Abstract
Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB simulating level predicted to occur with 25% stratospheric ozone depletion. Membrane permeability of leaf tissue, as quantified by measurement of electrolyte leakage, was obviously increased by UVB irradiation. The net rate of superoxide radical (O 2 · ) production and malondialdehyde(MDA) content were markedly enhanced by UVB exposure. Protective enzymes against activated oxygen ,including superoxide dismutase(SOD), catalase (CAT) and peroxidase( POD), were decreased in leaves of seedlings treated by long term's UVB exposure. It may be concluded that UVB injury to membrane was correlated to O 2 · accumulation which promoted lipid peroxidation, while excessive O 2 · production may be caused by the inhibition of protective enzymes against activated oxygen.
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Claims 6
Claim · model-written summary
UVB increased leaf membrane permeability.
- Taxon
- Rice
Oryza sativae0 - Treatment
- UVB irradiatione1
- Outcome
- Membrane permeability of leaf tissuee1
- Direction
- increasede1
- Value
- 13.56 kJ m -2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB”
e1“Membrane permeability of leaf tissue, as quantified by measurement of electrolyte leakage, was obviously increased by UVB irradiation”
Claim · model-written summary
UVB enhanced the rate of superoxide radical production.
- Taxon
- RiceOryza sativae0
- Treatment
- UVB exposuree1
- Outcome
- net rate of superoxide radical (O 2 · ) productione1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB”
e1“The net rate of superoxide radical (O 2 · ) production and malondialdehyde(MDA) content were markedly enhanced by UVB exposure”
Claim · model-written summary
UVB enhanced malondialdehyde content.
- Taxon
- RiceOryza sativae0
- Treatment
- UVB exposuree1
- Outcome
- malondialdehyde(MDA) contente1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB”
e1“malondialdehyde(MDA) content were markedly enhanced by UVB exposure”
Claim · model-written summary
Long-term UVB lowered protective enzyme levels in leaves.
- Taxon
- RiceOryza sativae0
- Treatment
- long term's UVB exposuree1
- Outcome
- Protective enzymes against activated oxygen ,including superoxide dismutase(SOD), catalase (CAT) and peroxidase( POD)e1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB”
e1“Protective enzymes against activated oxygen ,including superoxide dismutase(SOD), catalase (CAT) and peroxidase( POD), were decreased in leaves of seedlings treated by long term's UVB exposure”
Claim · model-written summary
The authors link membrane injury to superoxide accumulation and lipid peroxidation.
- Taxon
- RiceOryza sativae0
- Outcome
- UVB injury to membranee1
- Qualifier
- O 2 · accumulation which promoted lipid peroxidatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB”
e1“UVB injury to membrane was correlated to O 2 · accumulation which promoted lipid peroxidation”
Claim · model-written summary
The authors suggest inhibition of protective enzymes may cause excess superoxide production.
- Taxon
- RiceOryza sativae0
- Outcome
- excessive O 2 · productione1
- Qualifier
- inhibition of protective enzymes against activated oxygene1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice(Oryza sativa L.) seedlings were grown with 13.56 kJ m -2 UVB”
e1“excessive O 2 · production may be caused by the inhibition of protective enzymes against activated oxygen”
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See all 12 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.