Abstract
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 stem. There were no signs of decreased Fv/Fm under 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.
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Claims 6
Claim · model-written summary
UV-A supplementation produced shorter, more compact and sturdy cucumber plants.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- UV-A supplementatione1
- Outcome
- more compact and sturdy plantse1
- Direction
- shortere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber plants (Cucumis sativus L.)”
e1“UV-A supplementation resulted in shorter more compact and sturdy plants, properties that are positive from a horticultural perspective”
Claim · model-written summary
UV-B-enriched light produced even smaller cucumber plants that lacked the sturdy stem.
- Taxon
- cucumberCucumis sativust0
- Treatment
- UV-B-enriched lighte2
- Outcome
- smaller plants that lacked the sturdy steme2
- Direction
- smallere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber plants (Cucumis sativus L.)”
e2“In contrast, UV-B-enriched light led to even smaller plants that lacked the sturdy stem”
Claim · model-written summary
No signs of decreased Fv/Fm were found under any of the UV treatments in cucumber.
- Taxon
- cucumberCucumis sativust0
- Treatment
- any of the treatmentse3
- Outcome
- Fv/Fme3
- Direction
- no signs of decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber plants (Cucumis sativus L.)”
e3“There were no signs of decreased Fv/Fm under any of the treatments”
Claim · model-written summary
UV-treated cucumber plants showed no statistically significant difference in fruit yield compared with control plants when grown to harvest.
- Taxon
- cucumberCucumis sativust0
- Treatment
- UV-treated plantse4
- Outcome
- fruit yielde4
- Direction
- nor statistically significant differencese4
- Comparator
- control plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber plants (Cucumis sativus L.)”
e4“nor statistically significant differences in fruit yield between the control plants and the UV-treated plants when grown to harvest”
Claim · model-written summary
Fruit yield differences between controls and UV-A-treated cucumber plants were negligible in all cases.
- Taxon
- cucumberCucumis sativust0
- Treatment
- UV-A-treated plantse5
- Outcome
- fruit yielde5
- Direction
- negligiblee5
- Comparator
- controlse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber plants (Cucumis sativus L.)”
e5“the differences in fruit yield between the controls and the UV-A-treated plants were negligible in all cases”
Claim · model-written summary
Supplementary UV-A light can be an alternative to chemical growth regulators for producing sturdy cucumber plants.
- Taxon
- cucumberCucumis sativust0
- Treatment
- supplementary UV-A lighte6
- Outcome
- production of sturdy horticultural plantse6
- Comparator
- chemical growth regulatorse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber plants (Cucumis sativus L.)”
e6“supplementary UV-A light can be an interesting alternative to chemical growth regulators for production of sturdy horticultural plants”
The same questions in other papers
uv · yield · Cucumis sativus (cucumber)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- negative
3 papers more in this group
See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.