Abstract
In the Mediterranean region, tomato plants are often cultivated in two short cycles per year to avoid the heat of summer and the low solar radiation of winter. Supplementary light (SL) makes it possible to cultivate during the dark season. In this experiment, a tomato F1 hybrid cultivar DRW7723 was cultivated in a greenhouse for a fall-winter cycle. After transplant, light emitting diode (LED) interlighting, with two light spectra (red + blue vs. red + blue + far-red) was applied as SL. Plant growth, yield, gas exchange, nutrient solution (NS) consumption, and fruit quality were analyzed. In general, the effects of adding far-red radiation were not visible on the parameters analyzed, although the yield was 27% higher in plants grown with SL than those grown without. Tomatoes had the same average fresh weight between SL treatments, but the plants grown with SL produced 16% more fruits than control. Fruit quality, gas exchange and NS uptake were not influenced by the addition of far-red light. Interlighting is, therefore, a valid technique to increase fruit production in winter but at our latitude the effects of adding far-red radiation are mitigated by available sunlight.
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Claims 9
Claim · model-written summary
Adding far-red generally had no visible effects on measured parameters.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- adding far-red radiatione0
- Outcome
- parameters analyzede0
- Direction
- not visiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of adding far-red radiation were not visible on the parameters analyzed”
t0“Tomato”
Claim · model-written summary
Supplementary light increased tomato yield by 27% compared with no supplementary light.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- SLe0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 27%e0
- Comparator
- those grown withoute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield was 27% higher in plants grown with SL than those grown without”
t0“Tomato”
Claim · model-written summary
Tomato fresh weight was the same between supplementary light spectra.
- Taxon
- TomatoesSolanum lycopersicume0
- Treatment
- SL treatmentse0
- Outcome
- average fresh weighte0
- Direction
- samee0
- Comparator
- SL treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomatoes had the same average fresh weight between SL treatments”
Claim · model-written summary
Supplementary light increased tomato fruit number by 16% relative to control.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- SLe0
- Outcome
- fruitse0
- Direction
- moree0
- Value
- 16%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plants grown with SL produced 16% more fruits than control”
t0“Tomato”
Claim · model-written summary
Added far-red did not influence tomato fruit quality.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- addition of far-red lighte0
- Outcome
- Fruit qualitye0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit quality, gas exchange and NS uptake were not influenced by the addition of far-red light”
t0“Tomato”
Claim · model-written summary
Added far-red did not influence tomato gas exchange.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- addition of far-red lighte0
- Outcome
- gas exchangee0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit quality, gas exchange and NS uptake were not influenced by the addition of far-red light”
t0“Tomato”
Claim · model-written summary
Added far-red did not influence tomato nutrient solution uptake.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- addition of far-red lighte0
- Outcome
- NS uptakee0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit quality, gas exchange and NS uptake were not influenced by the addition of far-red light”
t0“Tomato”
Claim · model-written summary
The authors consider interlighting useful for increasing winter fruit production.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- Interlighting is, therefore, a valid technique to increase fruit production in wintere0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interlighting is, therefore, a valid technique to increase fruit production in winter”
t0“Tomato”
Claim · model-written summary
The authors attribute mitigated far-red effects to available sunlight at their latitude.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- effects of adding far-red radiatione0
- Qualifier
- available sunlighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at our latitude the effects of adding far-red radiation are mitigated by available sunlight”
t0“Tomato”
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