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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 universitet, Handelshögskolan vid Örebro Universitet.
Örebro universitet, Institutionen för naturvetenskap och teknik. (Biokemi)
Vise andre og tillknytning
2020 (engelsk)Inngår i: Scientia Horticulturae, ISSN 0304-4238, E-ISSN 1879-1018, Vol. 263, artikkel-id 109110Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Elsevier, 2020. Vol. 263, artikkel-id 109110
HSV kategori
Forskningsprogram
Biokemi
Identifikatorer
URN: urn:nbn:se:oru:diva-78473DOI: 10.1016/j.scienta.2019.109110OAI: oai:DiVA.org:oru-78473DiVA, id: diva2:1375710
Forskningsfinansiär
Knowledge Foundation, 20130164Swedish Research Council Formas, 942-2015-516Tilgjengelig fra: 2019-12-05 Laget: 2019-12-05 Sist oppdatert: 2020-01-15bibliografisk kontrollert

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