Abstract
Abstract Contamination by heavy metals (HM) is a global concern due to their impact on terrestrial and aquatic environments. This question has great relevance in agricultural areas due to excessive chemical fertilization. In this sense, Cd is a toxic element that can reach agricultural soils through chemical fertilization or sewage sludges. Tobacco plants ( Nicotiana tabacum L.) can uptake and accumulate Cd in their tissues, and therefore, an increased risk for human health due to tobacco consumption. This study was performed to evaluate the response of tobacco plants to a single and combined amendment of Cd and Zn on agricultural soil with a pot experiment. A factorial experiment was performed with four Cd levels (0, 25, 50 and 100 mg kg -1 ) and three Zn levels (0, 15 and 25 mg kg -1 ). Growth, Cd and Zn bioaccumulation and nutrient uptake parameters were assessed. The results revealed that during the tobacco growth, Cd was bioaccumulated on roots (translocation factor <1), while Zn was bioaccumulated on the aerial part (TF>1). Besides, the Zn amendment significantly decreased the Cd uptake and accumulation, especially under intermediate doses (15 mg kg -1 Zn). Zinc amendments could be helpful as a mitigation measure for Cd uptake in tobacco plants and, therefore, for health risk reduction.
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Claims 4
Claim · model-written summary
Cd accumulated in tobacco roots during growth.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- rootse0
- Outcome
- Cd was bioaccumulated on rootse0
- Value
- translocation factor <1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during the tobacco growth, Cd was bioaccumulated on roots (translocation factor <1)”
Claim · model-written summary
Zn accumulated in the tobacco aerial part.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- aerial parte0
- Outcome
- Zn was bioaccumulated on the aerial parte0
- Value
- TF>1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn was bioaccumulated on the aerial part (TF>1)”
t0“Tobacco Plants”
Claim · model-written summary
Zn amendment significantly decreased Cd uptake and accumulation, particularly at 15 mg kg -1 Zn.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Zn amendmente0
- Outcome
- Cd uptake and accumulatione0
- Direction
- decreasede0
- Qualifier
- 15 mg kg -1 Zne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn amendment significantly decreased the Cd uptake and accumulation, especially under intermediate doses (15 mg kg -1 Zn)”
t0“Tobacco Plants”
Claim · model-written summary
The authors propose zinc amendments to mitigate Cd uptake in tobacco.
- Taxon
- tobacco plantsNicotiana tabacume0
- Outcome
- Zinc amendments could be helpful as a mitigation measure for Cd uptakee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc amendments could be helpful as a mitigation measure for Cd uptake in tobacco plants”
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See all 17 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.