Abstract
Phenolic compounds in basil (Ocimum basilicum) plants grown under a controlled environment are reduced due to the absence of ultraviolet (UV) radiation and low photosynthetic photon flux density (PPFD). To characterize the optimal UV-B radiation dose and PPFD for enhancing the synthesis of phenolic compounds in basil plants without yield reduction, green and purple basil plants grown at two PPFDs, 160 and 224 μmol·m−2·s−1, were treated with five UV-B radiation doses including control, 1 h·d−1 for 2 days, 2 h·d−1 for 2 days, 1 h·d−1 for 5 days, and 2 h·d−1 for 5 days. Supplemental UV-B radiation suppressed plant growth and resulted in reduced plant yield, while high PPFD increased plant yield. Shoot fresh weight in green and purple basil plants was 12%–51% and 6%–44% lower, respectively, after UV-B treatments compared to control. Concentrations of anthocyanin, phenolics, and flavonoids in green basil leaves increased under all UV-B treatments by 9%–18%, 28%–126%, and 80%–169%, respectively, and the increase was greater under low PPFD compared to high PPFD. In purple basil plants, concentrations of phenolics and flavonoids increased after 2 h·d−1 UV-B treatments. Among all treatments, 1 h·d−1 for 2 days UV-B radiation under PPFD of 224 μmol·m−2·s−1 was the optimal condition for green basil production under a controlled environment.
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Claims 11
Claim · model-written summary
Supplemental UV-B suppressed basil growth.
- Taxon
- Basil
Ocimum basilicumt0 - Treatment
- Supplemental UV-B radiatione0
- Outcome
- plant growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplemental UV-B radiation suppressed plant growth”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
Supplemental UV-B reduced basil yield.
- Taxon
- BasilOcimum basilicumt0
- Treatment
- Supplemental UV-B radiatione0
- Outcome
- plant yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplemental UV-B radiation suppressed plant growth and resulted in reduced plant yield”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
Higher PPFD increased basil yield.
- Taxon
- BasilOcimum basilicumt0
- Treatment
- high PPFDe0
- Outcome
- plant yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high PPFD increased plant yield”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
UV-B reduced green basil shoot fresh weight by 12%–51% versus control.
- Taxon
- BasilOcimum basilicumt0
- Material
- greene0
- Treatment
- UV-B treatmentse0
- Outcome
- Shoot fresh weighte0
- Direction
- lowere0
- Value
- 12%–51%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot fresh weight in green and purple basil plants was 12%–51% and 6%–44% lower, respectively, after UV-B treatments compared to control”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
UV-B reduced purple basil shoot fresh weight by 6%–44% versus control.
- Taxon
- BasilOcimum basilicumt0
- Material
- purplee0
- Treatment
- UV-B treatmentse0
- Outcome
- Shoot fresh weighte0
- Direction
- lowere0
- Value
- 6%–44%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot fresh weight in green and purple basil plants was 12%–51% and 6%–44% lower, respectively, after UV-B treatments compared to control”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
All UV-B treatments increased green basil leaf anthocyanin concentration by 9%–18%.
- Taxon
- BasilOcimum basilicumt0
- Material
- greene0
- Organ / stage
- leavese0
- Treatment
- all UV-B treatmentse0
- Outcome
- anthocyanine0
- Direction
- increasede0
- Value
- 9%–18%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations of anthocyanin, phenolics, and flavonoids in green basil leaves increased under all UV-B treatments by 9%–18%, 28%–126%, and 80%–169%, respectively”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
All UV-B treatments increased green basil leaf phenolics by 28%–126%.
- Taxon
- BasilOcimum basilicumt0
- Material
- greene0
- Organ / stage
- leavese0
- Treatment
- all UV-B treatmentse0
- Outcome
- phenolicse0
- Direction
- increasede0
- Value
- 28%–126%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations of anthocyanin, phenolics, and flavonoids in green basil leaves increased under all UV-B treatments by 9%–18%, 28%–126%, and 80%–169%, respectively”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
All UV-B treatments increased green basil leaf flavonoids by 80%–169%.
- Taxon
- BasilOcimum basilicumt0
- Material
- greene0
- Organ / stage
- leavese0
- Treatment
- all UV-B treatmentse0
- Outcome
- flavonoidse0
- Direction
- increasede0
- Value
- 80%–169%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations of anthocyanin, phenolics, and flavonoids in green basil leaves increased under all UV-B treatments by 9%–18%, 28%–126%, and 80%–169%, respectively”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
The metabolite increases in green basil were greater at low than high PPFD.
- Taxon
- BasilOcimum basilicumt0
- Treatment
- low PPFDe0
- Outcome
- increasee0
- Direction
- greatere0
- Comparator
- high PPFDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase was greater under low PPFD compared to high PPFD”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
Two-hour daily UV-B increased phenolics and flavonoids in purple basil.
- Taxon
- BasilOcimum basilicumt0
- Material
- purplee0
- Treatment
- 2 h·d−1 UV-B treatmentse0
- Outcome
- phenolics and flavonoidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In purple basil plants, concentrations of phenolics and flavonoids increased after 2 h·d−1 UV-B treatments”
t0“Basil (Ocimum basilicum) Plants”
Claim · model-written summary
The authors identified 1 h·d−1 for 2 days UV-B at PPFD 224 μmol·m−2·s−1 as optimal for controlled-environment green basil production.
- Taxon
- BasilOcimum basilicumt0
- Treatment
- 1 h·d−1 for 2 days UV-B radiation under PPFD of 224 μmol·m−2·s−1e0
- Outcome
- optimal condition for green basil productione0
- Setting
- controlled environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1 h·d−1 for 2 days UV-B radiation under PPFD of 224 μmol·m−2·s−1 was the optimal condition for green basil production under a controlled environment”
t0“Basil (Ocimum basilicum) Plants”
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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.