The responses of light interception, photosynthesis and fruit yield of cucumber to LED-lighting within the canopy

G. Trouwborst, J. Oosterkamp, S.W. Hogewoning, J. Harbinson, W. van Ieperen

Research output: Contribution to journalArticleAcademicpeer-review

109 Citations (Scopus)

Abstract

Mathematical models of light attenuation and canopy photosynthesis suggest that crop photosynthesis increases by more uniform vertical irradiance within crops. This would result when a larger proportion of total irradiance is applied within canopies (interlighting) instead of from above (top lighting). These irradiance profiles can be generated by Light Emitting Diodes (LEDs). We investigated the effects of interlighting with LEDs on light interception, on vertical gradients of leaf photosynthetic characteristics and on crop production and development of a greenhouse-grown Cucumis sativus'Samona' crop and analysed the interaction between them. Plants were grown in a greenhouse under low natural irradiance (winter) with supplemental irradiance of 221 micromol photosynthetic photon flux m(-2) s(-1) (20 h per day). In the interlighting treatment, LEDs (80% Red, 20% Blue) supplied 38% of the supplemental irradiance within the canopy with 62% as top lighting by High-Pressure Sodium (HPS)-lamps. The control was 100% top lighting (HPS lamps). We measured horizontal and vertical light extinction as well as leaf photosynthetic characteristics at different leaf layers, and determined total plant production. Leaf mass per area and dry mass allocation to leaves were significantly greater but leaf appearance rate and plant length were smaller in the interlighting treatment. Although leaf photosynthetic characteristics were significantly increased in the lower leaf layers, interlighting did not increase total biomass or fruit production, partly because of a significantly reduced vertical and horizontal light interception caused by extreme leaf curling, likely because of the LED-light spectrum used, and partly because of the relatively low irradiances from above
LanguageEnglish
Pages289-300
JournalPhysiologia Plantarum
Volume138
Issue number3
DOIs
Publication statusPublished - 2010

Fingerprint

Cucumis sativus
Photosynthesis
Lighting
fruit yield
cucumbers
lighting
Fruit
photosynthesis
canopy
Light
leaves
crops
Sodium
sodium
greenhouses
Pressure
leaf curling
fruit growing
Photons
Biomass

Keywords

  • chlorophyll fluorescence
  • alocasia-macrorrhiza
  • chenopodium-album
  • active radiation
  • leaf movements
  • leaves
  • plants
  • sun
  • photoinhibition
  • acclimation

Cite this

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title = "The responses of light interception, photosynthesis and fruit yield of cucumber to LED-lighting within the canopy",
abstract = "Mathematical models of light attenuation and canopy photosynthesis suggest that crop photosynthesis increases by more uniform vertical irradiance within crops. This would result when a larger proportion of total irradiance is applied within canopies (interlighting) instead of from above (top lighting). These irradiance profiles can be generated by Light Emitting Diodes (LEDs). We investigated the effects of interlighting with LEDs on light interception, on vertical gradients of leaf photosynthetic characteristics and on crop production and development of a greenhouse-grown Cucumis sativus'Samona' crop and analysed the interaction between them. Plants were grown in a greenhouse under low natural irradiance (winter) with supplemental irradiance of 221 micromol photosynthetic photon flux m(-2) s(-1) (20 h per day). In the interlighting treatment, LEDs (80{\%} Red, 20{\%} Blue) supplied 38{\%} of the supplemental irradiance within the canopy with 62{\%} as top lighting by High-Pressure Sodium (HPS)-lamps. The control was 100{\%} top lighting (HPS lamps). We measured horizontal and vertical light extinction as well as leaf photosynthetic characteristics at different leaf layers, and determined total plant production. Leaf mass per area and dry mass allocation to leaves were significantly greater but leaf appearance rate and plant length were smaller in the interlighting treatment. Although leaf photosynthetic characteristics were significantly increased in the lower leaf layers, interlighting did not increase total biomass or fruit production, partly because of a significantly reduced vertical and horizontal light interception caused by extreme leaf curling, likely because of the LED-light spectrum used, and partly because of the relatively low irradiances from above",
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The responses of light interception, photosynthesis and fruit yield of cucumber to LED-lighting within the canopy. / Trouwborst, G.; Oosterkamp, J.; Hogewoning, S.W.; Harbinson, J.; van Ieperen, W.

In: Physiologia Plantarum, Vol. 138, No. 3, 2010, p. 289-300.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - The responses of light interception, photosynthesis and fruit yield of cucumber to LED-lighting within the canopy

AU - Trouwborst, G.

AU - Oosterkamp, J.

AU - Hogewoning, S.W.

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KW - active radiation

KW - leaf movements

KW - leaves

KW - plants

KW - sun

KW - photoinhibition

KW - acclimation

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T2 - Physiologia Plantarum

JF - Physiologia Plantarum

SN - 0031-9317

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