Abstract
After 12 h of chilling stress at 6℃,pretreatment with H2O2 0～20 mmol·L-1 as foliar spray under normal growth conditions was measured.The results indicated that 0～8 mmol·L-1 H2O2 could significantly enhance relative water content (RWC) and decrease relative membrane penetration.The obvious effect of H2O2 occurred at 4 mmol·L-1.After chilling stress,compared with water-treated seedlings (contro1),4 mmol·L-1 H2O2 pretreatment relieved the wilting degree,increased total respiration rate (Vt),capacity of alternative pathway (Valt),inhibited the malonaldehyde (MDA) content and increased the soluble sugar content,soluble protein content and proline content.However,pretreatment of rice plants with 4 mmol·L-1 H2O2 showed no obvious effect on endogenous H2O2 content and the generating rate of O-·2.These results suggest that the exogenous H2O2 could enhance rice seedlings chilling tolerance by enhancing respiration rate,the metabolism of carbohydrate and nitrogen and decreasing lipid peroxidation.The exogenous H2O2 was independent with the endogenous reactive oxygen species (ROS) pool in a certain way.
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Claims 10
Claim · model-written summary
H2O2 at 0–8 mmol·L-1 significantly increased relative water content under chilling.
- Taxon
- rice seedlings
Oryza sativat0 - Treatment
- 0～8 mmol·L-1 H2O2e0
- Outcome
- relative water content (RWC)e0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“0～8 mmol·L-1 H2O2 could significantly enhance relative water content (RWC)”
Claim · model-written summary
H2O2 at 0–8 mmol·L-1 significantly decreased relative membrane penetration under chilling.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 0～8 mmol·L-1 H2O2e0
- Outcome
- relative membrane penetratione0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“0～8 mmol·L-1 H2O2 could significantly enhance relative water content (RWC) and decrease relative membrane penetration”
Claim · model-written summary
The most obvious H2O2 effect occurred at 4 mmol·L-1.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 4 mmol·L-1e0
- Outcome
- obvious effect of H2O2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“The obvious effect of H2O2 occurred at 4 mmol·L-1”
Claim · model-written summary
At 4 mmol·L-1, H2O2 pretreatment relieved seedling wilting after chilling relative to water treatment.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 4 mmol·L-1 H2O2 pretreatmente0
- Outcome
- wilting degreee0
- Direction
- relievede0
- Comparator
- water-treated seedlings (contro1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“compared with water-treated seedlings (contro1),4 mmol·L-1 H2O2 pretreatment relieved the wilting degree”
Claim · model-written summary
At 4 mmol·L-1, H2O2 pretreatment increased total respiration rate and alternative pathway capacity after chilling.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 4 mmol·L-1 H2O2 pretreatmente0
- Outcome
- total respiration rate (Vt),capacity of alternative pathway (Valt)e0
- Direction
- increasede0
- Comparator
- water-treated seedlings (contro1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“compared with water-treated seedlings (contro1),4 mmol·L-1 H2O2 pretreatment relieved the wilting degree,increased total respiration rate (Vt),capacity of alternative pathway (Valt)”
Claim · model-written summary
At 4 mmol·L-1, H2O2 pretreatment reduced malonaldehyde content after chilling.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 4 mmol·L-1 H2O2 pretreatmente0
- Outcome
- malonaldehyde (MDA) contente0
- Direction
- inhibitede0
- Comparator
- water-treated seedlings (contro1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“compared with water-treated seedlings (contro1),4 mmol·L-1 H2O2 pretreatment relieved the wilting degree,increased total respiration rate (Vt),capacity of alternative pathway (Valt),inhibited the malonaldehyde (MDA) content”
Claim · model-written summary
At 4 mmol·L-1, H2O2 pretreatment increased soluble sugar, soluble protein and proline contents after chilling.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- 4 mmol·L-1 H2O2 pretreatmente0
- Outcome
- soluble sugar content,soluble protein content and proline contente0
- Direction
- increasede0
- Comparator
- water-treated seedlings (contro1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice seedlings”
e0“compared with water-treated seedlings (contro1),4 mmol·L-1 H2O2 pretreatment relieved the wilting degree,increased total respiration rate (Vt),capacity of alternative pathway (Valt),inhibited the malonaldehyde (MDA) content and increased the soluble sugar content,soluble protein content and proline content”
Claim · model-written summary
At 4 mmol·L-1, H2O2 pretreatment had no obvious effect on endogenous H2O2 content or O-·2 generation rate.
- Taxon
- rice plantsOryza sativae0
- Treatment
- 4 mmol·L-1 H2O2e0
- Outcome
- endogenous H2O2 content and the generating rate of O-·2e0
- Direction
- no obvious effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pretreatment of rice plants with 4 mmol·L-1 H2O2 showed no obvious effect on endogenous H2O2 content and the generating rate of O-·2”
Claim · model-written summary
The authors infer that exogenous H2O2 improves chilling tolerance through respiration and carbohydrate and nitrogen metabolism and less lipid peroxidation.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- exogenous H2O2e0
- Outcome
- chilling tolerancee0
- Direction
- enhancee0
- Qualifier
- enhancing respiration rate,the metabolism of carbohydrate and nitrogen and decreasing lipid peroxidatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous H2O2 could enhance rice seedlings chilling tolerance by enhancing respiration rate,the metabolism of carbohydrate and nitrogen and decreasing lipid peroxidation”
Claim · model-written summary
Exogenous H2O2 was interpreted as partly independent of the endogenous reactive oxygen species pool.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- exogenous H2O2e0
- Outcome
- independent with the endogenous reactive oxygen species (ROS) poole0
- Qualifier
- in a certain waye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The exogenous H2O2 was independent with the endogenous reactive oxygen species (ROS) pool in a certain way”
t0“rice seedlings”
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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.