Abstract
The aim of the present research was to compare the effects of different abiotic stresses (drought, salinity and submergence) on growth, photosynthesis and PSII activity along with antioxidant defence of three premium rice landraces, namely Kalajeera, Machhakanta and Haladichudi from Jeypore tract of Odisha, India to evaluate their performance under multiple stresses and possibility of using in the pre-breeding programs. Results showed that drought, salinity and submergence significantly reduced plant growth, leaf photosynthesis, water use efficiency (WUE), carboxylation efficiency (CE), PSII activity and SPAD chlorophyll index, and the highest effect was observed in susceptible check variety (IR64). In addition, the indigenous rice lines showed better stomatal traits such as stomatal density (SD), stomatal size (SS) and stomatal number per leaf area (S/LA). Notably, higher activities of antioxidative enzymes and proline accumulation was observed in studied indigenous rice landraces and were found comparable with the drought and salinity tolerant (N22) and submergence tolerant (FR13A) check varieties. Based on our findings it was revealed that these landraces can be expected to possess an adequate level of tolerance to drought, salinity and submergence and showed adaptive fitness to multiple stresses during seedling stage. These landraces can be considered as potential donor for future rice pre-breeding program.
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Claims 8
Claim · model-written summary
Drought, salinity and submergence significantly reduced plant growth.
- Taxon
- rice
Oryza sativat0 - Treatment
- drought, salinity and submergencee0
- Outcome
- plant growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought, salinity and submergence significantly reduced plant growth, leaf photosynthesis, water use efficiency (WUE), carboxylation efficiency (CE), PSII activity and SPAD chlorophyll index”
t0“rice”
Claim · model-written summary
The three stresses significantly reduced leaf photosynthesis, water use and carboxylation efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- drought, salinity and submergencee0
- Outcome
- leaf photosynthesis, water use efficiency (WUE), carboxylation efficiency (CE)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought, salinity and submergence significantly reduced plant growth, leaf photosynthesis, water use efficiency (WUE), carboxylation efficiency (CE), PSII activity and SPAD chlorophyll index”
t0“rice”
Claim · model-written summary
The three stresses significantly reduced PSII activity and SPAD chlorophyll index.
- Taxon
- riceOryza sativat0
- Treatment
- drought, salinity and submergencee0
- Outcome
- PSII activity and SPAD chlorophyll indexe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought, salinity and submergence significantly reduced plant growth, leaf photosynthesis, water use efficiency (WUE), carboxylation efficiency (CE), PSII activity and SPAD chlorophyll index”
t0“rice”
Claim · model-written summary
The susceptible check IR64 showed the greatest stress effect.
- Taxon
- riceOryza sativat0
- Material
- IR64e0
- Outcome
- highest effecte0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest effect was observed in susceptible check variety (IR64)”
t0“rice”
Claim · model-written summary
Indigenous rice lines had better stomatal density, size and number per leaf area.
- Taxon
- riceOryza sativae0
- Material
- indigenous rice linese0
- Outcome
- stomatal density (SD), stomatal size (SS) and stomatal number per leaf area (S/LA)e0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indigenous rice lines showed better stomatal traits such as stomatal density (SD), stomatal size (SS) and stomatal number per leaf area (S/LA)”
Claim · model-written summary
Studied landraces had higher antioxidative enzyme activity and proline accumulation.
- Taxon
- riceOryza sativae0
- Material
- indigenous rice landracese0
- Outcome
- activities of antioxidative enzymes and proline accumulatione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher activities of antioxidative enzymes and proline accumulation was observed in studied indigenous rice landraces”
Claim · model-written summary
Landrace antioxidant responses were comparable with tolerant check varieties.
- Taxon
- riceOryza sativat0
- Outcome
- comparablee0
- Direction
- comparablee0
- Comparator
- N22e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were found comparable with the drought and salinity tolerant (N22) and submergence tolerant (FR13A) check varieties”
t0“rice”
Claim · model-written summary
Authors considered the landraces potential donors for rice pre-breeding.
- Taxon
- riceOryza sativae0
- Material
- These landracese0
- Outcome
- potential donor for future rice pre-breeding programe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These landraces can be considered as potential donor for future rice pre-breeding program”
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See all 282 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.