Abstract
Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content and the European Commission has set maximum level for nitrate in lettuce. Glycinebetaine is an organic osmolyte alleviating plant stress, but its role in leaf nitrate accumulation remains unknown. The uptake of glycinebetaine by lettuce roots, and its potential to regulate lettuce nitrate content and improve plant quality were investigated. Two hydroponic lettuce experiments were conducted with different glycinebetaine application rates (Exp1: 0, 1, 7.5, and 15 mM; Exp2: 0, 1 + 1 + 1, 1 + 10, and 4 mM). Plants were analyzed at varying time points. Root application resulted in glycinebetaine uptake and translocation to the leaves. Glycinebetaine concentrations > 7.5 mM reduced leaf nitrate up to 40% and increased leaf dry matter content. Glycinebetaine showed a positive effect on leaf mineral and amino acid composition. Thus, glycinebetaine could be a novel strategy to reduce the nitrate content in hydroponic lettuce.
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Claims 5
Claim · model-written summary
Glycinebetaine concentrations above 7.5 mM reduced leaf nitrate in hydroponic lettuce by up to 40%.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- Glycinebetaine concentrations > 7.5 mMe1
- Outcome
- leaf nitratee1
- Direction
- reducede1
- Value
- up to 40%e1
- Setting
- hydroponically grownt0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content”
e1“Glycinebetaine concentrations > 7.5 mM reduced leaf nitrate up to 40% and increased leaf dry matter content”
t0“Root-applied glycinebetaine decreases nitrate accumulation and improves quality in hydroponically grown lettuce”
Claim · model-written summary
Glycinebetaine concentrations above 7.5 mM increased leaf dry matter content in hydroponic lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Glycinebetaine concentrations > 7.5 mMe1
- Outcome
- leaf dry matter contente1
- Direction
- increasede1
- Setting
- hydroponically grownt0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content”
e1“Glycinebetaine concentrations > 7.5 mM reduced leaf nitrate up to 40% and increased leaf dry matter content”
t0“Root-applied glycinebetaine decreases nitrate accumulation and improves quality in hydroponically grown lettuce”
Claim · model-written summary
Root application of glycinebetaine led to its uptake and translocation to lettuce leaves.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Root applicatione1
- Outcome
- glycinebetaine uptake and translocation to the leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content”
e1“Root application resulted in glycinebetaine uptake and translocation to the leaves”
Claim · model-written summary
Glycinebetaine had a positive effect on leaf mineral and amino acid composition of lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Glycinebetainee1
- Outcome
- leaf mineral and amino acid compositione1
- Direction
- positive effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content”
e1“Glycinebetaine showed a positive effect on leaf mineral and amino acid composition”
Claim · model-written summary
Glycinebetaine could be a strategy to reduce nitrate content in hydroponic lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- glycinebetainee1
- Outcome
- reduce the nitrate contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content”
e1“glycinebetaine could be a novel strategy to reduce the nitrate content in hydroponic lettuce”
The same questions in other papers
glycine betaine · quality: general · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- positive
glycine betaine · nutrient: content · Lactuca sativa (garden lettuce)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.