Abstract
In long-term experiments with differentially salinized nutrient solutions, plants of Lycopersicon esculentum Mill cv. Walter failed at Na(+) concentrations of 200 millimolar or more but tolerated K(+) concentrations of that magnitude. The behavior of the wild, salt-tolerant Lycopersicon cheesmanii (Hook) C. H. Mull., accession number 1401, was diametrically different; it tolerated Na(+) at 200 millimolar, but K(+) at the same concentration proved toxic to it.Short-term comparative studies on the absorption and translocation of Na(+), K(+), and Cl(-) of the two species were carried out using radioactive tracers with excised roots and whole plants. These studies showed that, under high salt conditions (50-100 millimolar NaCl), the tolerant 1401 freely accumulated Na(+) in the shoot, while the salt-sensitive cultivar excluded it from the leaves, where it has been shown to be toxic.In experiments where K(+) was limiting, the salt-tolerant species could partially substitute Na(+) for K(+). Sodium stimulated growth even when K(+) was present at adequate concentrations. The domestic cultivar could not substitute Na(+) for K(+) and showed no similar growth stimulation when Na(+) was added in the presence of adequate K(+). The salt-tolerant 1401 was more efficient in K(+) absorption than was the domestic cultivar at both low and moderate ambient K(+) concentrations.The two species differed little in their chloride relations.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Lycopersicon esculentum cv. Walter failed at sodium concentrations of 200 millimolar or more.
- Taxon
- Lycopersicon esculentum
Solanum lycopersicume0 - Material
- Waltere0
- Treatment
- Na(+) concentrations of 200 millimolar or moree0
- Outcome
- plantse0
- Direction
- failede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants of Lycopersicon esculentum Mill cv. Walter failed at Na(+) concentrations of 200 millimolar or more but tolerated K(+) concentrations of that magnitude”
Claim · model-written summary
Lycopersicon esculentum cv. Walter tolerated potassium at 200 millimolar.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Material
- Waltere0
- Treatment
- K(+) concentrations of that magnitudee0
- Outcome
- plantse0
- Direction
- toleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants of Lycopersicon esculentum Mill cv. Walter failed at Na(+) concentrations of 200 millimolar or more but tolerated K(+) concentrations of that magnitude”
Claim · model-written summary
Wild Lycopersicon cheesmanii accession 1401 tolerated sodium at 200 millimolar.
- Taxon
- Lycopersicon cheesmaniie0
- Material
- accession number 1401e0
- Treatment
- Na(+) at 200 millimolare0
- Direction
- toleratede0
Not reportedComparatorOutcome
Verbatim
e0“Lycopersicon cheesmanii (Hook) C. H. Mull., accession number 1401, was diametrically different; it tolerated Na(+) at 200 millimolar”
Claim · model-written summary
Potassium at 200 millimolar was toxic to Lycopersicon cheesmanii accession 1401.
Not reportedTaxonComparatorOutcome
Verbatim
e0“it tolerated Na(+) at 200 millimolar, but K(+) at the same concentration proved toxic to it”
Claim · model-written summary
Under 50–100 millimolar NaCl, accession 1401 accumulated sodium in shoots.
- Material
- 1401e0
- Organ / stage
- shoote0
- Outcome
- Na(+)e0
- Direction
- freely accumulatede0
- Qualifier
- 50-100 millimolar NaCle0
Not reportedTaxon
Verbatim
e0“under high salt conditions (50-100 millimolar NaCl), the tolerant 1401 freely accumulated Na(+) in the shoot”
Claim · model-written summary
Under high salt, the sensitive cultivar excluded sodium from leaves.
Not reportedTaxonOutcome
Verbatim
e0“while the salt-sensitive cultivar excluded it from the leaves”
Claim · model-written summary
The salt-tolerant species partially substituted sodium for potassium when potassium was limiting.
Not reportedTaxon
Verbatim
e0“In experiments where K(+) was limiting, the salt-tolerant species could partially substitute Na(+) for K(+)”
Claim · model-written summary
Sodium stimulated growth of the salt-tolerant species even with adequate potassium.
- Treatment
- Sodiume0
- Outcome
- growthe0
- Direction
- stimulatede0
- Qualifier
- K(+) was present at adequate concentrationse0
Not reportedTaxonComparator
Verbatim
e0“Sodium stimulated growth even when K(+) was present at adequate concentrations”
Claim · model-written summary
The domestic cultivar could not substitute sodium for potassium.
Not reportedTaxon
Verbatim
e0“The domestic cultivar could not substitute Na(+) for K(+)”
Claim · model-written summary
The domestic cultivar showed no growth stimulation from sodium with adequate potassium.
Not reportedTaxonComparator
Verbatim
e0“showed no similar growth stimulation when Na(+) was added in the presence of adequate K(+)”
Claim · model-written summary
Accession 1401 absorbed potassium more efficiently than the domestic cultivar at low and moderate potassium.
- Material
- 1401e0
- Outcome
- K(+) absorptione0
- Direction
- more efficiente0
- Qualifier
- low and moderate ambient K(+) concentrationse0
- Comparator
- domestic cultivare0
Not reportedTaxon
Verbatim
e0“The salt-tolerant 1401 was more efficient in K(+) absorption than was the domestic cultivar at both low and moderate ambient K(+) concentrations”
Claim · model-written summary
The two tomato species differed little in chloride relations.
Not reportedTaxon
Verbatim
e0“The two species differed little in their chloride relations”
The same questions in other papers
sodium atom · growth · Solanum lycopersicum (tomato)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
7 papers more in this group
See all 11 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.