Abstract
Stagnant flooding (SF) is an important constraint which prolonges partial submergence damages of rice plants and reduces grain yield. Due to the heterogeneity in flood-prone ecosystem, many different types of traditional rice varieties are being grown by the farmers. The local landraces adapted to extreme in water availability could be the sources of new gene(s) which would be utilized to improve the adaptability of rice to SF with high yield. The main goal of this study is to identify new genetic resources tolerant to SF based on morpho-physiological traits. A total of 16 rice varieties were selected after initial screening from more than 400 rice varieties which were collected from eastern states of India. The increase rate of plant height was higher under SF compared to control, whereas no such trend was observed in the increment rate of aboveground total dry weight and culm dry weight. Area of aerenchyma gas spaces per tiller increased whereas root oxidase activity decreased under SF. The reduction of root oxidase activity, leaf area, and leaf dry weight was higher in susceptible varieties under SF compared to control. Stability index for different grain yield and yield attributes revealed that the impact of SF differed among different varieties. Correlation coefficient studies among different parameters taking stability index showed significant association with the grain yield. Based on the findings, it was concluded that maintenance of equivalent panicle weight and panicle number, plant height and harvest index at the maturity stage, leaf area, leaf and culm dry weights, root oxidase activity and tiller numbers at the flowering stage under SF compared to control help the plant to counteract the adverse effects of SF.
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Claims 13
Claim · model-written summary
Rice plant height increase rate was higher under stagnant flooding than control.
- Taxon
- Rice
Oryza sativat0 - Treatment
- SFe0
- Outcome
- increase rate of plant heighte0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase rate of plant height was higher under SF compared to control”
t0“Rice”
Claim · model-written summary
Aboveground total dry weight increment did not show the same higher trend under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- SFe2
- Outcome
- increment rate of aboveground total dry weighte0
- Direction
- no such trende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no such trend was observed in the increment rate of aboveground total dry weight and culm dry weight”
t0“Stagnant Flooding Tolerance in Rice”
e2“The increase rate of plant height was higher under SF compared to control”
Claim · model-written summary
Culm dry weight increment did not show the same higher trend under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- SFe2
- Outcome
- culm dry weighte0
- Direction
- no such trende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no such trend was observed in the increment rate of aboveground total dry weight and culm dry weight”
t0“Stagnant Flooding Tolerance in Rice”
e2“The increase rate of plant height was higher under SF compared to control”
Claim · model-written summary
Aerenchyma gas space area per tiller increased under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- SFe0
- Outcome
- Area of aerenchyma gas spaces per tillere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Area of aerenchyma gas spaces per tiller increased whereas root oxidase activity decreased under SF.”
t0“Rice”
Claim · model-written summary
Root oxidase activity decreased under flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- SFe0
- Outcome
- root oxidase activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Area of aerenchyma gas spaces per tiller increased whereas root oxidase activity decreased under SF.”
t0“Rice”
Claim · model-written summary
Susceptible varieties showed greater root oxidase activity reduction under flooding.
- Taxon
- RiceOryza sativat0
- Material
- susceptible varietiese0
- Treatment
- SFe0
- Outcome
- root oxidase activitye0
- Direction
- reductione0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of root oxidase activity, leaf area, and leaf dry weight was higher in susceptible varieties under SF compared to control.”
t0“Rice”
Claim · model-written summary
Susceptible varieties showed greater leaf area reduction under flooding.
- Taxon
- RiceOryza sativat0
- Material
- susceptible varietiese0
- Treatment
- SFe0
- Outcome
- leaf areae0
- Direction
- reductione0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of root oxidase activity, leaf area, and leaf dry weight was higher in susceptible varieties under SF compared to control.”
t0“Rice”
Claim · model-written summary
Susceptible varieties showed greater leaf dry weight reduction under flooding.
- Taxon
- RiceOryza sativat0
- Material
- susceptible varietiese0
- Treatment
- SFe0
- Outcome
- leaf dry weighte0
- Direction
- reductione0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of root oxidase activity, leaf area, and leaf dry weight was higher in susceptible varieties under SF compared to control.”
t0“Rice”
Claim · model-written summary
Flooding effects on grain yield varied among varieties.
- Taxon
- RiceOryza sativat0
- Material
- different varietiese0
- Treatment
- SFe0
- Outcome
- grain yielde0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stability index for different grain yield and yield attributes revealed that the impact of SF differed among different varieties.”
t0“Rice”
Claim · model-written summary
Flooding effects on yield attributes varied among varieties.
- Taxon
- RiceOryza sativat0
- Material
- different varietiese0
- Treatment
- SFe0
- Outcome
- yield attributese0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stability index for different grain yield and yield attributes revealed that the impact of SF differed among different varieties.”
t0“Rice”
Claim · model-written summary
Trait stability indices were significantly associated with grain yield.
- Taxon
- RiceOryza sativat0
- Material
- Ricet0
- Outcome
- grain yielde0
- Qualifier
- significant associatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation coefficient studies among different parameters taking stability index showed significant association with the grain yield.”
t0“Rice”
Claim · model-written summary
The authors conclude that maintaining panicle weight and panicle number, plant height, and harvest index at maturity helps rice withstand flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- SFe0
- Outcome
- maintenance of equivalent panicle weight and panicle number, plant height and harvest index at the maturity stagee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintenance of equivalent panicle weight and panicle number, plant height and harvest index at the maturity stage, leaf area, leaf and culm dry weights, root oxidase activity and tiller numbers at the flowering stage under SF compared to control help the plant to counteract the adverse effects of SF.”
t0“Rice”
Claim · model-written summary
The authors conclude that maintaining leaf area, leaf and culm dry weights, root oxidase activity, and tiller number at flowering helps withstand flooding.
- Taxon
- RiceOryza sativat0
- Treatment
- SFe0
- Outcome
- leaf area, leaf and culm dry weights, root oxidase activity and tiller numbers at the flowering stagee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area, leaf and culm dry weights, root oxidase activity and tiller numbers at the flowering stage under SF compared to control help the plant to counteract the adverse effects of SF.”
t0“Rice”
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See all 138 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.