Abstract
UV-A (315–400 nm) is a component of solar radiation, which impacts plant physiology. Consequently, the impact was investigated of UV-A supplementation on various aspects of kale cultivation in a plant factory with artificial lighting. Three UV-A intensity treatments (5, 10, or 15 W/m2) were applied to kale plants for 5 days before harvesting. The results revealed that 5 or 10 W/m2 UV-A supplementation provided significant advantages for kale growth. The fresh weight of the kale shoots increased by over 35–50% after UV-A exposure. In particular, the 10 W/m2 UV-A exposure significantly improved the photosynthetic rate, water-use efficiency, and quantum efficiency of photosystem II (Y(II)). In addition, the treatment with UV-A positively impacted changes in leaf spectral indices, resulting in decreases in the simple ratio index (SR), the normalized phaeophytinization index (NPQI), and the normalized difference red edge index (NDRE). Furthermore, the phytonutrients in kale (Vitamin C, soluble protein, and total phenolics) were enhanced using the 10 W/m2 UV-A treatment. One notable outcome was the consistent reduction in nitrate contents across all UV-A treatment intensities. Therefore, supplementing kale cultivation with UV-A radiation was a valuable strategy for enhancing kale yield and quality in plant factory production.
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Claims 7
Claim · model-written summary
UV-A at 5 or 10 W/m2 significantly benefited kale growth.
- Taxon
- kale
Brassica oleracea var. viridise0 - Treatment
- 5 or 10 W/m2 UV-A supplementatione0
- Outcome
- kale growthe0
- Direction
- advantagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 or 10 W/m2 UV-A supplementation provided significant advantages for kale growth”
Claim · model-written summary
UV-A increased kale shoot fresh weight by over 35–50%.
- Taxon
- kaleBrassica oleracea var. viridise0
- Treatment
- UV-A exposuree0
- Outcome
- fresh weight of the kale shootse0
- Direction
- increasede0
- Value
- over 35–50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fresh weight of the kale shoots increased by over 35–50% after UV-A exposure”
Claim · model-written summary
UV-A at 10 W/m2 significantly improved photosynthetic rate, water-use efficiency and PSII quantum efficiency.
- Taxon
- kaleBrassica oleracea var. viridist0
- Treatment
- 10 W/m2 UV-A exposuree0
- Outcome
- photosynthetic rate, water-use efficiency, and quantum efficiency of photosystem II (Y(II))e0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 10 W/m2 UV-A exposure significantly improved the photosynthetic rate, water-use efficiency, and quantum efficiency of photosystem II (Y(II))”
t0“Pre-Harvest UV-A Supplementation in Plant Factory with Artificial Lighting Improves Growth, Photosynthesis, and Phytonutrients in Kale”
Claim · model-written summary
UV-A decreased the SR, NPQI and NDRE leaf spectral indices.
- Taxon
- kaleBrassica oleracea var. viridist0
- Treatment
- UV-Ae0
- Outcome
- simple ratio index (SR), the normalized phaeophytinization index (NPQI), and the normalized difference red edge index (NDRE)e0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment with UV-A positively impacted changes in leaf spectral indices, resulting in decreases in the simple ratio index (SR), the normalized phaeophytinization index (NPQI), and the normalized difference red edge index (NDRE)”
t0“Pre-Harvest UV-A Supplementation in Plant Factory with Artificial Lighting Improves Growth, Photosynthesis, and Phytonutrients in Kale”
Claim · model-written summary
UV-A at 10 W/m2 enhanced vitamin C, soluble protein and total phenolics.
- Taxon
- kaleBrassica oleracea var. viridise0
- Treatment
- 10 W/m2 UV-A treatmente0
- Outcome
- Vitamin C, soluble protein, and total phenolicse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the phytonutrients in kale (Vitamin C, soluble protein, and total phenolics) were enhanced using the 10 W/m2 UV-A treatment”
Claim · model-written summary
All UV-A intensities reduced nitrate content.
- Taxon
- kaleBrassica oleracea var. viridist0
- Treatment
- UV-A treatment intensitiese0
- Outcome
- nitrate contentse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“consistent reduction in nitrate contents across all UV-A treatment intensities”
t0“Pre-Harvest UV-A Supplementation in Plant Factory with Artificial Lighting Improves Growth, Photosynthesis, and Phytonutrients in Kale”
Claim · model-written summary
The authors recommended UV-A supplementation to improve kale yield and quality in plant factories.
- Taxon
- kaleBrassica oleracea var. viridise0
- Outcome
- supplementing kale cultivation with UV-A radiatione0
- Setting
- plant factory productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementing kale cultivation with UV-A radiation was a valuable strategy for enhancing kale yield and quality in plant factory production”
The same questions in other papers
uv · growth · Brassica oleracea (wild cabbage)Results differ
9 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
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See all 17 papers →uv · physiology: photosynthesis · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- no effect
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- negative
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See all 6 papers →uv · physiology: osmolytes · Brassica oleracea (wild cabbage)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.