Abstract
The changes in lipid peroxidation, antioxidative enzyme activity, H2O2 level, and cell wall peroxidase activity in Cu-stressed roots of rice seedlings and their relation with root growth inhibition were investigated. CuSO4 was effective in inhibiting root growth but not shoot growth. Treatment with CuSO4 resulted in an increase in lipid peroxidation and modulated antioxidative enzyme activities in rice roots. CuSO4 increased the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and peroxidase, but had no effect on catalase. CuSO4 also increased H2O2 level and cell wall peroxidase in roots of rice seedlings. Exogenous application of H2O2 resulted in an inhibition of root growth. It appears that growth inhibition of root caused by Cu is associated with H2O2 dependent peroxidase-catalyzed formation of cross-linking among cell wall polymers.
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Claims 10
Claim · model-written summary
CuSO4 inhibited rice root growth.
- Taxon
- rice
Oryza sativat0 - Treatment
- CuSO4e0
- Outcome
- root growthe0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuSO4 was effective in inhibiting root growth but not shoot growth”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
Claim · model-written summary
CuSO4 did not inhibit shoot growth.
- Taxon
- riceOryza sativat0
- Treatment
- CuSO4e0
- Outcome
- shoot growthe0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuSO4 was effective in inhibiting root growth but not shoot growth”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
Claim · model-written summary
CuSO4 increased lipid peroxidation in rice roots.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Treatment
- CuSO4e0
- Outcome
- lipid peroxidatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with CuSO4 resulted in an increase in lipid peroxidation and modulated antioxidative enzyme activities in rice roots”
Claim · model-written summary
CuSO4 modulated antioxidative enzyme activities in rice roots.
- Taxon
- riceOryza sativae0
- Treatment
- CuSO4e0
- Outcome
- antioxidative enzyme activitiese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with CuSO4 resulted in an increase in lipid peroxidation and modulated antioxidative enzyme activities in rice roots”
Claim · model-written summary
CuSO4 increased superoxide dismutase, ascorbate peroxidase and glutathione reductase activities.
- Taxon
- riceOryza sativat0
- Treatment
- CuSO4e0
- Outcome
- activities of superoxide dismutase, ascorbate peroxidase, glutathione reductasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuSO4 increased the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and peroxidase”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
Claim · model-written summary
CuSO4 increased peroxidase activity.
- Taxon
- riceOryza sativat0
- Treatment
- CuSO4e0
- Outcome
- peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuSO4 increased the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and peroxidase”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
Claim · model-written summary
CuSO4 had no effect on catalase.
- Taxon
- riceOryza sativat0
- Treatment
- CuSO4e0
- Outcome
- catalasee0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuSO4 increased the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and peroxidase, but had no effect on catalase”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
Claim · model-written summary
CuSO4 increased H2O2 level and cell wall peroxidase in rice roots.
- Taxon
- riceOryza sativae0
- Organ / stage
- rootse0
- Treatment
- CuSO4e0
- Outcome
- H2O2 level and cell wall peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CuSO4 also increased H2O2 level and cell wall peroxidase in roots of rice seedlings”
Claim · model-written summary
Exogenous H2O2 inhibited root growth.
- Taxon
- riceOryza sativat0
- Treatment
- Exogenous application of H2O2e0
- Outcome
- root growthe0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of H2O2 resulted in an inhibition of root growth”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
Claim · model-written summary
The authors associated Cu-caused root inhibition with H2O2-dependent peroxidase cross-linking of cell wall polymers.
- Taxon
- riceOryza sativat0
- Gene
- peroxidasee0
- Compound
- H2O2e0
- Outcome
- growth inhibition of roote0
- Qualifier
- cross-linking among cell wall polymerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth inhibition of root caused by Cu is associated with H2O2 dependent peroxidase-catalyzed formation of cross-linking among cell wall polymers”
t0“Copper toxicity in rice seedlings: Changes in antioxidative enzyme activities, H2O2 level, and cell wall peroxidase activity in roots”
The same questions in other papers
hydrogen peroxide · growth · Oryza sativa (rice)Results differ
4 papers in the same direction as this paper · 17 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 papers →copper(II) sulfate · growth · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.