Abstract
The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution. In seedling lettuce, NaCl exerted both a specific ion effect and a salinity or osmotic effect. The specific ion effect was exhibited at relative low concentrations of NaCl and resulted in minimal yield depression. The salinity or osmotic effect was exhibited at higher concentrations of NaCl and was associated with a reduction in water potential. The controlling influence of water potential was verified by a similar dose-response curve developed under PEG (polyethylene glycol) 6000 and high-strength nutrient solution. The Ni was toxic at a relatively low concentration of 10 μM L−1 and thus by itself contributed only specific ion toxicity. The Ni dose-response curve was biphasic with a toxicity threshold at 10 μM L−1 and a phase change at 30 μM L−1, which was associated with an 87% yield reduction. The interaction between Ni and NaCl must be described in terms of both Ni effect on NaCl and NaCl effect on Ni. The interaction of NaCl on the Ni dose-response curve was additive in the first phase. The type of interaction, although also occurring in the second phase of the Ni dose-response curve, was not clear in these studies. The interaction of Ni on the NaCl dose-response curve was primarily on the specific ion toxicity portion of the curve with little effect in the osmotic part of the curve. At low levels of Ni, such as 10 μM L−1, Ni protected against toxicity from NaCl. The toxicity threshold of the first phase of the NaCl curve was shifted toward being less sensitive in the presence of high concentrations of Ni. Thus high concentrations of Ni (toxic levels) decreased to some degree the specific ion effect of Na. Analysis of plant tissue indicated that absorption of Na was reduced by Ni.
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Claims 10
Claim · model-written summary
Low NaCl concentrations had a specific ion effect with minimal yield depression in lettuce.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- relative low concentrations of NaCle1
- Outcome
- yielde1
- Direction
- depressione1
- Qualifier
- minimale1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e1“The specific ion effect was exhibited at relative low concentrations of NaCl and resulted in minimal yield depression”
Claim · model-written summary
Higher NaCl concentrations were associated with a reduction in water potential in lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- higher concentrations of NaCle2
- Outcome
- water potentiale2
- Direction
- reductione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e2“The salinity or osmotic effect was exhibited at higher concentrations of NaCl and was associated with a reduction in water potential”
Claim · model-written summary
Water potential controls the NaCl dose-response, as verified by a similar curve under PEG 6000 and high-strength nutrient solution.
- Taxon
- lettuceLactuca sativae0
- Outcome
- controlling influence of water potentiale3
- Qualifier
- similar dose-response curve developed under PEG (polyethylene glycol) 6000 and high-strength nutrient solutione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e3“The controlling influence of water potential was verified by a similar dose-response curve developed under PEG (polyethylene glycol) 6000 and high-strength nutrient solution”
Claim · model-written summary
The second Ni dose-response phase was associated with an 87% yield reduction in lettuce.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e5“The Ni dose-response curve was biphasic”
e6“which was associated with an 87% yield reduction”
Claim · model-written summary
Ni was toxic to lettuce at a relatively low concentration.
- Taxon
- lettuceLactuca sativae0
- Compound
- Nie4
- Outcome
- toxice4
- Qualifier
- at a relatively low concentratione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e4“The Ni was toxic at a relatively low concentration”
Claim · model-written summary
The NaCl and Ni interaction was additive in the first Ni dose-response phase.
- Taxon
- lettuceLactuca sativae0
- Treatment
- NaCle7
- Outcome
- interactione7
- Qualifier
- additive in the first phasee7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e7“The interaction of NaCl on the Ni dose-response curve was additive in the first phase”
Claim · model-written summary
Low Ni protected lettuce against toxicity from NaCl.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Nie1
- Outcome
- toxicity from NaCle1
- Direction
- protectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e1“Ni protected against toxicity from NaCl”
Claim · model-written summary
High Ni shifted the first-phase NaCl toxicity threshold toward being less sensitive.
- Taxon
- lettuceLactuca sativae0
- Treatment
- high concentrations of Nie1
- Outcome
- toxicity threshold of the first phase of the NaCl curvee1
- Direction
- shifted toward being less sensitivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e1“The toxicity threshold of the first phase of the NaCl curve was shifted toward being less sensitive in the presence of high concentrations of Ni”
Claim · model-written summary
High Ni decreased the specific ion effect of Na in lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- high concentrations of Ni (toxic levels)e1
- Outcome
- specific ion effect of Nae1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e1“high concentrations of Ni (toxic levels) decreased to some degree the specific ion effect of Na”
Claim · model-written summary
Ni reduced Na absorption in lettuce plant tissue.
- Taxon
- lettuceLactuca sativae0
- Organ / stage
- plant tissuee1
- Treatment
- Nie1
- Outcome
- absorption of Nae1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect on growth of the interaction between the osmotic effect of NaCl and the specific ion toxicity of Ni was studied using lettuce in completely defined nutrient solution”
e1“Analysis of plant tissue indicated that absorption of Na was reduced by Ni”
The same questions in other papers
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- positive
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2 papers more in this group
See all 6 papers →nickel atom · pest · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- 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.