Abstract
Salinity represents an increasing threat to agricultural production in every region of the world. The objective of this investigation was to determine ameliorative effects of calcium chloride (CaCl2) on salt stressed lettuce (Lactuca sativa) in terms of growth, pigments and biochemical contents. The treatments were divided into 4 sections: control, 80mM NaCl, 80mM NaCl +5mM CaCl2 and 5mM CaCl2 alone. NaCl and CaCl2 stress decreased lettuce plant root and stem length, number of leaves and fresh weight versus the control. NaCl combined with CaCl2 increased these parameters versus treatments with NaCl or CaCl2 alone. Salt stress reduced the shoot and root fresh weight. The roots showed slightly increased growth under salinity, but after the treatment with CaCl2 the plants were normal. The pigment chlorophyll showed a diminishing trend in NaCl stressed plants, but it increased with CaCl2 application. The chlorophyll content increased in all plants with age. There was a slight decrease in carotenoid and anthocyanin contents with NaCl treated plants. CaCl2 also showed decrease in carotenoid and anthocyanin contents, but it was still higher than that of NaCl treated plants. Proline and phenol contents increased in lettuce plants under treatment with NaCl and CaCl2 when compared to the control. From these results, it can be concluded that the addition of CaCl2 to NaCl-stressed lettuce plants have a significant role in partial alleviation of salinity stress. Our results indicated that the cultivation of vegetable plants like lettuce in saline areas would be possible with supplemental calcium application.
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Claims 13
Claim · model-written summary
NaCl and CaCl2 stress reduced lettuce root and stem length, leaf number, and fresh weight relative to control.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- NaCl and CaCl2 stresse0
- Outcome
- root and stem length, number of leaves and fresh weighte0
- Direction
- decreasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl and CaCl2 stress decreased lettuce plant root and stem length, number of leaves and fresh weight versus the control.”
Claim · model-written summary
NaCl combined with CaCl2 increased these growth parameters against either treatment alone.
- Taxon
- lettuceLactuca sativae1
- Treatment
- NaCl combined with CaCl2e0
- Outcome
- these parameterse0
- Direction
- increasede0
- Comparator
- NaCl or CaCl2 alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl combined with CaCl2 increased these parameters versus treatments with NaCl or CaCl2 alone.”
t0“Lactuca sativa plants”
e1“salt stressed lettuce”
Claim · model-written summary
Salt stress reduced shoot and root fresh weight.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Salt stresse0
- Outcome
- shoot and root fresh weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress reduced the shoot and root fresh weight.”
t0“Lactuca sativa plants”
e1“salt stressed lettuce”
Claim · model-written summary
Roots grew slightly more under salinity.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- salinitye0
- Outcome
- rootse0
- Direction
- increasede0
- Qualifier
- slightlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots showed slightly increased growth under salinity, but after the treatment with CaCl2 the plants were normal.”
t0“Lactuca sativa plants”
Claim · model-written summary
Plants appeared normal after CaCl2 treatment.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- CaCl2e0
- Outcome
- plants were normale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots showed slightly increased growth under salinity, but after the treatment with CaCl2 the plants were normal.”
t0“Lactuca sativa plants”
Claim · model-written summary
NaCl reduced chlorophyll pigment.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- NaCle0
- Outcome
- pigment chlorophylle0
- Direction
- diminishinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pigment chlorophyll showed a diminishing trend in NaCl stressed plants, but it increased with CaCl2 application.”
t0“Lactuca sativa plants”
Claim · model-written summary
CaCl2 increased chlorophyll pigment.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- CaCl2e0
- Outcome
- pigment chlorophylle0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pigment chlorophyll showed a diminishing trend in NaCl stressed plants, but it increased with CaCl2 application.”
t0“Lactuca sativa plants”
Claim · model-written summary
Chlorophyll content increased with age.
- Taxon
- Lactuca sativaLactuca sativat0
- Organ / stage
- agee0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chlorophyll content increased in all plants with age.”
t0“Lactuca sativa plants”
Claim · model-written summary
NaCl slightly reduced carotenoid and anthocyanin contents.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- NaCle0
- Outcome
- carotenoid and anthocyanin contentse0
- Direction
- decreasee0
- Qualifier
- slighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a slight decrease in carotenoid and anthocyanin contents with NaCl treated plants.”
t0“Lactuca sativa plants”
Claim · model-written summary
CaCl2 reduced carotenoid and anthocyanin contents, though these remained higher than with NaCl.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- CaCl2e0
- Outcome
- carotenoid and anthocyanin contentse0
- Direction
- highere0
- Comparator
- NaCl treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaCl2 also showed decrease in carotenoid and anthocyanin contents, but it was still higher than that of NaCl treated plants.”
t0“Lactuca sativa plants”
Claim · model-written summary
NaCl and CaCl2 increased proline and phenol contents versus control.
- Taxon
- lettuceLactuca sativae0
- Treatment
- NaCl and CaCl2e0
- Outcome
- Proline and phenol contentse0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proline and phenol contents increased in lettuce plants under treatment with NaCl and CaCl2 when compared to the control.”
Claim · model-written summary
The authors concluded CaCl2 partly alleviates salt stress.
- Taxon
- lettuceLactuca sativae0
- Outcome
- partial alleviation of salinity stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of CaCl2 to NaCl-stressed lettuce plants have a significant role in partial alleviation of salinity stress.”
Claim · model-written summary
The authors suggested supplemental calcium could permit lettuce cultivation in saline areas.
- Taxon
- lettuceLactuca sativae0
- Outcome
- cultivation of vegetable plants like lettuce in saline areas would be possible with supplemental calcium applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cultivation of vegetable plants like lettuce in saline areas would be possible with supplemental calcium application.”
The same questions in other papers
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2 papers in the same direction as this paper
- positive
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salinity · growth · Lactuca sativa (garden lettuce)Results differ
57 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
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58 papers more in this group
See all 62 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.