Abstract
There is a growing interest in the impact of light intensity and temperature on vegetable growth and dietary quality characteristics. Lettuce (Lactuca sativa L.), as one of the model vegetables in plant factories, was grown under two light levels (G1: 160 µmol m–2 s–1, G2: 200 µmol m–2 s–1) with different day/night temperatures (T1: 20 ± 1°C/15 ± 1°C, T2: 24 ± 1°C/19 ± 1°C) to investigate mutual effects of light intensity and temperature on its growth and quality properties. The results revealed that the T2G2 treatment showed higher plant height, biomass and net photosynthetic rate, while T1G2 resulted in decreased leaf area and lower maximum photochemical efficiency of photosystem II (Fv/Fm) compared to T1G1. Simultaneous increases in light intensity and temperature based on T1G1 significantly increased the contents of anthocyanin, vitamin C (Vc) and soluble protein by 58%, 21% and 172%, respectively. The higher light intensity promoted the nutritional values of lettuce, characterised by lower nitrate level and soluble protein contents. Principal component analysis showed a negative collinearity between the nitrate content and soluble protein and Vc contents. In conclusion, light intensity and temperature co-regulated the lettuce’s growth and development, and their simultaneous increases better for growth and nutritional values of lettuce. These results provide a better understanding of the cultivation of plants in an artificial plant factory while maintaining yield and quality.
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Claims 9
Claim · model-written summary
T2G2 gave higher plant height, biomass and net photosynthetic rate.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- T2G2 treatmente0
- Outcome
- plant height, biomass and net photosynthetic ratee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“T2G2 treatment showed higher plant height, biomass and net photosynthetic rate”
Claim · model-written summary
T1G2 decreased leaf area relative to T1G1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“T1G2 resulted in decreased leaf area and lower maximum photochemical efficiency of photosystem II (Fv/Fm) compared to T1G1”
Claim · model-written summary
T1G2 lowered maximum photosystem II efficiency relative to T1G1.
- Taxon
- lettuceLactuca sativat0
- Treatment
- T1G2e0
- Outcome
- maximum photochemical efficiency of photosystem II (Fv/Fm)e0
- Direction
- lowere0
- Comparator
- T1G1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“T1G2 resulted in decreased leaf area and lower maximum photochemical efficiency of photosystem II (Fv/Fm) compared to T1G1”
Claim · model-written summary
Simultaneously raising light and temperature increased anthocyanin by 58%.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Simultaneous increases in light intensity and temperaturee0
- Outcome
- contents of anthocyanine0
- Direction
- increasede0
- Value
- 58%e0
- Comparator
- T1G1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“Simultaneous increases in light intensity and temperature based on T1G1 significantly increased the contents of anthocyanin, vitamin C (Vc) and soluble protein by 58%, 21% and 172%, respectively”
Claim · model-written summary
Simultaneously raising light and temperature increased vitamin C by 21%.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Simultaneous increases in light intensity and temperaturee0
- Outcome
- vitamin C (Vc)e0
- Direction
- increasede0
- Value
- 21%e0
- Comparator
- T1G1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“Simultaneous increases in light intensity and temperature based on T1G1 significantly increased the contents of anthocyanin, vitamin C (Vc) and soluble protein by 58%, 21% and 172%, respectively”
Claim · model-written summary
Simultaneously raising light and temperature increased soluble protein by 172%.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Simultaneous increases in light intensity and temperaturee0
- Outcome
- soluble proteine0
- Direction
- increasede0
- Value
- 172%e0
- Comparator
- T1G1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“Simultaneous increases in light intensity and temperature based on T1G1 significantly increased the contents of anthocyanin, vitamin C (Vc) and soluble protein by 58%, 21% and 172%, respectively”
Claim · model-written summary
Higher light intensity lowered nitrate levels.
- Taxon
- lettuceLactuca sativat0
- Treatment
- higher light intensitye0
- Outcome
- nitrate levele0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“The higher light intensity promoted the nutritional values of lettuce, characterised by lower nitrate level and soluble protein contents”
Claim · model-written summary
Higher light intensity lowered soluble protein contents.
- Taxon
- lettuceLactuca sativat0
- Treatment
- higher light intensitye0
- Outcome
- soluble protein contentse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“The higher light intensity promoted the nutritional values of lettuce, characterised by lower nitrate level and soluble protein contents”
Claim · model-written summary
Nitrate content was negatively correlated with soluble protein and vitamin C contents.
- Taxon
- lettuceLactuca sativat0
- Compound
- soluble protein and Vc contentse0
- Outcome
- nitrate contente0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lettuce”
e0“negative collinearity between the nitrate content and soluble protein and Vc contents”
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See all 20 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.