Abstract
Short-term nitrogen limitation and continuous lighting (red/blue = 3:1) were applied individually and in combination to butterhead and red oak leaf lettuce for 1, 2, or 3 days before harvest to assess their effects on improving the nutritional value and sweet taste and reducing nitrate content and bitterness of lettuce. The results suggested that a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones and improved the quantities of soluble sugar, soluble protein, anthocyanins, and phenolic compounds without reducing the fresh weight of lettuce. In addition, in vitro simulated digestion results suggested that the 3-day nitrogen limitation combined with continuous lighting significantly improved the sweetness and reduced the bitterness of lettuce compared to the control. In conclusion, nitrogen limitation combined with continuous lighting for 3 days before harvest effectively enhanced the quality and taste of lettuce, showing great potential for its use in hydroponic lettuce production.
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Claims 9
Claim · model-written summary
Three-day nitrogen limitation with continuous lighting reduced lettuce nitrate.
- Taxon
- Lettuce
Lactuca sativat0 - Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- nitratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones”
t0“Lettuce”
Claim · model-written summary
Three-day nitrogen limitation with continuous lighting reduced lettuce sesquiterpene lactones.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- sesquiterpene lactonese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones”
t0“Lettuce”
Claim · model-written summary
Three-day nitrogen limitation with continuous lighting improved lettuce soluble sugar.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- soluble sugare0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones and improved the quantities of soluble sugar, soluble protein, anthocyanins, and phenolic compounds without reducing the fresh weight of lettuce.”
t0“Lettuce”
Claim · model-written summary
Three-day nitrogen limitation with continuous lighting improved lettuce soluble protein.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- soluble proteine0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones and improved the quantities of soluble sugar, soluble protein, anthocyanins, and phenolic compounds without reducing the fresh weight of lettuce.”
t0“Lettuce”
Claim · model-written summary
Three-day nitrogen limitation with continuous lighting improved lettuce anthocyanins.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- anthocyaninse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones and improved the quantities of soluble sugar, soluble protein, anthocyanins, and phenolic compounds without reducing the fresh weight of lettuce.”
t0“Lettuce”
Claim · model-written summary
Three-day nitrogen limitation with continuous lighting improved lettuce phenolic compounds.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- phenolic compoundse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones and improved the quantities of soluble sugar, soluble protein, anthocyanins, and phenolic compounds without reducing the fresh weight of lettuce.”
t0“Lettuce”
Claim · model-written summary
The combined treatment did not reduce lettuce fresh weight.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- fresh weighte0
- Direction
- without reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“a 3-day nitrogen limitation combined with continuous lighting reduced the lettuce content of nitrate and sesquiterpene lactones and improved the quantities of soluble sugar, soluble protein, anthocyanins, and phenolic compounds without reducing the fresh weight of lettuce.”
Claim · model-written summary
The treatment significantly improved lettuce sweetness relative to control.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- sweetnesse0
- Direction
- improvede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“the 3-day nitrogen limitation combined with continuous lighting significantly improved the sweetness and reduced the bitterness of lettuce compared to the control.”
Claim · model-written summary
The treatment significantly reduced lettuce bitterness relative to control.
- Taxon
- LettuceLactuca sativat0
- Treatment
- 3-day nitrogen limitation combined with continuous lightinge0
- Outcome
- bitternesse0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce”
e0“the 3-day nitrogen limitation combined with continuous lighting significantly improved the sweetness and reduced the bitterness of lettuce compared to the control.”
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See all 52 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.