Abstract
In this study, different soil Pb concentrations [24 (control), 80, 136, 362, and 1150 mg kg−1] were used to analyze the tolerance threshold and accumulation potential of Brassica juncea L. in a pot experiment under greenhouse conditions. In addition to growth and Pb accumulation, the following contamination indices were calculated: transfer coefficient (TC), translocation factor (TF), and tolerance index (TI). Growth and Pb accumulation were determined at 60 days after emergence. The Pb concentrations were determined using the flame atomic absorption spectrometry (FAAS). The plant height was affected by soil Pb contamination, and it decreased from 1.37 to 0.83 m when the soil Pb concentration increased from 24 (control) to 1150 mg kg−1, respectively. The Pb concentration in the shoots and roots increased as the Pb concentration in the soil increased, reaching 94 mg kg−1 in shoots and 783 mg kg−1 in roots when was grown under 1150 mg kg−1 of Pb. TF was <1 at all levels of contamination. The TI values suggested that B. juncea presented Pb tolerance in Pb contaminated soils. Our findings indicate that B. juncea has the potential to accumulate Pb in soil under tropical conditions.
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Claims 6
Claim · model-written summary
Plant height declined from 1.37 to 0.83 m as soil Pb increased from 24 to 1150 mg kg−1.
- Taxon
- Brassica juncea L.
Brassica junceat0 - Treatment
- soil Pb contaminatione0
- Outcome
- plant heighte0
- Direction
- decreasede0
- Value
- 1.37 to 0.83 me0
- Qualifier
- 1150 mg kg−1e0
- Comparator
- 24 (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plant height was affected by soil Pb contamination, and it decreased from 1.37 to 0.83 m when the soil Pb concentration increased from 24 (control) to 1150 mg kg−1, respectively.”
t0“Brassica juncea L.”
Claim · model-written summary
Shoot Pb concentration rose with soil Pb, reaching 94 mg kg−1 at 1150 mg kg−1 soil Pb.
- Taxon
- Brassica juncea L.Brassica junceat0
- Organ / stage
- shootse0
- Treatment
- 1150 mg kg−1 of Pbe0
- Outcome
- Pb concentration in the shootse0
- Direction
- increasede0
- Value
- 94 mg kg−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Pb concentration in the shoots and roots increased as the Pb concentration in the soil increased, reaching 94 mg kg−1 in shoots and 783 mg kg−1 in roots when was grown under 1150 mg kg−1 of Pb.”
t0“Brassica juncea L.”
Claim · model-written summary
Root Pb concentration rose with soil Pb, reaching 783 mg kg−1 at 1150 mg kg−1 soil Pb.
- Taxon
- Brassica juncea L.Brassica junceat0
- Organ / stage
- rootse0
- Treatment
- 1150 mg kg−1 of Pbe0
- Outcome
- Pb concentration in the shoots and rootse0
- Direction
- increasede0
- Value
- 783 mg kg−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Pb concentration in the shoots and roots increased as the Pb concentration in the soil increased, reaching 94 mg kg−1 in shoots and 783 mg kg−1 in roots when was grown under 1150 mg kg−1 of Pb.”
t0“Brassica juncea L.”
Claim · model-written summary
The translocation factor was below one at every soil contamination level.
- Taxon
- Brassica juncea L.Brassica junceat0
- Outcome
- TFe0
- Value
- <1e0
- Qualifier
- at all levels of contaminatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TF was <1 at all levels of contamination.”
t0“Brassica juncea L.”
Claim · model-written summary
Tolerance index values suggested lead tolerance in contaminated soils.
- Taxon
- B. junceaBrassica junceae0
- Outcome
- Pb tolerancee0
- Qualifier
- Pb contaminated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The TI values suggested that B. juncea presented Pb tolerance in Pb contaminated soils.”
Claim · model-written summary
The authors conclude B. juncea could accumulate soil Pb under tropical conditions.
- Taxon
- B. junceaBrassica junceae0
- Outcome
- potential to accumulate Pb in soile0
- Setting
- tropical conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our findings indicate that B. juncea has the potential to accumulate Pb in soil under tropical conditions.”
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