Continuous Light as a way to increase Greenhouse Tomato Production

A.I. Velez Ramirez, E. Heuvelink, W. van Ieperen, D. Vreugdenhil, F.F. Millenaar

Research output: Chapter in Book/Report/Conference proceedingConference paper

15 Citations (Scopus)


Tomato plants need six hours of darkness per day for optimal growth; therefore, photosynthesis does not take place for 25% of the day. If tomatoes could be grown under continuous light, a substantial increase in production is expected. In practice, however, continuous light-grown tomato plants develop a potentially lethal mottled chlorosis. Such continuous-light-induced injury is only poorly understood so far. Recently, we proposed a number of hypotheses that aim to explain the continuous-light-induced injury, and rediscovered that wild-tomato species were reported as continuous-light-tolerant. Here, we (i) present a simulation study which shows that if an ideal continuous-light-tolerant tomato genotype is used and no crop adaptations to continuous light are assumed, greenhouse tomato production could be 26% higher when using supplementary lighting for 24 h day-1 in comparison with using supplementary lighting only for 18 h day-1 during day time, and (ii) discuss expected changes in greenhouse energy budgets and alterations in crop physiological responses that might arise from cultivating tomatoes under continuous light.
Original languageEnglish
Title of host publicationProceedings of the VIIth International Symposium on Light in Horticultural Systems, Wageningen, The Netherlands, October 14-18, 2012
EditorsS. Hemming, E. Heuvelink
Place of PublicationLeuven
ISBN (Print)9789066055452
Publication statusPublished - 2012
EventVII International Symposium on Light in Horticultural Systems - Wageningen, Netherlands
Duration: 15 Oct 201218 Oct 2012


ConferenceVII International Symposium on Light in Horticultural Systems

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