Abstract
Chemical speciation of metals in soil/solution plays an important role in determining their biogeochemical behavior in soil-plant system. The current study evaluated the influence of applied form of Pb (metal speciation) on its toxicity to metal sensitive Vicia faba L. roots. Lead was applied to young V. faba seedlings alone or chelated by organic ligands (citric acid and ethylenediaminetetraacetic acid). Plants were exposed to all treatments for 1, 4, 8, 12, and 24 h in nutrient solution, and contents of H 2 O 2 and thiobarbituric-acid-reactive substances (TBARS) production were analyzed in V. faba roots. The results showed that Pb toxicity to V. faba roots depended on its applied chemical form and duration of exposure. Lead alone caused two burst of lipid peroxidation and H 2 O 2 induction at 1 h and 12 h. Addition of EDTA dose-dependently inhibited Pb-induced H 2 O 2 and TBARS production, indicating a protective role of this chelator against Pb toxicity during the first 24 h. In contrast, citric acid did not show significant effects on Pb-induced H 2 O 2 and TBARS production, but delayed the induction of these effects. This study suggested that Pb toxicity to V. faba roots varies with Pb speciation in growth medium.
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Claims 7
Claim · model-written summary
Pb toxicity to Vicia faba roots varied with chemical form and exposure duration.
- Taxon
- Vicia faba
Vicia fabat0 - Treatment
- applied chemical forme0
- Outcome
- Pb toxicity to V. faba rootse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that Pb toxicity to V. faba roots depended on its applied chemical form and duration of exposure.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
Claim · model-written summary
Lead alone induced two bursts of root lipid peroxidation at 1 h and 12 h.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- Lead alonee0
- Outcome
- lipid peroxidatione0
- Direction
- causede0
- Value
- 1 h and 12 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lead alone caused two burst of lipid peroxidation and H 2 O 2 induction at 1 h and 12 h.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
Claim · model-written summary
Lead alone induced H 2 O 2 at 1 h and 12 h.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- Lead alonee0
- Outcome
- H 2 O 2 inductione0
- Direction
- inductione0
- Value
- 1 h and 12 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lead alone caused two burst of lipid peroxidation and H 2 O 2 induction at 1 h and 12 h.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
Claim · model-written summary
EDTA dose-dependently inhibited Pb-induced H 2 O 2 production.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- Addition of EDTAe0
- Outcome
- Pb-induced H 2 O 2e0
- Direction
- inhibitede0
- Qualifier
- during the first 24 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of EDTA dose-dependently inhibited Pb-induced H 2 O 2 and TBARS production, indicating a protective role of this chelator against Pb toxicity during the first 24 h.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
Claim · model-written summary
EDTA dose-dependently inhibited Pb-induced TBARS production.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- Addition of EDTAe0
- Outcome
- TBARS productione0
- Direction
- inhibitede0
- Qualifier
- during the first 24 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of EDTA dose-dependently inhibited Pb-induced H 2 O 2 and TBARS production, indicating a protective role of this chelator against Pb toxicity during the first 24 h.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
Claim · model-written summary
Citric acid did not significantly affect Pb-induced H 2 O 2 and TBARS production.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- citric acide0
- Outcome
- Pb-induced H 2 O 2 and TBARS productione0
- Direction
- did not show significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“citric acid did not show significant effects on Pb-induced H 2 O 2 and TBARS production, but delayed the induction of these effects.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
Claim · model-written summary
Citric acid delayed induction of Pb-induced oxidative effects.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- citric acide0
- Outcome
- induction of these effectse0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“citric acid did not show significant effects on Pb-induced H 2 O 2 and TBARS production, but delayed the induction of these effects.”
t0“Role of metal speciation in lead-induced oxidative stress to Vicia faba roots”
The same questions in other papers
lead atom · physiology: oxidative · Vicia faba (faba bean)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.