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UV-A light induces a robust and dwarfed phenotype in cucumber plants (Cucumis sativus L.) without affecting fruit yield
Örebro Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden. (Biokemi)
Section of Crop Sciences, Department of Plant and Environmental Sciences, University of Copenhagen, Taastrup, Sweden.
Örebro University, Örebro University School of Business.
Örebro University, School of Science and Technology. (Biokemi)
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2020 (English)In: Scientia Horticulturae, ISSN 0304-4238, E-ISSN 1879-1018, Vol. 263, article id 109110Article in journal (Refereed) Published
Abstract [en]

Solar ultraviolet (UV) light influences plant growth and metabolism. Whereas high doses of UV can be deleterious for plants, natural UV doses are important for morphogenesis in many plants species, including those used in horticulture. Greenhouses are widely used for horticultural production and common cladding materials strongly absorb UV. Thus, low amounts of UV may be limiting the optimal development in some plant species. Light supplementation using UV tubes can overcome UV deficiency. Here we study cucumber seedling production in the absence or presence of different UV wavelengths. UV-A- (315-400 nm) and UV-B- (280-315 nm) enriched light was used for exposure and parameters such as the maximum quantum yield of photosystem II, stem development (internode length and diameter, stem dry weight, stem weight per unit of stem length, and stem bending), root biomass, leaf biomass and specific leaf mass were measured. We found that UV-A supplementation resulted in shorter more compact and sturdy plants, properties that are positive from a horticultural perspective. In contrast, UV-B-enriched light led to even smaller plants that lacked the sturdy phenotype. There were no signs of decreased Fv/Fmunder any of the treatments, nor statistically significant differences in fruit yield between the control plants and the UV-treated plants when grown to harvest. In particular, the differences in fruit yield between the controls and the UV-A-treated plants were negligible in all cases. Thus, supplementary UV-A light can be an interesting alternative to chemical growth regulators for production of sturdy horticultural plants.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 263, article id 109110
Keywords [en]
Cucumber production, Fruit yield, Plant architecture, Plant morphology, Ultraviolet light
National Category
Plant Biotechnology Horticulture Botany Biochemistry and Molecular Biology
Research subject
Biochemistry
Identifiers
URN: urn:nbn:se:oru:diva-78473DOI: 10.1016/j.scienta.2019.109110ISI: 000508491600018Scopus ID: 2-s2.0-85076304828OAI: oai:DiVA.org:oru-78473DiVA, id: diva2:1375710
Funder
Knowledge Foundation, 20130164Swedish Research Council Formas, 942-2015-516
Note

Funding Agencies:

Faculty for Business, Science and Technology at Örebro University

Science Foundation Ireland S16/IA/4418

China Scholarship Council 201406320076

Available from: 2019-12-05 Created: 2019-12-05 Last updated: 2020-02-06Bibliographically approved

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Flygare, Ann-MarieKalbina, IrinaStrid, Åke

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Örebro University School of BusinessSchool of Science and Technology
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Plant BiotechnologyHorticultureBotanyBiochemistry and Molecular Biology

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