Abstract
Abstract BACKGROUND Through precise control of the nutrient solution (NS), closed soilless systems enable targeted manipulation of plant secondary metabolites, which constitute health‐promoting components of the human daily diet. A nutrient film technique (NFT) system was employed to assess the effect of NS macronutrient‐based concentration (full, half‐, and quarter‐strength corresponding to electrical conductivity (EC) of 1.5, 0.75, and 0.5 dS m −1 ) on the bioactive profile of red and green‐pigmented Salanova® butterhead lettuce. RESULTS Half‐strength NS reduced fresh biomass of both cultivars by 14%, whereas quarter‐strength NS reduced the fresh biomass of green and red Salanova by 24% and 38%, respectively. However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS. CONCLUSIONS Nutritional eustress and appropriate cultivar selection are effective means to increase phytochemical content and optimize year‐round production of lettuce in closed soilless systems. © 2019 Society of Chemical Industry
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Claims 10
Claim · model-written summary
Half-strength nutrient solution reduced fresh biomass of both lettuce cultivars by 14%.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- Half‐strength NSe1
- Outcome
- fresh biomasse1
- Direction
- reducede1
- Value
- 14%e1
- Qualifier
- both cultivarse1
- Comparator
- control, full‐strength NSe2
- Setting
- nutrient film technique (NFT) systeme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“Half‐strength NS reduced fresh biomass of both cultivars by 14%, whereas quarter‐strength NS reduced the fresh biomass of green and red Salanova by 24% and 38%, respectively”
e2“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e3“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Quarter-strength nutrient solution reduced fresh biomass of green Salanova lettuce by 24%.
- Taxon
- lettuceLactuca sativat0
- Material
- greene1
- Treatment
- quarter‐strength NSe1
- Outcome
- fresh biomasse1
- Direction
- reducede1
- Value
- 24%e1
- Comparator
- control, full‐strength NSe2
- Setting
- nutrient film technique (NFT) systeme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“Half‐strength NS reduced fresh biomass of both cultivars by 14%, whereas quarter‐strength NS reduced the fresh biomass of green and red Salanova by 24% and 38%, respectively”
e2“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e3“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Quarter-strength nutrient solution reduced fresh biomass of red Salanova lettuce by 38%.
- Taxon
- lettuceLactuca sativat0
- Material
- rede1
- Treatment
- quarter‐strength NSe1
- Outcome
- fresh biomasse1
- Direction
- reducede1
- Value
- 38%e1
- Comparator
- control, full‐strength NSe2
- Setting
- nutrient film technique (NFT) systeme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“Half‐strength NS reduced fresh biomass of both cultivars by 14%, whereas quarter‐strength NS reduced the fresh biomass of green and red Salanova by 24% and 38%, respectively”
e2“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e3“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Half-strength nutrient solution boosted total ascorbic acid in red Salanova lettuce by 266%.
- Taxon
- lettuceLactuca sativat0
- Material
- red Salanovae1
- Treatment
- half‐strength NSe1
- Outcome
- total ascorbic acide1
- Direction
- boostede1
- Value
- 266%e1
- Comparator
- control, full‐strength NSe1
- Setting
- nutrient film technique (NFT) systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e2“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Half-strength nutrient solution boosted chlorogenic acid in red Salanova lettuce by 199%.
- Taxon
- lettuceLactuca sativat0
- Material
- red Salanovae1
- Treatment
- half‐strength NSe1
- Outcome
- chlorogenice1
- Direction
- boostede1
- Value
- 199%e1
- Comparator
- control, full‐strength NSe1
- Setting
- nutrient film technique (NFT) systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e2“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Half-strength nutrient solution boosted chicoric acid in red Salanova lettuce by 124%.
- Taxon
- lettuceLactuca sativat0
- Material
- red Salanovae1
- Treatment
- half‐strength NSe1
- Outcome
- chicorice1
- Direction
- boostede1
- Value
- 124%e1
- Comparator
- control, full‐strength NSe1
- Setting
- nutrient film technique (NFT) systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e2“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Half-strength nutrient solution boosted caffeoyl-meso-tartaric acid in red Salanova lettuce by 251%.
- Taxon
- lettuceLactuca sativat0
- Material
- red Salanovae1
- Treatment
- half‐strength NSe1
- Outcome
- caffeoyl‐meso‐tartarice1
- Direction
- boostede1
- Value
- 251%e1
- Comparator
- control, full‐strength NSe1
- Setting
- nutrient film technique (NFT) systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e2“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Half-strength nutrient solution boosted total phenolic acids in red Salanova lettuce by 162%.
- Taxon
- lettuceLactuca sativat0
- Material
- red Salanovae1
- Treatment
- half‐strength NSe1
- Outcome
- total phenolic acidse1
- Direction
- boostede1
- Value
- 162%e1
- Comparator
- control, full‐strength NSe1
- Setting
- nutrient film technique (NFT) systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e2“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Half-strength nutrient solution boosted anthocyanins in red Salanova lettuce by 380%.
- Taxon
- lettuceLactuca sativat0
- Material
- red Salanovae1
- Treatment
- half‐strength NSe1
- Outcome
- anthocyaninse1
- Direction
- boostede1
- Value
- 380%e1
- Comparator
- control, full‐strength NSe1
- Setting
- nutrient film technique (NFT) systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“However, moderate nutrient stress (half‐strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl‐meso‐tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full‐strength NS”
e2“A nutrient film technique (NFT) system was employed”
Claim · model-written summary
Nutritional eustress and appropriate cultivar selection are effective means to increase phytochemical content of lettuce in closed soilless systems.
- Taxon
- lettuceLactuca sativat0
- Treatment
- Nutritional eustresse1
- Outcome
- increase phytochemical contente1
- Qualifier
- appropriate cultivar selectione1
- Setting
- closed soilless systemse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“red and green‐pigmented butterhead lettuce”
e1“Nutritional eustress and appropriate cultivar selection are effective means to increase phytochemical content and optimize year‐round production of lettuce in closed soilless systems”
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See all 248 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.