Abstract
The aim of this study was to evaluate the effect of combination of light-emitting diodes (LEDs) and high-pressure sodium (HPS) lighting on the growth of lettuce variety 'Multigreen 3' in a greenhouse. Supplemental blue light had an impact on the efficiency of photosynthetic performance in lettuce; however, different blue light wavelengths had uneven effect. The 470 nm light also had a positive impact on chlorophyll a to b ratio and higher specific leaf area (SLA) value and resulted in increased plant mass per leaf area. The overall growth performance, higher contents of soluble saccharides and higher growth rates, represented by net assimilation rate (NAR) value were determined in lettuce, cultivated under blue 455 nm light. The 505 nm light, being intermediate between blue and green wavelengths, had a significant positive effect on the content of photosynthetic pigments, higher NAR value thus also might be beneficial for supplemental baby leaf lettuce illumination. Green 535 nm light stimulated accumulation of soluble saccharides in lettuce and had controversial effect on photosynthetic pigment contents and assimilative indices, thus the evidence for the effect was inconclusive.
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Claims 8
Claim · model-written summary
Supplemental blue light affected photosynthetic performance, with uneven effects across wavelengths.
- Taxon
- leaf lettucet0
- Material
- lettucee0
- Treatment
- Supplemental blue lighte0
- Outcome
- efficiency of photosynthetic performancee0
Not reportedComparatorDirection
Verbatim
e0“Supplemental blue light had an impact on the efficiency of photosynthetic performance in lettuce; however, different blue light wavelengths had uneven effect.”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
470 nm light raised the chlorophyll a to b ratio and specific leaf area.
- Taxon
- leaf lettucet0
- Treatment
- 470 nm lighte0
- Outcome
- chlorophyll a to b ratio and higher specific leaf area (SLA) valuee0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“The 470 nm light also had a positive impact on chlorophyll a to b ratio and higher specific leaf area (SLA) value and resulted in increased plant mass per leaf area.”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
470 nm light increased plant mass per leaf area.
Not reportedComparator
Verbatim
e0“The 470 nm light also had a positive impact on chlorophyll a to b ratio and higher specific leaf area (SLA) value and resulted in increased plant mass per leaf area.”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
455 nm blue light gave higher soluble saccharides and net assimilation rate and better overall growth.
- Taxon
- leaf lettucet0
- Material
- lettucee0
- Treatment
- blue 455 nm lighte0
- Outcome
- overall growth performance, higher contents of soluble saccharides and higher growth ratese0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“The overall growth performance, higher contents of soluble saccharides and higher growth rates, represented by net assimilation rate (NAR) value were determined in lettuce, cultivated under blue 455 nm light.”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
505 nm light increased photosynthetic pigment content.
- Taxon
- leaf lettucet0
- Treatment
- 505 nm lighte0
- Outcome
- content of photosynthetic pigmentse0
- Direction
- positive effecte0
Not reportedComparator
Verbatim
e0“The 505 nm light, being intermediate between blue and green wavelengths, had a significant positive effect on the content of photosynthetic pigments, higher NAR value thus also might be beneficial for supplemental baby leaf lettuce illumination.”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
505 nm light produced a higher net assimilation rate.
Not reportedComparator
Verbatim
e0“The 505 nm light, being intermediate between blue and green wavelengths, had a significant positive effect on the content of photosynthetic pigments, higher NAR value thus also might be beneficial for supplemental baby leaf lettuce illumination.”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
535 nm green light stimulated soluble saccharide accumulation.
- Taxon
- leaf lettucet0
- Treatment
- Green 535 nm lighte0
- Outcome
- accumulation of soluble saccharidese0
- Direction
- stimulatede0
Not reportedComparator
Verbatim
e0“Green 535 nm light stimulated accumulation of soluble saccharides in lettuce”
t0“leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
535 nm light had inconclusive effects on pigment content and assimilative indices.
- Taxon
- leaf lettucet0
- Outcome
- photosynthetic pigment contents and assimilative indicese0
- Qualifier
- inconclusivee0
Not reportedTreatmentComparatorDirection
Verbatim
e0“had controversial effect on photosynthetic pigment contents and assimilative indices, thus the evidence for the effect was inconclusive.”
t0“leaf lettuce (Lactuca sativa L.)”
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See all 300 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.