Abstract
Although representing a small proportion of solar radiation, ultraviolet (UV) radiation (280–400 nm) has been shown to greatly affect growth, photomorphogenesis , and secondary metabolism in plants. Given the implications to crop physiology and nutritional quality , there is interest in understanding the effects of supplemental UVA and UVB radiation on the growth and phytonutrient content of nutrient-dense crops, like microgreens . We conducted a greenhouse study to evaluate the effect of supplemental UVA, UVB, and combined UVAB radiation on yield, mineral profiles, and antioxidant components of two varieties of pea ( Pisum sativum L.) microgreens: ‘Field Pea’ and ‘Dwarf Grey Sugar Pea.’ After full germination, pea shoots were exposed to sunlight for one day and then were exposed to supplemental treatments of UVA (1.83 W/m 2 ), UVB (0.61 W/m 2 ), or UVA (1.55 W/m 2 ) + UVB (0.61 W/m 2 ) radiation for 3-, 6-, or 12-h/day for 6 days. The supplementary UVA treatment significantly increased fresh yield and dry weight in pea microgreens, with 12-h of UVA having the highest yield. Conversely, exposure to supplementary UVB and UVAB produced a loss in yield with all exposure times above 3-h/day. Exposure to UVA radiation had no significant effect on total phenolic content (TPC) and total antioxidant activity (TAA), while the exposure to UVB and UVAB radiation showed a significant decrease of both TPC and TAA with exposure times above 3-h/day. UVB supplementary radiation reduced pea shoot mineral accumulation, while UVA positively influenced mineral content only in ‘Dwarf Grey Sugar Pea’. These results suggest that exposure to supplementary UVB radiation (0.61 W/m 2 ) for longer than 3-h/day, regardless of the exposure to UVA radiation, results in significant losses in yield and antioxidant synthesis in pea microgreens.
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Claims 9
Claim · model-written summary
Supplementary UVA significantly increased fresh yield and dry weight of pea microgreens.
- Taxon
- pea
Lathyrus oleraceuse1 - Treatment
- supplementary UVA treatmente0
- Outcome
- fresh yield and dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The supplementary UVA treatment significantly increased fresh yield and dry weight in pea microgreens”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Twelve-hour UVA produced the highest pea shoot yield.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- 12-h of UVAe0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with 12-h of UVA having the highest yield”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
UVB exposure above 3-h/day reduced pea shoot yield.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- supplementary UVBe0
- Outcome
- yielde0
- Direction
- losse0
- Qualifier
- above 3-h/daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to supplementary UVB and UVAB produced a loss in yield with all exposure times above 3-h/day”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Combined UVAB exposure above 3-h/day reduced pea shoot yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to supplementary UVB and UVAB produced a loss in yield with all exposure times above 3-h/day”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
UVA had no significant effect on total phenolic content and antioxidant activity.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- UVA radiatione0
- Outcome
- total phenolic content (TPC) and total antioxidant activity (TAA)e0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to UVA radiation had no significant effect on total phenolic content (TPC) and total antioxidant activity (TAA)”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
UVB above 3-h/day significantly decreased TPC and TAA.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- UVBe0
- Outcome
- TPC and TAAe0
- Direction
- decreasee0
- Qualifier
- above 3-h/daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to UVB and UVAB radiation showed a significant decrease of both TPC and TAA with exposure times above 3-h/day”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
UVAB above 3-h/day significantly decreased TPC and TAA.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- UVABe0
- Outcome
- TPC and TAAe0
- Direction
- decreasee0
- Qualifier
- above 3-h/daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to UVB and UVAB radiation showed a significant decrease of both TPC and TAA with exposure times above 3-h/day”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
Supplementary UVB reduced pea shoot mineral accumulation.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- UVB supplementary radiatione0
- Outcome
- pea shoot mineral accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UVB supplementary radiation reduced pea shoot mineral accumulation”
e1“pea ( Pisum sativum L.)”
Claim · model-written summary
UVA improved mineral content only in Dwarf Grey Sugar Pea.
- Taxon
- peaLathyrus oleraceuse1
- Material
- ‘Dwarf Grey Sugar Pea’e0
- Treatment
- UVAe0
- Outcome
- mineral contente0
- Direction
- positively influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UVA positively influenced mineral content only in ‘Dwarf Grey Sugar Pea’”
e1“pea ( Pisum sativum L.)”
The same questions in other papers
uv · yield · Lathyrus oleraceus (pea)Results differ
2 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
5 papers more in this group
See all 9 papers →uv · quality: phytochemicals · Lathyrus oleraceus (pea)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
radiation · nutrient: content · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- negative
uv · nutrient: content · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- 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.