Abstract
Hydrogen peroxide (H2O2) and salicylic acid (SA) exhibit protective effects against a wide array of stresses. In this study, we investigated the relative efficacy of exogenous H2O2 and SA in conferring drought tolerance in rice (Oryza sativa L.). The experiment was repeated two times, firstly in a hydroponic system and secondly in soil. The results revealed that drought hampered germination indices, seedling growth, photosynthetic pigments, and water content, whereas increased proline content. It also triggered higher H2O2 production and consequently elevated lipid peroxidation, which is a particular indication of oxidative damage. However, exogenous H2O2 or SA treatment effectively alleviated oxidative damage in rice seedlings both in hydroponic and soil systems via upregulating antioxidant enzymes. Nevertheless, regulation of proline level and augmentation of plant-water status were crucial to confer drought tolerance. Exogenous H2O2 or SA also protected photosynthetic pigments from oxidative damage that might help to maintain normal photosynthesis under drought. Besides, 5 mmol/L H2O2 and 0.5 or 1 mmol/L SA showed similar effectiveness on mitigating drought stress. Finally, our findings suggest that exogenous H2O2 or SA could evenly be effectual in the amending growth of rice seedlings under drought conditions.
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Claims 9
Claim · model-written summary
Drought reduced rice germination indices, seedling growth, photosynthetic pigments and water content.
- Taxon
- rice
Oryza sativat0 - Treatment
- droughte0
- Outcome
- germination indices, seedling growth, photosynthetic pigments, and water contente0
- Direction
- hamperede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought hampered germination indices, seedling growth, photosynthetic pigments, and water content”
t0“rice”
Claim · model-written summary
Drought increased proline content in rice.
- Taxon
- riceOryza sativat0
- Treatment
- droughte1
- Outcome
- proline contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas increased proline content”
t0“rice”
e1“drought hampered germination indices, seedling growth, photosynthetic pigments, and water content”
Claim · model-written summary
Drought increased H2O2 production and lipid peroxidation in rice.
- Taxon
- riceOryza sativat0
- Treatment
- droughte1
- Outcome
- H2O2 production and consequently elevated lipid peroxidatione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It also triggered higher H2O2 production and consequently elevated lipid peroxidation”
t0“rice”
e1“drought hampered germination indices, seedling growth, photosynthetic pigments, and water content”
Claim · model-written summary
Exogenous H2O2 alleviated oxidative damage in rice seedlings through increased antioxidant enzyme activity in both systems.
- Taxon
- riceOryza sativae0
- Treatment
- exogenous H2O2e0
- Outcome
- oxidative damagee0
- Direction
- alleviatede0
- Qualifier
- upregulating antioxidant enzymese0
- Setting
- hydroponic and soil systemse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous H2O2 or SA treatment effectively alleviated oxidative damage in rice seedlings both in hydroponic and soil systems via upregulating antioxidant enzymes”
Claim · model-written summary
Exogenous SA alleviated oxidative damage in rice seedlings through increased antioxidant enzyme activity in both systems.
- Taxon
- riceOryza sativae0
- Treatment
- SA treatmente0
- Outcome
- oxidative damagee0
- Direction
- alleviatede0
- Qualifier
- upregulating antioxidant enzymese0
- Setting
- hydroponic and soil systemse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous H2O2 or SA treatment effectively alleviated oxidative damage in rice seedlings both in hydroponic and soil systems via upregulating antioxidant enzymes”
Claim · model-written summary
Proline regulation and improved plant water status were crucial for rice drought tolerance.
- Taxon
- riceOryza sativat0
- Outcome
- drought tolerancee0
- Qualifier
- regulation of proline level and augmentation of plant-water statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“regulation of proline level and augmentation of plant-water status were crucial to confer drought tolerance”
t0“rice”
Claim · model-written summary
Exogenous H2O2 protected photosynthetic pigments under drought.
- Taxon
- riceOryza sativat0
- Treatment
- Exogenous H2O2e0
- Outcome
- photosynthetic pigmentse0
- Direction
- protectede0
- Qualifier
- under droughte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous H2O2 or SA also protected photosynthetic pigments from oxidative damage that might help to maintain normal photosynthesis under drought”
t0“rice”
Claim · model-written summary
Exogenous SA protected photosynthetic pigments under drought.
- Taxon
- riceOryza sativat0
- Treatment
- SAe0
- Outcome
- photosynthetic pigmentse0
- Direction
- protectede0
- Qualifier
- under droughte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous H2O2 or SA also protected photosynthetic pigments from oxidative damage that might help to maintain normal photosynthesis under drought”
t0“rice”
Claim · model-written summary
5 mmol/L H2O2 and 0.5 or 1 mmol/L SA had similar effectiveness for mitigating rice drought stress.
- Taxon
- riceOryza sativat0
- Treatment
- 5 mmol/L H2O2 and 0.5 or 1 mmol/L SAe0
- Outcome
- similar effectiveness on mitigating drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 mmol/L H2O2 and 0.5 or 1 mmol/L SA showed similar effectiveness on mitigating drought stress”
t0“rice”
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See all 96 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.