Abstract
The aim of this present study was to determine the effects of heavy metals (Cd, Cu and Zn) on plant growth, tissue concentration and examine their uptake by sunflower in soil. Three experiments (each corresponding to each metal) in a greenhouse were carried out in a complete randomized design, in each experiment, with five treatments and three replications, totaling 15 experimental units. Cadmium was applied at the rate of 0; 10; 20; 30 and 40 mg dm-3 of soil; copper and zinc levels were 0; 20; 40; 60 and 80 mg dm-3 of soil. Plant tops were harvested from 50 days after sowing. Cadmium and Zn both reduced the plant height of sunflower plant at higher concentration. The higher concentrations of Zn showed a significant decrease in leaf area. The heavy metals have no significant effect on plant dry matter but had significant effect on the accumulation of these elements in the plant parts, stem, leaves and roots.
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Claims 5
Claim · model-written summary
Higher cadmium concentrations reduced sunflower height.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- Cadmiume0
- Outcome
- plant heighte0
- Direction
- reducede0
- Qualifier
- at higher concentratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium and Zn both reduced the plant height of sunflower plant at higher concentration.”
Claim · model-written summary
Higher zinc concentrations reduced sunflower height.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- Zne0
- Outcome
- plant heighte0
- Direction
- reducede0
- Qualifier
- at higher concentratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cadmium and Zn both reduced the plant height of sunflower plant at higher concentration.”
Claim · model-written summary
Higher zinc concentrations significantly decreased sunflower leaf area.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- higher concentrations of Zne0
- Outcome
- leaf areae0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher concentrations of Zn showed a significant decrease in leaf area.”
e1“sunflower in soil”
Claim · model-written summary
The tested heavy metals had no significant effect on sunflower dry matter.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- heavy metalse0
- Outcome
- plant dry mattere0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The heavy metals have no significant effect on plant dry matter”
e1“sunflower in soil”
Claim · model-written summary
The tested heavy metals significantly affected accumulation in sunflower stems, leaves and roots.
- Taxon
- sunflowerHelianthus annuuse2
- Organ / stage
- stem, leaves and rootse0
- Treatment
- heavy metalse1
- Outcome
- accumulation of these elementse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had significant effect on the accumulation of these elements in the plant parts, stem, leaves and roots.”
e1“The heavy metals have no significant effect on plant dry matter”
e2“sunflower in soil”
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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.