Abstract
Alfalfa and subterranean clover plants were grown in highly purified nutrient solutions to which selenite selenium had been added at 0, 0.025, 0.25, 2.5 or 25.0 mug-atoms/liter. In both species, yields of tops and roots were significantly less at 25.0 mug-atoms/liter than at lower selenium concentrations (p < 0.01). The results indicated that growth was adversely affected when the concentration of selenium in mature leaf tissue reached 0.2 to 0.8 mug-atom/g dry weight.No beneficial effect of selenium was demonstrated on the growth of either species. If selenium is required by these species, the critical level will probably be below 0.001 mug-atom/g of dry plant material. Results are discussed in relation to earlier work on the selenium nutrition of plants.
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Claims 6
Claim · model-written summary
Alfalfa top and root yields were significantly lower at the highest selenium supply.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- 25.0 mug-atoms/litere0
- Outcome
- yields of tops and rootse0
- Direction
- lesse0
- Comparator
- lower selenium concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, yields of tops and roots were significantly less at 25.0 mug-atoms/liter than at lower selenium concentrations (p < 0.01)”
t0“Alfalfa and Subterranean Clover”
Claim · model-written summary
Subterranean clover top and root yields were significantly lower at the highest selenium supply.
- Taxon
- Subterranean Clover
Trifolium subterraneumt0 - Treatment
- 25.0 mug-atoms/litere0
- Outcome
- yields of tops and rootse0
- Direction
- lesse0
- Comparator
- lower selenium concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both species, yields of tops and roots were significantly less at 25.0 mug-atoms/liter than at lower selenium concentrations (p < 0.01)”
t0“Alfalfa and Subterranean Clover”
Claim · model-written summary
Plant growth was adversely affected at mature leaf selenium concentrations of 0.2 to 0.8 mug-atom/g dry weight.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- mature leaf tissuee0
- Compound
- seleniume0
- Outcome
- growthe0
- Direction
- adversely affectede0
- Value
- 0.2 to 0.8 mug-atom/g dry weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth was adversely affected when the concentration of selenium in mature leaf tissue reached 0.2 to 0.8 mug-atom/g dry weight”
t0“Alfalfa and Subterranean Clover”
Claim · model-written summary
No growth benefit of selenium was demonstrated in alfalfa.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- seleniume0
- Outcome
- growthe0
- Direction
- No beneficial effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No beneficial effect of selenium was demonstrated on the growth of either species”
t0“Alfalfa and Subterranean Clover”
Claim · model-written summary
No growth benefit of selenium was demonstrated in subterranean clover.
- Taxon
- Subterranean CloverTrifolium subterraneumt0
- Treatment
- seleniume0
- Outcome
- growthe0
- Direction
- No beneficial effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No beneficial effect of selenium was demonstrated on the growth of either species”
t0“Alfalfa and Subterranean Clover”
Claim · model-written summary
The authors suggest any critical selenium requirement is probably below 0.001 mug-atom/g dry plant material.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- critical levele0
- Direction
- belowe0
- Value
- 0.001 mug-atom/g of dry plant materiale0
- Qualifier
- If selenium is required by these speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If selenium is required by these species, the critical level will probably be below 0.001 mug-atom/g of dry plant material”
t0“Alfalfa and Subterranean Clover”
The same questions in other papers
selenium atom · growth · Medicago sativa (alfalfa)Results differ
4 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 papers →selenium atom · growth · Trifolium subterraneumResults agree
1 paper in the same direction as this paper
- no effect
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.