Abstract
Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations. Based on measurements of shoot and root length and dry weight, copper was found to be already toxic at 10 μM, while Zn became toxic at 100 μM. At Cu and Zn levels found to induce a similar level of growth inhibiton, the influence of increasing the supply of K, Ca and Mg was investigated. Increasing the concentration of both Ca and Mg in the nutrient solution attenuated the degree of inhibition of root growth by Zn, but not Cu. Potassium did not affect the toxicity of either Cu or Zn. An increase in Ca decreased the level of both Cu and Zn in roots. Magnesium ameliorated the toxicity effects of Zn without effecting the Zn concentration in the roots. Treatment with Zn significantly decreased the concentration of Mg in the roots. An increased supply of Mg lowered the percentage decrease in root Mg concentration due to Zn toxicity. The maintenance of an adequate Mg level in the roots may be critical to prevent Zn induced inhibition of root growth.
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Claims 9
Claim · model-written summary
Copper was already toxic to sugar beet seedlings at 10 μM.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Compound
- coppere1
- Outcome
- already toxice1
- Value
- 10 μMe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e1“copper was found to be already toxic at 10 μM”
Claim · model-written summary
Zn became toxic to sugar beet seedlings at 100 μM.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Compound
- Zne2
- Outcome
- became toxice2
- Value
- 100 μMe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e2“Zn became toxic at 100 μM”
Claim · model-written summary
Raising Ca and Mg supply attenuated Zn-induced inhibition of root growth.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Increasing the concentration of both Ca and Mg in the nutrient solutione3
- Outcome
- degree of inhibition of root growth by Zne3
- Direction
- attenuatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e3“Increasing the concentration of both Ca and Mg in the nutrient solution attenuated the degree of inhibition of root growth by Zn, but not Cu”
Claim · model-written summary
Raising Ca and Mg supply did not change Cu-induced inhibition of root growth.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Increasing the concentration of both Ca and Mg in the nutrient solutione3
- Compound
- Cue3
- Outcome
- inhibition of root growthe3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e3“Increasing the concentration of both Ca and Mg in the nutrient solution attenuated the degree of inhibition of root growth by Zn, but not Cu”
Claim · model-written summary
An increase in Ca decreased the level of both Cu and Zn in roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- An increase in Cae4
- Outcome
- level of both Cu and Zn in rootse4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e4“An increase in Ca decreased the level of both Cu and Zn in roots”
Claim · model-written summary
Magnesium ameliorated the toxicity effects of Zn without changing root Zn concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Magnesiume5
- Outcome
- toxicity effects of Zne5
- Direction
- amelioratede5
- Qualifier
- without effecting the Zn concentration in the rootse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e5“Magnesium ameliorated the toxicity effects of Zn without effecting the Zn concentration in the roots”
Claim · model-written summary
Zn treatment significantly decreased root Mg concentration in sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Treatment with Zne6
- Outcome
- concentration of Mg in the rootse6
- Direction
- decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e6“Treatment with Zn significantly decreased the concentration of Mg in the roots”
Claim · model-written summary
An increased Mg supply lowered the percentage decrease in root Mg concentration caused by Zn toxicity.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- An increased supply of Mge7
- Outcome
- percentage decrease in root Mg concentration due to Zn toxicitye7
- Direction
- lowerede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e7“An increased supply of Mg lowered the percentage decrease in root Mg concentration due to Zn toxicity”
Claim · model-written summary
Potassium supply did not affect Cu or Zn toxicity in sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Potassiume5
- Outcome
- toxicity of either Cu or Zne5
- Direction
- did not affecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of sugar beet (Beta vulgaris) were grown in nutrient solutions containing a range of Cu and Zn concentrations”
e5“Potassium did not affect the toxicity of either Cu or Zn”
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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.