Abstract
This study concerned the degree to which Na or Rb could substitute for K in the growth of sugar beet plants when K in the culture solution was low (1 meq/liter) or high (12 meq/liter).Sodium at high concentrations increased the growth of plants in a basal nutrient medium when either deficient in K or when adequately supplied with K alone. Redistribution of K from petioles to blades could not fully explain these results. Therefore, the essentiality of Na per se for growth of sugar beet plants may be inferred.Rubidium increased the growth of plants significantly when supplied in small doses to a nutrient medium deficient or adequately supplied with K. The amount of K added and the mode of Rb addition to solution cultures should be carefully considered when studying the effect of Rb on growth. High Rb concentrations were toxic, especially to the growth of fibrous roots.Sodium or Rb have been shown to enhance the growth of sugar beet plants under either low or high K conditions. Essentiality of either Na and/or Rb per se for growth of sugar beets may be inferred, but other criteria should be fulfilled also for conclusive proof.
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Claims 6
Claim · model-written summary
High sodium increased growth in both deficient and adequate potassium media.
- Taxon
- sugar beet plants
Beta vulgaris subsp. vulgarise1 - Treatment
- Sodium at high concentrationse0
- Outcome
- growth of plantse0
- Direction
- increasede0
- Qualifier
- when either deficient in K or when adequately supplied with K alonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium at high concentrations increased the growth of plants in a basal nutrient medium when either deficient in K or when adequately supplied with K alone”
e1“Sugar Beet Plants”
Claim · model-written summary
Redistribution of potassium from petioles to blades did not fully explain growth.
- Taxon
- sugar beet plantsBeta vulgaris subsp. vulgarise1
- Organ / stage
- petioles to bladese0
- Outcome
- could not fully explain these resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Redistribution of K from petioles to blades could not fully explain these results”
e1“Sugar Beet Plants”
Claim · model-written summary
Rubidium significantly increased growth at small doses under low or adequate potassium.
- Taxon
- sugar beet plantsBeta vulgaris subsp. vulgarise1
- Treatment
- Rubidiume0
- Outcome
- growth of plantse0
- Direction
- increasede0
- Qualifier
- when supplied in small doses to a nutrient medium deficient or adequately supplied with Ke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rubidium increased the growth of plants significantly when supplied in small doses to a nutrient medium deficient or adequately supplied with K”
e1“Sugar Beet Plants”
Claim · model-written summary
High rubidium concentrations were toxic, especially to fibrous root growth.
- Taxon
- sugar beet plantsBeta vulgaris subsp. vulgarise1
- Organ / stage
- fibrous rootse0
- Treatment
- High Rb concentrationse0
- Outcome
- growth of fibrous rootse0
- Direction
- toxice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High Rb concentrations were toxic, especially to the growth of fibrous roots”
e1“Sugar Beet Plants”
Claim · model-written summary
Sodium or rubidium may be essential for sugar beet growth, pending conclusive criteria.
- Taxon
- sugar beetsBeta vulgaris subsp. vulgarise0
- Outcome
- growth of sugar beetse0
- Qualifier
- other criteria should be fulfilled also for conclusive proofe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Essentiality of either Na and/or Rb per se for growth of sugar beets may be inferred, but other criteria should be fulfilled also for conclusive proof”
Claim · model-written summary
Potassium dose and rubidium addition mode should be considered when assessing rubidium effects.
- Taxon
- sugar beet plantsBeta vulgaris subsp. vulgarise1
- Outcome
- should be carefully considerede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of K added and the mode of Rb addition to solution cultures should be carefully considered when studying the effect of Rb on growth”
e1“Sugar Beet Plants”
The same questions in other papers
sodium atom · growth · Beta vulgaris (beet)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
See all 7 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.