Abstract
Abstract With the changing climatic scenario and increasing global mean temperature, heat stress became a major limiting factor for today's agriculture. To identify the underlying mechanism associated with heat tolerance in peanut, two experiments (field and growth chamber) were conducted with four genotypes (ICGS 44, GG 7, AK 159 and DRG 1) having differential high temperature stress sensitivity. Field grown plants under three different temperature (D 1 , D 2 and D 3 ) regimes simulated three temperature treatment effects with a variability of 3–4/4–5°C in mean day/night temperature, respectively. In growth chamber, imposition of heat shock (10°C above ambient inside growth chamber) revealed not only rapid induction (within 0.5 hr) of HSPs, especially small HSPs (HSP 17, HSP 40) in tolerant genotypes, but also its sustenance for longer duration (2 hr), which might help them to have better physiological adaptation strategies under high temperature stress. This was evident from significant advancement in phenophases observed with increase in temperature by 15–18 days at physiological maturity, while pollen viability and membrane stability reduced below 50% and 41%, respectively in DRG 1 with increase in mean day/night temperature. Maintenance of higher photosynthesis and transpiration rate and stomatal conductance helped the tolerant genotype ICGS 44 to keep relatively cooler canopy and higher photosynthates, ensuring better physiological condition in this genotype under heat stress. Significant increase (~2.5‐fold) in inositol and hexoses (glucose and fructose) content and reduction (>50%) in sucrose content in leaf tissues indicated degradation of storage carbohydrates for improved osmotic adjustment especially in tolerant genotypes under elevated temperature.
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Claims 10
Claim · model-written summary
Heat shock induced small HSPs (HSP 17, HSP 40) rapidly, within 0.5 hr, in tolerant peanut genotypes.
- Taxon
- peanut
Arachis hypogaeae0 - Treatment
- heat shock (10°C above ambient inside growth chamber)e2
- Outcome
- small HSPs (HSP 17, HSP 40)e1
- Direction
- increaseinferrede1
- Qualifier
- within 0.5 hre1
- Setting
- growth chambere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e1“rapid induction (within 0.5 hr) of HSPs, especially small HSPs (HSP 17, HSP 40) in tolerant genotypes”
e2“imposition of heat shock (10°C above ambient inside growth chamber)”
Claim · model-written summary
Heat shock sustained the induction of HSPs for 2 hr in tolerant peanut genotypes.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- heat shock (10°C above ambient inside growth chamber)e2
- Outcome
- HSPse1
- Direction
- increaseinferrede3
- Value
- 2 hre3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e1“rapid induction (within 0.5 hr) of HSPs, especially small HSPs (HSP 17, HSP 40) in tolerant genotypes”
e2“imposition of heat shock (10°C above ambient inside growth chamber)”
e3“but also its sustenance for longer duration (2 hr)”
Claim · model-written summary
A significant advancement of phenophases of 15–18 days occurred with increased temperature, at physiological maturity.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- increase in temperaturee4
- Outcome
- phenophasese4
- Direction
- advancemente4
- Value
- 15–18 dayse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e4“significant advancement in phenophases observed with increase in temperature by 15–18 days at physiological maturity”
Claim · model-written summary
Pollen viability in DRG 1 was reduced below 50% with increase in mean day/night temperature.
- Taxon
- peanutArachis hypogaeae0
- Material
- DRG 1e6
- Treatment
- increase in mean day/night temperaturee6
- Outcome
- pollen viabilitye6
- Direction
- reducede6
- Value
- below 50%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e6“pollen viability and membrane stability reduced below 50% and 41%, respectively in DRG 1 with increase in mean day/night temperature”
Claim · model-written summary
Membrane stability in DRG 1 was reduced by 41% with increase in mean day/night temperature.
- Taxon
- peanutArachis hypogaeae0
- Material
- DRG 1e6
- Treatment
- increase in mean day/night temperaturee6
- Outcome
- membrane stabilitye6
- Direction
- reducede6
- Value
- 41%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e6“pollen viability and membrane stability reduced below 50% and 41%, respectively in DRG 1 with increase in mean day/night temperature”
Claim · model-written summary
The tolerant genotype ICGS 44 maintained higher photosynthesis, transpiration rate and stomatal conductance under heat stress.
- Taxon
- peanutArachis hypogaeae0
- Material
- ICGS 44e7
- Treatment
- heat stresse7
- Outcome
- photosynthesis and transpiration rate and stomatal conductancee7
- Direction
- highere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e7“Maintenance of higher photosynthesis and transpiration rate and stomatal conductance helped the tolerant genotype ICGS 44 to keep relatively cooler canopy and higher photosynthates, ensuring better physiological condition in this genotype under heat stress”
Claim · model-written summary
Maintaining higher photosynthesis and transpiration helped ICGS 44 keep a relatively cooler canopy and higher photosynthates.
- Taxon
- peanutArachis hypogaeae0
- Material
- ICGS 44e7
- Outcome
- relatively cooler canopye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e7“Maintenance of higher photosynthesis and transpiration rate and stomatal conductance helped the tolerant genotype ICGS 44 to keep relatively cooler canopy and higher photosynthates, ensuring better physiological condition in this genotype under heat stress”
Claim · model-written summary
Inositol and hexoses (glucose and fructose) content increased about 2.5-fold under elevated temperature in tolerant genotypes.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- elevated temperaturee6
- Outcome
- inositol and hexoses (glucose and fructose) contente5
- Direction
- increasee5
- Value
- ~2.5‐folde5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e5“Significant increase (~2.5‐fold) in inositol and hexoses (glucose and fructose) content”
e6“especially in tolerant genotypes under elevated temperature”
Claim · model-written summary
Sucrose content in leaf tissues was reduced by more than 50% under elevated temperature.
- Taxon
- peanutArachis hypogaeae0
- Organ / stage
- leaf tissuese5
- Treatment
- elevated temperaturee6
- Outcome
- sucrose contente5
- Direction
- reductione5
- Value
- >50%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e6“especially in tolerant genotypes under elevated temperature”
e5“reduction (>50%) in sucrose content in leaf tissues”
Claim · model-written summary
Degradation of storage carbohydrates was indicated as a route to improved osmotic adjustment in peanut.
- Taxon
- peanutArachis hypogaeae0
- Outcome
- osmotic adjustmente5
- Qualifier
- degradation of storage carbohydratese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat tolerance in peanut”
e5“degradation of storage carbohydrates for improved osmotic adjustment”
The same questions in other papers
heat · physiology: photosynthesis · Arachis hypogaea (peanut)Positive and negative results
3 in the opposite direction
- negative
- negative
- negative
heat · molecular: metabolites · Arachis hypogaea (peanut)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- no effect
- negative
2 papers more in this group
See all 6 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.