Abstract
Environmental pollution with arsenic (As) in croplands causes agricultural and health problems worldwide. Rice is an important crop in South Korea, and many studies have evaluated the relationship between As and glutathione (GSH) to alleviate As uptake from the soil into plants. However, information about the relationship between As and ascorbate (AsA) in rice seedlings is still limited with regard to As phytotoxicity. We therefore investigated changes in reactive oxygen species (ROS) and antioxidant levels in rice (Oryza sativa L. cv 'Dasan') seedlings with toxic As and/or AsA application. The exposure of rice seedlings to 15 M As inhibited plant growth and resulted in increased contents of superoxide, hydrogen peroxide, and malondialdehyde, and induced As uptake by the roots and leaves. Application of AsA to As-exposed seedlings ameliorated As-induced oxidative stress by enhancing the capacity of AsA-GSH cycle in applied plants and increasing As transfer from the roots to leaves. These results suggest that AsA application alleviated As-induced oxidative damage by maintaining sufficient levels of AsA and GSH.
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Claims 7
Claim · model-written summary
Arsenic exposure inhibited rice seedling growth.
- Taxon
- rice
Oryza sativae0 - Treatment
- 15 M Ase0
- Outcome
- plant growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exposure of rice seedlings to 15 M As inhibited plant growth”
Claim · model-written summary
Arsenic exposure increased superoxide, hydrogen peroxide and malondialdehyde content.
- Taxon
- riceOryza sativae0
- Treatment
- 15 M Ase0
- Outcome
- contents of superoxide, hydrogen peroxide, and malondialdehydee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exposure of rice seedlings to 15 M As inhibited plant growth and resulted in increased contents of superoxide, hydrogen peroxide, and malondialdehyde”
Claim · model-written summary
Arsenic exposure induced arsenic uptake in roots and leaves.
- Taxon
- riceOryza sativae0
- Treatment
- 15 M Ase0
- Outcome
- As uptake by the roots and leavese0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exposure of rice seedlings to 15 M As inhibited plant growth and resulted in increased contents of superoxide, hydrogen peroxide, and malondialdehyde, and induced As uptake by the roots and leaves.”
Claim · model-written summary
Ascorbate application ameliorated arsenic-induced oxidative stress.
Not reportedTaxonComparator
Verbatim
e0“Application of AsA to As-exposed seedlings ameliorated As-induced oxidative stress by enhancing the capacity of AsA-GSH cycle in applied plants and increasing As transfer from the roots to leaves.”
t0“Rice”
Claim · model-written summary
Ascorbate application enhanced AsA-GSH cycle capacity.
Not reportedTaxonComparator
Verbatim
e0“Application of AsA to As-exposed seedlings ameliorated As-induced oxidative stress by enhancing the capacity of AsA-GSH cycle in applied plants and increasing As transfer from the roots to leaves.”
t0“Rice”
Claim · model-written summary
Ascorbate application increased arsenic transfer from roots to leaves.
Not reportedTaxonComparator
Verbatim
e0“Application of AsA to As-exposed seedlings ameliorated As-induced oxidative stress by enhancing the capacity of AsA-GSH cycle in applied plants and increasing As transfer from the roots to leaves.”
t0“Rice”
Claim · model-written summary
The authors infer that ascorbate alleviated oxidative damage by maintaining ascorbate and glutathione levels.
- Treatment
- AsA applicatione0
- Outcome
- As-induced oxidative damagee0
- Qualifier
- maintaining sufficient levels of AsA and GSHe0
Not reportedTaxon
Verbatim
e0“AsA application alleviated As-induced oxidative damage by maintaining sufficient levels of AsA and GSH.”
t0“Rice”
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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.