicago
Bleyaert, P, K Vermeulen, Kathy Steppe, and J Dekock. 2012. “Evaluation of a Sensor for Online Measurements of Stem Diameter Variations of Leafy Vegetables.” In Acta Horticulturae, ed. N Castilla, O VanKooten, S Sase, JF Meneses, WH Schnitzler, and E VanOS, 927:571–579. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
Bleyaert, P., Vermeulen, K., Steppe, K., & Dekock, J. (2012). Evaluation of a sensor for online measurements of stem diameter variations of leafy vegetables. In N. Castilla, O. VanKooten, S. Sase, J. Meneses, W. Schnitzler, & E. VanOS (Eds.), Acta Horticulturae (Vol. 927, pp. 571–579). Presented at the 28th International Horticultural Congress on Science and Horticulture for People (IHC 2010) ; International symposium on Greenhouse and Soilless Cultivation, Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
Bleyaert P, Vermeulen K, Steppe K, Dekock J. Evaluation of a sensor for online measurements of stem diameter variations of leafy vegetables. In: Castilla N, VanKooten O, Sase S, Meneses J, Schnitzler W, VanOS E, editors. Acta Horticulturae. Leuven, Belgium: International Society for Horticultural Science (ISHS); 2012. p. 571–9.
MLA
Bleyaert, P, K Vermeulen, Kathy Steppe, et al. “Evaluation of a Sensor for Online Measurements of Stem Diameter Variations of Leafy Vegetables.” Acta Horticulturae. Ed. N Castilla et al. Vol. 927. Leuven, Belgium: International Society for Horticultural Science (ISHS), 2012. 571–579. Print.