Abstract
Tobacco, with its substantial biomass and strong cadmium (Cd) enrichment capacity, is a potential candidate for phytoremediation of Cd-contaminated soil. However, its Cd accumulation characteristics under field conditions remain unclear. In this study, a field experiment (soil Cd concentration: 0.9 mg·kg⁻¹) demonstrated that the Cd accumulation per tobacco plant reached 1148.1 μg, with a dry biomass of 432.2 g in the mowing treatment. Cd was detected in all parts of the tobacco plant, with the highest concentration found in the leaf mesophyll (7.0 mg·kg⁻¹), and the predominant Cd chemical form was the less toxic NaCl-extractable fraction, which may be associated with the plant's Cd detoxification mechanism. Additionally, the Cd concentration was higher in the lateral roots than in the main roots, higher in the stem phloem than in the xylem, and a certain amount of Cd was also present in the flowers. Compared to 60 d after transplanting, the Cd concentrations in leaves, stems and roots, as well as the total and available Cd concentrations in rhizosphere soil, were significantly reduced at 180 d after transplanting. This decline may be attributed to Cd depletion in the rhizosphere soil and dilution effects caused by rapid plant growth. Nevertheless, the total Cd accumulation per plant at 180 d was significantly higher than that at 60 d. Mowing measures increased leaf dry biomass by 1.6 times, consequently enhancing total Cd accumulation by 1.6 times. These results provide a theoretical foundation for the practical application of tobacco in remediating Cd-contaminated soil.
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Claims 13
Claim · model-written summary
Mowed tobacco accumulated 1148.1 μg Cd per plant and had 432.2 g dry biomass.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- mowing treatmente0
- Outcome
- Cd accumulation per tobacco plante0
- Value
- 1148.1 μge0
- Qualifier
- 432.2 ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cd accumulation per tobacco plant reached 1148.1 μg, with a dry biomass of 432.2 g in the mowing treatment”
Claim · model-written summary
Mowed tobacco had dry biomass of 432.2 g.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- mowing treatmente0
- Outcome
- dry biomasse0
- Value
- 432.2 ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cd accumulation per tobacco plant reached 1148.1 μg, with a dry biomass of 432.2 g in the mowing treatment”
Claim · model-written summary
Cadmium was detected in all tobacco parts.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- Cd was detected in all partse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd was detected in all parts of the tobacco plant”
Claim · model-written summary
Leaf mesophyll had the highest cadmium concentration, 7.0 mg·kg⁻¹.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- leaf mesophylle0
- Outcome
- highest concentratione0
- Direction
- higheste0
- Value
- 7.0 mg·kg⁻¹e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest concentration found in the leaf mesophyll (7.0 mg·kg⁻¹)”
t0“tobacco”
Claim · model-written summary
The predominant cadmium form was the less toxic NaCl-extractable fraction.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- predominant Cd chemical forme0
- Qualifier
- less toxic NaCl-extractable fractione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the predominant Cd chemical form was the less toxic NaCl-extractable fraction”
t0“tobacco”
Claim · model-written summary
Cadmium concentration was higher in lateral roots than main roots.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- lateral rootse0
- Outcome
- Cd concentratione0
- Direction
- highere0
- Comparator
- main rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cd concentration was higher in the lateral roots than in the main roots”
t0“tobacco”
Claim · model-written summary
Cadmium concentration was higher in stem phloem than xylem.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- stem phloeme0
- Outcome
- Cd concentratione1
- Direction
- highere0
- Comparator
- xyleme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher in the stem phloem than in the xylem”
e1“the Cd concentration was higher in the lateral roots than in the main roots”
t0“tobacco”
Claim · model-written summary
Cadmium was also present in flowers.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- flowerse0
- Outcome
- Cd was also presente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a certain amount of Cd was also present in the flowers”
t0“tobacco”
Claim · model-written summary
Leaf, stem and root cadmium concentrations were significantly lower at 180 than 60 days after transplanting.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- Cd concentrations in leaves, stems and rootse0
- Direction
- reducede0
- Qualifier
- 180 d after transplantinge0
- Comparator
- 60 d after transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to 60 d after transplanting, the Cd concentrations in leaves, stems and roots, as well as the total and available Cd concentrations in rhizosphere soil, were significantly reduced at 180 d after transplanting.”
t0“tobacco”
Claim · model-written summary
Total and available rhizosphere soil cadmium concentrations were significantly lower at 180 than 60 days.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- total and available Cd concentrations in rhizosphere soile0
- Direction
- reducede0
- Qualifier
- 180 d after transplantinge0
- Comparator
- 60 d after transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to 60 d after transplanting, the Cd concentrations in leaves, stems and roots, as well as the total and available Cd concentrations in rhizosphere soil, were significantly reduced at 180 d after transplanting.”
t0“tobacco”
Claim · model-written summary
Total cadmium per plant was significantly higher at 180 than 60 days after transplanting.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- total Cd accumulation per plante0
- Direction
- highere0
- Qualifier
- 180 de0
- Comparator
- 60 de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total Cd accumulation per plant at 180 d was significantly higher than that at 60 d”
t0“tobacco”
Claim · model-written summary
Mowing increased leaf dry biomass 1.6 times.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Mowing measurese0
- Outcome
- leaf dry biomasse0
- Direction
- increasede0
- Value
- 1.6 timese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mowing measures increased leaf dry biomass by 1.6 times”
t0“tobacco”
Claim · model-written summary
Mowing enhanced total cadmium accumulation 1.6 times.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Mowing measurese0
- Outcome
- total Cd accumulatione0
- Direction
- enhancinge0
- Value
- 1.6 timese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mowing measures increased leaf dry biomass by 1.6 times, consequently enhancing total Cd accumulation by 1.6 times”
t0“tobacco”
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- no effect
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- no effect
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See all 18 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.