Abstract
Controlled-environment crop production often weakens plants' defense mechanisms, reducing the accumulation of protective phytochemicals essential to human health. Our previous studies demonstrated that short-term supplementation of low-dose ultraviolet (UV) light to the red-green-blue (RGB) spectrum effectively boosts secondary metabolite (SM) synthesis and antioxidant capacity in lettuce. This study explored whether similar effects occur in basil cultivars by supplementing the RGB spectrum with ultraviolet B (UV-B, 311 nm) or ultraviolet C (UV-C, 254 nm) light shortly before harvest. Molecular analyses focused on UV-induced polyphenol synthesis, particularly chalcone synthase (CHS) level, and UV light perception via the UVR8 receptor. The impact of high-energy UV radiation on the photosynthetic apparatus (PA) was also monitored. The results showed that UV-B supplementation did not harm the PA, while UV-C significantly impaired photosynthesis and restricted plant growth and biomass accumulation. In green-leaf (Sweet Large, SL) basil, UV-B enhanced total antioxidant capacity (TAC), increasing polyphenolic secondary metabolites and ascorbic acid (AsA) levels. UV-C also stimulated phenolic compound accumulation in SL basil but had no positive effects in the purple-leaf (Dark Opal, DO) cultivar. Interestingly, while the UV-B treatment promoted UVR8 monomerization in both cultivars, the enhanced CHS level and concomitant SM synthesis were noted only for SL basil. In addition, UV-C also induced CHS activity and SM synthesis in SL basil but clearly in a UVR8-independeted manner. These findings underscore the potential of UV light supplementation for enhancing plant functional properties, highlighting species- and cultivar-specific effects without compromising photosynthetic performance.
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Claims 10
Claim · model-written summary
UV-B supplementation did not harm the photosynthetic apparatus of basil.
- Taxon
- basil
Ocimum basilicume0 - Treatment
- ultraviolet B (UV-B, 311 nm)e0
- Outcome
- PAe1
- Direction
- did not harme1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study explored whether similar effects occur in basil cultivars by supplementing the RGB spectrum with ultraviolet B (UV-B, 311 nm) or ultraviolet C (UV-C, 254 nm) light shortly before harvest”
e1“The results showed that UV-B supplementation did not harm the PA, while UV-C significantly impaired photosynthesis and restricted plant growth and biomass accumulation”
Claim · model-written summary
UV-C significantly impaired photosynthesis in basil.
- Taxon
- basilOcimum basilicume0
- Treatment
- UV-Ce1
- Outcome
- photosynthesise1
- Direction
- significantly impairede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study explored whether similar effects occur in basil cultivars by supplementing the RGB spectrum with ultraviolet B (UV-B, 311 nm) or ultraviolet C (UV-C, 254 nm) light shortly before harvest”
e1“The results showed that UV-B supplementation did not harm the PA, while UV-C significantly impaired photosynthesis and restricted plant growth and biomass accumulation”
Claim · model-written summary
UV-C restricted plant growth and biomass accumulation in basil.
- Taxon
- basilOcimum basilicume0
- Treatment
- ultraviolet C (UV-C, 254 nm)e0
- Outcome
- plant growth and biomass accumulatione1
- Direction
- restrictede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study explored whether similar effects occur in basil cultivars by supplementing the RGB spectrum with ultraviolet B (UV-B, 311 nm) or ultraviolet C (UV-C, 254 nm) light shortly before harvest”
e1“The results showed that UV-B supplementation did not harm the PA, while UV-C significantly impaired photosynthesis and restricted plant growth and biomass accumulation”
Claim · model-written summary
UV-B enhanced total antioxidant capacity (TAC) in green-leaf Sweet Large (SL) basil.
- Taxon
- basilOcimum basilicume2
- Material
- Sweet Large, SLe2
- Treatment
- UV-Be2
- Outcome
- total antioxidant capacity (TAC)e2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In green-leaf (Sweet Large, SL) basil, UV-B enhanced total antioxidant capacity (TAC), increasing polyphenolic secondary metabolites and ascorbic acid (AsA) levels”
Claim · model-written summary
UV-B increased polyphenolic secondary metabolites and ascorbic acid levels in SL basil.
- Taxon
- basilOcimum basilicume2
- Material
- Sweet Large, SLe2
- Treatment
- UV-Be2
- Outcome
- polyphenolic secondary metabolites and ascorbic acid (AsA) levelse2
- Direction
- increasinge2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In green-leaf (Sweet Large, SL) basil, UV-B enhanced total antioxidant capacity (TAC), increasing polyphenolic secondary metabolites and ascorbic acid (AsA) levels”
Claim · model-written summary
UV-C stimulated phenolic compound accumulation in SL basil.
- Taxon
- basilOcimum basilicume3
- Material
- SLe3
- Treatment
- UV-Ce3
- Outcome
- phenolic compound accumulatione3
- Direction
- stimulatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“UV-C also stimulated phenolic compound accumulation in SL basil but had no positive effects in the purple-leaf (Dark Opal, DO) cultivar”
Claim · model-written summary
UV-C had no positive effect on phenolic compound accumulation in Dark Opal (DO) basil.
- Taxon
- basilOcimum basilicume3
- Material
- Dark Opal, DOe3
- Treatment
- UV-Ce3
- Outcome
- phenolic compound accumulatione3
- Direction
- had no positive effectse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“UV-C also stimulated phenolic compound accumulation in SL basil but had no positive effects in the purple-leaf (Dark Opal, DO) cultivar”
Claim · model-written summary
UV-B promoted UVR8 monomerization in both basil cultivars.
- Taxon
- basilOcimum basilicume4
- Material
- both cultivarse4
- Treatment
- UV-B treatmente4
- Outcome
- UVR8 monomerizatione4
- Direction
- promotede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“while the UV-B treatment promoted UVR8 monomerization in both cultivars, the enhanced CHS level and concomitant SM synthesis were noted only for SL basil”
Claim · model-written summary
UV-B enhanced CHS level and secondary metabolite synthesis in SL basil only.
- Taxon
- basilOcimum basilicume4
- Material
- SL basile4
- Treatment
- UV-B treatmente4
- Gene
- CHSe4
- Outcome
- CHS level and concomitant SM synthesise4
- Direction
- enhancede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“while the UV-B treatment promoted UVR8 monomerization in both cultivars, the enhanced CHS level and concomitant SM synthesis were noted only for SL basil”
Claim · model-written summary
UV-C induced CHS activity and secondary metabolite synthesis in SL basil in a UVR8-independent manner.
- Taxon
- basilOcimum basilicume5
- Material
- SL basile5
- Treatment
- UV-Ce5
- Gene
- CHSe5
- Outcome
- CHS activity and SM synthesise5
- Direction
- inducede5
- Qualifier
- UVR8-independeted mannere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In addition, UV-C also induced CHS activity and SM synthesis in SL basil but clearly in a UVR8-independeted manner”
The same questions in other papers
uv · growth · Ocimum basilicum (basil)Results differ
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- positive
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See all 14 papers →uv · physiology: photosynthesis · Ocimum basilicum (basil)Results agree
2 papers in the same direction as this paper
- negative
- negative
uv · quality: phytochemicals · Ocimum basilicum (basil)Results agree
10 papers in the same direction as this paper
- positive
- positive
- positive
7 papers more in this group
See all 11 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.