Abstract
Abstract Effect of calcium and magnesium on zinc absorption by 21‐day‐old rice seedlings and its translocation within the plants was studied in the nutrient solution culture using radioactive zinc. The concentrations of the elements in the nutrient solution were 0.5, 1.0 and 2.0 μM zinc and 0, 10 and 20 mM calcium and magnesium. Absorption of 65zinc was studied for 30, 60 and 90 minutes and translocation for 24 hours. Zinc absorption increased with time and increased zinc concentration in the nutrient solutions. Addition of calcium and magnesium reduced zinc absorption by rice seedlings by about 60 and 90% respectively at a concentration of 20 mM. The nature of inhibition of both calcium and magnesium on zinc was non‐competitive as indicated by Michaelis constants. A large fraction of zinc absorbed remained in roots and only 5.3% was translocated to shoots even at 2.0 #GMM zinc concentrations in solution. The effect of cations on translocation of 65zinc within rice seedlings was more at lower( 0.5 μM zinc) than at higher (2.0 μM zinc) concentrations.
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Claims 8
Claim · model-written summary
Zinc absorption increased over time.
- Taxon
- rice seedlings
Oryza sativat0 - Treatment
- timee0
- Outcome
- Zinc absorptione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc absorption increased with time and increased zinc concentration in the nutrient solutions.”
t0“rice seedlings”
Claim · model-written summary
Zinc absorption increased with nutrient solution zinc concentration.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- increased zinc concentratione0
- Outcome
- Zinc absorptione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc absorption increased with time and increased zinc concentration in the nutrient solutions.”
t0“rice seedlings”
Claim · model-written summary
At 20 mM, calcium reduced zinc absorption by about 60%.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- calciume0
- Outcome
- zinc absorptione0
- Direction
- reducede0
- Value
- about 60e0
- Qualifier
- at a concentration of 20 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of calcium and magnesium reduced zinc absorption by rice seedlings by about 60 and 90% respectively at a concentration of 20 mM.”
Claim · model-written summary
At 20 mM, magnesium reduced zinc absorption by about 90%.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- magnesiume0
- Outcome
- zinc absorptione0
- Direction
- reducede0
- Value
- 90%e0
- Qualifier
- at a concentration of 20 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of calcium and magnesium reduced zinc absorption by rice seedlings by about 60 and 90% respectively at a concentration of 20 mM.”
Claim · model-written summary
Calcium inhibition of zinc absorption was noncompetitive.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- calciume0
- Outcome
- inhibition of both calcium and magnesium on zinc was non‐competitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nature of inhibition of both calcium and magnesium on zinc was non‐competitive as indicated by Michaelis constants.”
t0“rice seedlings”
Claim · model-written summary
Magnesium inhibition of zinc absorption was noncompetitive.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- magnesiume0
- Outcome
- inhibition of both calcium and magnesium on zinc was non‐competitivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nature of inhibition of both calcium and magnesium on zinc was non‐competitive as indicated by Michaelis constants.”
t0“rice seedlings”
Claim · model-written summary
Most absorbed zinc remained in roots and only 5.3% moved to shoots.
- Taxon
- rice seedlingsOryza sativat0
- Organ / stage
- shootse0
- Outcome
- translocated to shootse0
- Value
- 5.3%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A large fraction of zinc absorbed remained in roots and only 5.3% was translocated to shoots even at 2.0 #GMM zinc concentrations in solution.”
t0“rice seedlings”
Claim · model-written summary
Cations affected zinc translocation more at 0.5 μM zinc than at 2.0 μM.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- cationse0
- Outcome
- translocation of 65zince0
- Direction
- moree0
- Comparator
- higher (2.0 μM zinc) concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of cations on translocation of 65zinc within rice seedlings was more at lower( 0.5 μM zinc) than at higher (2.0 μM zinc) concentrations.”
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See all 28 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.