Abstract
This study was conducted to the effect of low air temperature and light intensity conditions on yield and quality of tomato at the early stage of growth in Korea. Inplastic greenhouses, low temperature and low temperature with shade treatments were performed from 17 to 42 days after plant. Tomato growing degree days were decreased 5.5% due to cold treatment during the treatment period. Light intensity decreased 74.7% of growing degree days due to shade. After commencing treatments, the plant growth decreased by low temperature and low radiation except for height. Analysis of the yield showed that the first harvest date was the same, but the yield of the control was 3.3 times higher than low temperature with shade treatment. The cumulative yields at 87 days after transplanting were 1734, 1131, and 854 g per plant for control, low temperature, and low temperature with shade, respectively. The sugar and acidity of tomatoes did not differ between treatment and harvesting season. To investigate the photosynthetic characteristics according to the treatment, the carbon dioxide reaction curve was analyzed using the biochemical model of the photosynthetic rate. The results showed that the maximum photosynthetic rate, J (electric transportation rate), TPU (triose phosphate utilization), and Rd (dark respiration rate) did not show any difference with temperature, but were reduced by shading. Vcmax (maximum carboxylation rate) was decreased depending on the low temperature and the shade. Results indicated that low temperature and light intensity at the early growth stage can be inhibited the growth in the early stage but this phenomenon might be recovered afterward. The yield was reduced by low temperature and low intensity and there was no difference in quality.
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Claims 9
Claim · model-written summary
Cold treatment decreased tomato growing degree days by 5.5%.
- Taxon
- Tomato
Solanum lycopersicume0 - Treatment
- cold treatmente0
- Outcome
- growing degree dayse0
- Direction
- decreasede0
- Value
- 5.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato growing degree days were decreased 5.5% due to cold treatment during the treatment period.”
Claim · model-written summary
Shade decreased light intensity by 74.7%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- shadee0
- Outcome
- Light intensitye0
- Direction
- decreasede0
- Value
- 74.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light intensity decreased 74.7% of growing degree days due to shade.”
t0“Tomato”
Claim · model-written summary
Low temperature and low radiation decreased plant growth except height.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- low temperature and low radiatione0
- Outcome
- plant growthe0
- Direction
- decreasede0
- Qualifier
- except for heighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plant growth decreased by low temperature and low radiation except for height”
t0“Tomato”
Claim · model-written summary
The first harvest date was unchanged across treatments.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- low temperature with shade treatmente1
- Outcome
- first harvest datee0
- Direction
- the samee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the first harvest date was the same”
e1“the yield of the control was 3.3 times higher than low temperature with shade treatment”
t0“Tomato”
Claim · model-written summary
Control yield was 3.3 times the yield under low temperature with shade.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- low temperature with shade treatmente0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 3.3 timese0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield of the control was 3.3 times higher than low temperature with shade treatment”
t0“Tomato”
Claim · model-written summary
Control cumulative yield at 87 days was 1734 g per plant.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- cumulative yieldse0
- Value
- 1734, 1131, and 854 g per plante0
- Qualifier
- 87 days after transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cumulative yields at 87 days after transplanting were 1734, 1131, and 854 g per plant for control, low temperature, and low temperature with shade, respectively.”
t0“Tomato”
Claim · model-written summary
Tomato sugar and acidity did not differ by treatment or harvest season.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- treatmente0
- Outcome
- sugar and aciditye0
- Direction
- did not differe0
- Comparator
- harvesting seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugar and acidity of tomatoes did not differ between treatment and harvesting season.”
Claim · model-written summary
Shading reduced maximum photosynthetic rate, J, TPU and Rd, while temperature did not change them.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- shadinge0
- Outcome
- maximum photosynthetic rate, J (electric transportation rate), TPU (triose phosphate utilization), and Rd (dark respiration rate)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum photosynthetic rate, J (electric transportation rate), TPU (triose phosphate utilization), and Rd (dark respiration rate) did not show any difference with temperature, but were reduced by shading”
t0“Tomato”
Claim · model-written summary
Vcmax decreased with low temperature and shade.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- low temperature and the shadee0
- Outcome
- Vcmax (maximum carboxylation rate)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vcmax (maximum carboxylation rate) was decreased depending on the low temperature and the shade.”
t0“Tomato”
The same questions in other papers
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See all 9 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.