Abstract
ABSTRACT Lead is a toxic metal that affects plant growth and the ecosystem. This study evaluated the lead (Pb) bioaccumulation potential of vetiver (Vetiveria zizanioides L.), sunflower (Helianthus annuus L.), elephant ear (Alocasia macrorrhiza) and ‘embaúba’ (Cecropia sp.). The plant species were tested in a 50% nutrient solution - Hoagland and Arnon, constantly aerated, containing five Pb concentrations: 0, 50, 100, 200 and 400 mg L-1). The treatments were arranged in a completely randomized design in a 4 x 5 factorial scheme, with four replicates. The Pb contents in the plants increased linearly with the Pb exposure concentration. Vetiver was the species with the highest Pb content in the shoots (260.24 mg kg-1) and sunflower, in the roots (44925.20 mg kg-1). Pb concentration of up to 100 and 50.9 mg L-1 stimulated sunflower biomass and root length, respectively. None of the evaluated species met the hyperaccumulator criterion; however, sunflower and vetiver have the potential to be tested for phytostabilization purposes.
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Claims 7
Claim · model-written summary
Plant lead content rose linearly with exposure concentration.
- Taxon
- plantsViridiplantaee0
- Treatment
- Pb exposure concentratione0
- Outcome
- Pb contentse0
- Direction
- increased linearlye0
Verbatim
e0“The Pb contents in the plants increased linearly with the Pb exposure concentration.”
Claim · model-written summary
Vetiver had the highest shoot lead content, 260.24 mg kg-1.
- Taxon
- Vetiver
Chrysopogon zizanioidese0 - Organ / stage
- shootse0
- Outcome
- Pb contente0
- Direction
- higheste0
- Value
- 260.24 mg kg-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vetiver was the species with the highest Pb content in the shoots (260.24 mg kg-1)”
Claim · model-written summary
Sunflower had the highest root lead content, 44925.20 mg kg-1.
- Taxon
- sunflower
Helianthus annuuse0 - Outcome
- rootse0
- Value
- 44925.20 mg kg-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower, in the roots (44925.20 mg kg-1)”
Claim · model-written summary
Lead concentrations up to 100 mg L-1 stimulated sunflower biomass.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- Pb concentration of up to 100e0
- Outcome
- biomasse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pb concentration of up to 100 and 50.9 mg L-1 stimulated sunflower biomass and root length, respectively.”
Claim · model-written summary
Lead concentration of 50.9 mg L-1 stimulated sunflower root length.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 50.9 mg L-1e0
- Outcome
- root lengthe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pb concentration of up to 100 and 50.9 mg L-1 stimulated sunflower biomass and root length, respectively.”
Claim · model-written summary
None of the four species met the hyperaccumulator criterion.
Verbatim
e0“None of the evaluated species met the hyperaccumulator criterion”
Claim · model-written summary
Sunflower and vetiver were proposed for phytostabilization testing.
- Taxon
- sunflower and vetiverHelianthus annuusChrysopogon zizanioidese0
- Outcome
- phytostabilization purposese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sunflower and vetiver have the potential to be tested for phytostabilization purposes.”
The same questions in other papers
lead atom · growth · Helianthus annuus (common sunflower)Results differ
2 papers in the same direction as this paper · 11 in the opposite direction
- negative
- negative
- negative
10 papers more in this group
See all 14 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.