Abstract
Lactuca sativa cv. Outredgeous was grown under either fluorescent lamps or light-emitting diodes (LEDs) to test the hypothesis that antioxidant potential could be regulated by light quality. Red leaf lettuce was grown at 300 μmol·m −2 ·s −1 of photosynthetically active radiation, 1200 μmol·mol −1 CO 2 , 23 °C, and an 18 h-light /6-h dark photoperiod in controlled-environment chambers. The LED treatments were selected to provide different amounts of red (640 nm), blue (440 nm), green (530 nm), and far-red (730 nm) light in the spectra. Total anthocyanin content and the oxygen radical absorbance capacity of the tissue were measured at harvest. The source of light had a dramatic effect on both plant growth and production of radioprotective compounds. LEDs resulted in 50% greater bioprotectant content per plant at the same light level over triphosphor fluorescent lamps. Blue LEDs (440 nm) appeared to regulate the metabolic pathways leading to increased concentration of bioprotective compounds in leaf tissue. LED lighting induced a number of effects on morphology that increased both accumulation of bioprotective compounds and total yield.
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Claims 3
Claim · model-written summary
LEDs yielded 50% more bioprotectant content per plant than fluorescent lamps.
- Taxon
- Lactuca sativa
Lactuca sativat0 - Treatment
- LEDse0
- Outcome
- bioprotectant content per plante0
- Direction
- greatere0
- Value
- 50%e0
- Comparator
- triphosphor fluorescent lampse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LEDs resulted in 50% greater bioprotectant content per plant at the same light level over triphosphor fluorescent lamps”
t0“Lactuca sativa cv. Outredgeous”
Claim · model-written summary
Blue LEDs appeared to increase leaf bioprotective compound concentration through metabolic regulation.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- Blue LEDs (440 nm)e0
- Outcome
- concentration of bioprotective compoundse0
- Qualifier
- metabolic pathwayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Blue LEDs (440 nm) appeared to regulate the metabolic pathways leading to increased concentration of bioprotective compounds in leaf tissue”
t0“Lactuca sativa cv. Outredgeous”
Claim · model-written summary
LED lighting altered morphology and increased accumulation of bioprotective compounds and total yield.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- LED lightinge0
- Outcome
- accumulation of bioprotective compounds and total yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LED lighting induced a number of effects on morphology that increased both accumulation of bioprotective compounds and total yield”
t0“Lactuca sativa cv. Outredgeous”
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See all 71 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.