Abstract
Lettuce (Lactuca sativa L.) var. ‘Lollo rossa’ was grown in a floating hydroponic system. Six saline treatments were used, adding different concentrations of calcium chloride (CaCl2) to the nutrient solution (mol m−3): 0, 2.5, 5, 10, 15, 20, which, respectively, corresponds to an electrical conductivity of 2.5, 3, 3.5, 4.4, 5.4, 6.3 dS m−1. In plants subjected to moderate salinity stress the growth was not affected and yields were not statistically significant; however, the data shows a slight decline in 20 mol m−3 CaCl2 treatments. Nitrate contents in the leaf decreased when the concentration of CaCl2 in nutrient solutions increased. Other quality parameters were positively affected by treatment with CaCl2, especially at moderate concentrations such as 5 and 10 mol m−3. In fact, both the content of phenols and antioxidant power increased at moderate salt concentrations and reduced in the treatment with 20 mol m−3 CaCl2. The content of chlorophyll and carotenoids were not affected by treatment even at high salt concentrations. The use of CaCl2 did not result in nutrition imbalances in plants either. In fact, the ratio K/Na remained unchanged in the various treatments, as well as the contents of microelements.
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Claims 8
Claim · model-written summary
At moderate salinity, lettuce growth was not affected and yields were not statistically significant.
- Taxon
- Lettuce
Lactuca sativae0 - Treatment
- moderate salinity stresse1
- Outcome
- growthe1
- Direction
- not affectede1
- Qualifier
- yields were not statistically significante1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e1“In plants subjected to moderate salinity stress the growth was not affected and yields were not statistically significant”
Claim · model-written summary
The 20 mol m−3 CaCl2 treatment showed a slight decline in lettuce yield.
- Taxon
- LettuceLactuca sativae0
- Treatment
- 20 mol m−3 CaCl2e2
- Outcome
- yieldse1
- Direction
- declinee2
- Qualifier
- slighte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e1“In plants subjected to moderate salinity stress the growth was not affected and yields were not statistically significant”
e2“the data shows a slight decline in 20 mol m−3 CaCl2 treatments”
Claim · model-written summary
Nitrate content in lettuce leaves decreased as CaCl2 concentration in the nutrient solution increased.
- Taxon
- LettuceLactuca sativae0
- Treatment
- concentration of CaCl2e3
- Outcome
- Nitrate contents in the leafe3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e3“Nitrate contents in the leaf decreased when the concentration of CaCl2 in nutrient solutions increased”
Claim · model-written summary
Phenol content and antioxidant power of lettuce increased at moderate CaCl2 concentrations.
- Taxon
- LettuceLactuca sativae0
- Treatment
- moderate salt concentrationse4
- Outcome
- content of phenols and antioxidant powere4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e4“both the content of phenols and antioxidant power increased at moderate salt concentrations”
Claim · model-written summary
Phenol content and antioxidant power of lettuce were reduced at 20 mol m−3 CaCl2.
- Taxon
- LettuceLactuca sativae0
- Treatment
- 20 mol m−3 CaCl2e5
- Outcome
- antioxidant powere4
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e4“both the content of phenols and antioxidant power increased at moderate salt concentrations”
e5“reduced in the treatment with 20 mol m−3 CaCl2”
Claim · model-written summary
Chlorophyll and carotenoid contents of lettuce were not affected even at high salt concentrations.
- Taxon
- LettuceLactuca sativae0
- Treatment
- high salt concentrationse6
- Outcome
- content of chlorophyll and carotenoidse6
- Direction
- not affectede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e6“The content of chlorophyll and carotenoids were not affected by treatment even at high salt concentrations”
Claim · model-written summary
The K/Na ratio remained unchanged across CaCl2 treatments, as did microelement contents.
- Taxon
- LettuceLactuca sativae0
- Treatment
- various treatmentse7
- Outcome
- ratio K/Nae7
- Direction
- remained unchangede7
- Qualifier
- contents of microelementse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e7“the ratio K/Na remained unchanged in the various treatments, as well as the contents of microelements”
Claim · model-written summary
CaCl2 use did not cause nutrition imbalances in lettuce.
- Taxon
- LettuceLactuca sativae0
- Treatment
- use of CaCl2e1
- Outcome
- nutrition imbalancese1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa L.)”
e1“The use of CaCl2 did not result in nutrition imbalances in plants either”
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