Abstract
Ascorbic acid (AsA) plays a crucial role in the physiological processes of rice plants when they encounter various biotic and abiotic stresses. However, the specific mechanism by which AsA affects cold tolerance in rice seedlings remains unclear. Two rice genotypes, Zhongzao39 (ZZ39) and its recombinant inbred line RIL82, were exposed to cold stress, resulting in more damage observed in RIL82 compared to ZZ39. This damage included higher levels of relative electrolytic leakage (REC), malondialdehyde (MDA), H2O2, a lower Fv/Fm, and a lower survival rate. A comprehensive analysis of transcriptome and metabolome data indicated that AsA was involved in regulating cold tolerance in ZZ39 and RIL82 seedling plants. AsA content increased in ZZ39 while it decreased in RIL82 under cold stress. Additionally, analysis of carbohydrate contents highlighted their important role in the responses to cold stress of these two genotypes. Importantly, exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O. These findings highlight the potential significance of AsA in mitigating the effects of cold stress on rice seedling plants.
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Claims 12
Claim · model-written summary
Cold stress caused more damage in RIL82 rice seedlings than in ZZ39.
- Taxon
- rice
Oryza sativae0 - Material
- RIL82e0
- Treatment
- cold stresse0
- Outcome
- damagee0
- Direction
- more damagee0
- Comparator
- ZZ39e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two rice genotypes, Zhongzao39 (ZZ39) and its recombinant inbred line RIL82, were exposed to cold stress, resulting in more damage observed in RIL82 compared to ZZ39”
Claim · model-written summary
Under cold stress, RIL82 had higher REC, MDA and H2O2 than ZZ39.
- Taxon
- riceOryza sativat0
- Material
- RIL82t1
- Outcome
- relative electrolytic leakage (REC), malondialdehyde (MDA), H2O2e0
- Direction
- higher levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This damage included higher levels of relative electrolytic leakage (REC), malondialdehyde (MDA), H2O2”
t0“Rice”
t1“line RIL82”
Claim · model-written summary
Under cold stress, RIL82 had lower Fv/Fm and survival rate than ZZ39.
- Taxon
- riceOryza sativat0
- Material
- RIL82t1
- Outcome
- Fv/Fm, and a lower survival ratee0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a lower Fv/Fm, and a lower survival rate”
t0“Rice”
t1“line RIL82”
Claim · model-written summary
AsA content increased in ZZ39 under cold stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AsA content increased in ZZ39 while it decreased in RIL82 under cold stress”
t0“Rice”
Claim · model-written summary
AsA content decreased in RIL82 under cold stress.
- Taxon
- riceOryza sativat0
- Material
- RIL82e0
- Treatment
- cold stresse0
- Outcome
- AsA contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AsA content increased in ZZ39 while it decreased in RIL82 under cold stress”
t0“Rice”
Claim · model-written summary
Carbohydrate contents were implicated in the cold response of both rice genotypes.
- Taxon
- riceOryza sativat0
- Outcome
- carbohydrate contentse0
- Qualifier
- responses to cold stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“analysis of carbohydrate contents highlighted their important role in the responses to cold stress of these two genotypes”
t0“Rice”
Claim · model-written summary
Exogenous AsA enhanced Fv/Fm and YII in both rice genotypes relative to water treatment.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous AsAe0
- Outcome
- maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII)e0
- Direction
- enhancede0
- Comparator
- plants treated with H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O”
t0“Rice”
Claim · model-written summary
Exogenous sucrose enhanced Fv/Fm and YII in both rice genotypes relative to water treatment.
- Taxon
- riceOryza sativat0
- Treatment
- sucrosee0
- Outcome
- maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII)e0
- Direction
- enhancede0
- Comparator
- plants treated with H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O”
t0“Rice”
Claim · model-written summary
Combined exogenous AsA and sucrose enhanced Fv/Fm and YII relative to water treatment.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous AsA and sucrosee0
- Outcome
- maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII)e0
- Direction
- enhancede0
- Comparator
- plants treated with H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O”
t0“Rice”
Claim · model-written summary
Exogenous AsA decreased H2O2 and MDA levels and improved cold tolerance compared with water treatment.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous AsAe0
- Outcome
- H2O2 and MDA levelse0
- Direction
- decreasede0
- Comparator
- plants treated with H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O”
t0“Rice”
Claim · model-written summary
Exogenous sucrose decreased H2O2 and MDA levels and improved cold tolerance compared with water treatment.
- Taxon
- riceOryza sativat0
- Treatment
- sucrosee0
- Outcome
- H2O2 and MDA levelse0
- Direction
- decreasede0
- Comparator
- plants treated with H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O”
t0“Rice”
Claim · model-written summary
Combined exogenous AsA and sucrose decreased H2O2 and MDA levels compared with water treatment.
- Taxon
- riceOryza sativat0
- Treatment
- exogenous AsA and sucrosee0
- Outcome
- H2O2 and MDA levelse0
- Direction
- decreasede0
- Comparator
- plants treated with H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous AsA and sucrose, either alone or in combination, enhanced the values of maximum fluorescence quantum yield (Fv/Fm) and effective quantum yield (YII) as well as decreased H2O2 and MDA levels to improve cold tolerance in both genotypes compared with plants treated with H2O”
t0“Rice”
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