Abstract
Rice yield is significantly affected by low temperature and drought stress. This study investigated the effects of low canopy and root temperature and/or drought stress on yield, quality, biomass, photosynthesis, and antioxidant responses in different rice genotypes viz., Huahang 31 and Yuejingsimiao 2 at the booting stage. The experiment included eight treatments, that is, the natural growth condition (T0) as a control, canopy low-temperature (CL), root low-temperature (RL), root drought (RD), and a combination of stresses. The results revealed that the RL and combined stress (CL&RL, RL&RD, and CL&RL&RD) treatments significantly decreased the yield and quality, with the CL&RL&RD treatment significantly reducing the yields of Huahang 31 and Yuejingsimiao 2 by 75.49% and 65.25%, respectively. The RL and combined stress (CL&RL, RL&RD, and CL&RL&RD) treatments significantly affected the photosynthesis parameters and increased the stem sheath dry weight while decreasing the panicle dry weight, thereby affecting rice biomass accumulation. Additionally, the combined stress treatments significantly reduced the proline content and catalase activity, thereby affecting the antioxidant response of rice. Root low-temperature stress affects rice more than canopy low-temperature stress does, and drought stress exacerbates the negative effects of other stresses on rice. Overall, root low-temperature and combined stress treatments affect the antioxidant response, thereby influencing leaf stomatal conductance, photosynthetic traits, and ultimately affecting the yield, quality, and biomass of rice. Among the two varieties, Yuejingsimiao 2 showed stronger stress resistance than Huahang 31 did. Our study provides a reference for subsequent studies on the physiology of rice under adverse stress conditions.
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Claims 11
Claim · model-written summary
Root low-temperature and combined stress treatments significantly decreased rice yield and quality relative to the natural growth control.
- Taxon
- rice
Oryza sativat0 - Material
- Huahang 31 and Yuejingsimiao 2e0
- Organ / stage
- booting stagee0
- Treatment
- RL and combined stresse1
- Outcome
- yield and qualitye1
- Direction
- significantly decreasede1
- Comparator
- natural growth condition (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e0“in different rice genotypes viz., Huahang 31 and Yuejingsimiao 2 at the booting stage”
e1“The results revealed that the RL and combined stress (CL&RL, RL&RD, and CL&RL&RD) treatments significantly decreased the yield and quality”
e2“the natural growth condition (T0) as a control”
Claim · model-written summary
The CL&RL&RD treatment reduced the yield of Huahang 31 by 75.49% relative to the natural growth control.
- Taxon
- riceOryza sativat0
- Material
- Huahang 31e3
- Treatment
- CL&RL&RD treatmente3
- Outcome
- yieldse3
- Direction
- significantly reducinge3
- Value
- 75.49%e3
- Comparator
- natural growth condition (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e2“the natural growth condition (T0) as a control”
e3“with the CL&RL&RD treatment significantly reducing the yields of Huahang 31 and Yuejingsimiao 2 by 75.49% and 65.25%, respectively”
Claim · model-written summary
The CL&RL&RD treatment reduced the yield of Yuejingsimiao 2 by 65.25% relative to the natural growth control.
- Taxon
- riceOryza sativat0
- Material
- Yuejingsimiao 2e3
- Treatment
- CL&RL&RD treatmente3
- Outcome
- yieldse3
- Direction
- significantly reducinge3
- Value
- 65.25%e3
- Comparator
- natural growth condition (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e2“the natural growth condition (T0) as a control”
e3“with the CL&RL&RD treatment significantly reducing the yields of Huahang 31 and Yuejingsimiao 2 by 75.49% and 65.25%, respectively”
Claim · model-written summary
RL and combined stress treatments significantly affected rice photosynthesis parameters relative to the natural growth control.
- Taxon
- riceOryza sativat0
- Treatment
- RL and combined stresse4
- Outcome
- photosynthesis parameterse4
- Comparator
- natural growth condition (T0)e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e2“the natural growth condition (T0) as a control”
e4“The RL and combined stress (CL&RL, RL&RD, and CL&RL&RD) treatments significantly affected the photosynthesis parameters and increased the stem sheath dry weight while decreasing the panicle dry weight”
Claim · model-written summary
RL and combined stress treatments increased rice stem sheath dry weight relative to the natural growth control.
- Taxon
- riceOryza sativat0
- Organ / stage
- stem sheathe4
- Treatment
- RL and combined stresse4
- Outcome
- stem sheath dry weighte4
- Direction
- increasede4
- Comparator
- natural growth condition (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e2“the natural growth condition (T0) as a control”
e4“The RL and combined stress (CL&RL, RL&RD, and CL&RL&RD) treatments significantly affected the photosynthesis parameters and increased the stem sheath dry weight while decreasing the panicle dry weight”
Claim · model-written summary
RL and combined stress treatments decreased rice panicle dry weight relative to the natural growth control.
- Taxon
- riceOryza sativat0
- Organ / stage
- paniclee4
- Treatment
- RL and combined stresse4
- Outcome
- panicle dry weighte4
- Direction
- decreasinge4
- Comparator
- natural growth condition (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e2“the natural growth condition (T0) as a control”
e4“The RL and combined stress (CL&RL, RL&RD, and CL&RL&RD) treatments significantly affected the photosynthesis parameters and increased the stem sheath dry weight while decreasing the panicle dry weight”
Claim · model-written summary
Combined stress treatments significantly reduced rice proline content and catalase activity relative to the natural growth control.
- Taxon
- riceOryza sativat0
- Treatment
- combined stress treatmentse5
- Outcome
- proline content and catalase activitye5
- Direction
- significantly reducede5
- Comparator
- natural growth condition (T0)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e2“the natural growth condition (T0) as a control”
e5“Additionally, the combined stress treatments significantly reduced the proline content and catalase activity”
Claim · model-written summary
Root low-temperature stress affects rice more than canopy low-temperature stress does.
- Taxon
- riceOryza sativat0
- Treatment
- root low-temperature stresse6
- Outcome
- affects rice more than canopy low-temperature stress doese6
- Direction
- affects rice moree6
- Comparator
- canopy low-temperature stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e6“Root low-temperature stress affects rice more than canopy low-temperature stress does”
Claim · model-written summary
Drought stress exacerbates the negative effects of other stresses on rice.
- Taxon
- riceOryza sativat0
- Treatment
- drought stresse7
- Outcome
- negative effects of other stressese7
- Direction
- exacerbatese7
- Comparator
- other stressese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e7“drought stress exacerbates the negative effects of other stresses on rice”
Claim · model-written summary
Root low-temperature and combined stress treatments affect the antioxidant response, which in turn influences stomatal conductance, photosynthetic traits, yield, quality and biomass of rice.
- Taxon
- riceOryza sativat0
- Treatment
- root low-temperature and combined stress treatmentse0
- Outcome
- yield, quality, and biomasse0
- Qualifier
- antioxidant responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e0“Overall, root low-temperature and combined stress treatments affect the antioxidant response, thereby influencing leaf stomatal conductance, photosynthetic traits, and ultimately affecting the yield, quality, and biomass of rice”
Claim · model-written summary
Yuejingsimiao 2 showed stronger stress resistance than Huahang 31.
- Taxon
- riceOryza sativat0
- Material
- Yuejingsimiao 2e0
- Outcome
- stress resistancee0
- Direction
- strongere0
- Comparator
- Huahang 31e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Responses in Rice”
e0“Among the two varieties, Yuejingsimiao 2 showed stronger stress resistance than Huahang 31 did”
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