Abstract
Drought stress (DS) and heat stress (HS) have adverse effects on wheat (Triticum aestivum L.) growth, serving as the primary constraints that significantly limit grain yield. Present study was carried out during 2020–21 and 2021–22 at the research farm of ICAR-Indian Agricultural Research Institute, New Delhi to evaluate the effects of drought and heat stress on grain quality parameters of 4 contrasting wheat genotypes. Several physiological and biochemical parameters were analyzed in wheat cv. C306 (thermotolerant), HD3271 (thermosusceptible), H11500 (drought tolerant) and HD3226 (drought susceptible) under DS and HS. Our study found that disintegration of chlorophyll pigments was higher in wheat cv. HD3226 (43%) under combined stress. Grain weight per spike was reduced by 30% in C306 and 47.3% in HD 3271 under combined drought and heat stress treatment. All cultivars showed reduction in starch, amylose, amylopectin, AGPase and Soluble starch synthase activity under DS and HS. Additionally, a significant increase in total soluble protein and free amino acid content were observed in all genotypes under combined stress. Chlorophyll content and grain weight per spike were positively correlated with the starch, amylose, amylopectin, soluble starch synthase and AGPase activity, while negatively related to the total soluble protein and free amino acid content. The tolerant genotypes maintained higher chlorophyll content, grain weight per spike, starch, amylose, amylopectin, soluble starch synthase and AGPase activity could be used for breeding, for the adaptation to drought and heat under climate change.
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Claims 13
Claim · model-written summary
HD3226 showed higher chlorophyll pigment disintegration of 43% under combined stress.
- Taxon
- wheat
Triticum aestivume0 - Material
- HD3226e0
- Treatment
- combined stresse0
- Outcome
- disintegration of chlorophyll pigmentse0
- Direction
- highere0
- Value
- 43%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our study found that disintegration of chlorophyll pigments was higher in wheat cv. HD3226 (43%) under combined stress.”
Claim · model-written summary
Combined drought and heat reduced C306 grain weight per spike by 30%.
- Taxon
- wheatTriticum aestivumt0
- Material
- C306e0
- Treatment
- combined drought and heat stress treatmente0
- Outcome
- Grain weight per spikee0
- Direction
- reducede0
- Value
- 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain weight per spike was reduced by 30% in C306 and 47.3% in HD 3271 under combined drought and heat stress treatment.”
t0“wheat”
Claim · model-written summary
Combined drought and heat reduced HD 3271 grain weight per spike by 47.3%.
- Taxon
- wheatTriticum aestivumt0
- Material
- HD 3271e0
- Treatment
- combined drought and heat stress treatmente0
- Outcome
- Grain weight per spikee0
- Direction
- reducede0
- Value
- 47.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain weight per spike was reduced by 30% in C306 and 47.3% in HD 3271 under combined drought and heat stress treatment.”
t0“wheat”
Claim · model-written summary
All wheat cultivars showed reduced starch, amylose and amylopectin under drought and heat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- DS and HSe0
- Outcome
- starch, amylose, amylopectine0
- Direction
- reductione0
- Qualifier
- All cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All cultivars showed reduction in starch, amylose, amylopectin, AGPase and Soluble starch synthase activity under DS and HS.”
t0“wheat”
Claim · model-written summary
All wheat cultivars showed reduced AGPase and soluble starch synthase activity under drought and heat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- DS and HSe0
- Outcome
- AGPase and Soluble starch synthase activitye0
- Direction
- reductione0
- Qualifier
- All cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All cultivars showed reduction in starch, amylose, amylopectin, AGPase and Soluble starch synthase activity under DS and HS.”
t0“wheat”
Claim · model-written summary
Combined stress significantly increased total soluble protein and free amino acid content in all wheat genotypes.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- combined stresse0
- Outcome
- total soluble protein and free amino acid contente0
- Direction
- increasee0
- Qualifier
- all genotypese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additionally, a significant increase in total soluble protein and free amino acid content were observed in all genotypes under combined stress.”
t0“wheat”
Claim · model-written summary
Chlorophyll content and grain weight per spike were positively correlated with starch, amylose and amylopectin.
- Taxon
- wheatTriticum aestivumt0
- Compound
- starch, amylose, amylopectine0
- Outcome
- Chlorophyll content and grain weight per spikee0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content and grain weight per spike were positively correlated with the starch, amylose, amylopectin, soluble starch synthase and AGPase activity”
t0“wheat”
Claim · model-written summary
Chlorophyll content and grain weight per spike were positively correlated with soluble starch synthase and AGPase activity.
- Taxon
- wheatTriticum aestivumt0
- Gene
- soluble starch synthase and AGPasee0
- Outcome
- Chlorophyll content and grain weight per spikee0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content and grain weight per spike were positively correlated with the starch, amylose, amylopectin, soluble starch synthase and AGPase activity”
t0“wheat”
Claim · model-written summary
Chlorophyll content and grain weight per spike were negatively related to total soluble protein and free amino acid content.
- Taxon
- wheatTriticum aestivumt0
- Gene
- total soluble proteine0
- Compound
- free amino acide0
- Outcome
- Chlorophyll content and grain weight per spikee0
- Direction
- negatively relatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content and grain weight per spike were positively correlated with the starch, amylose, amylopectin, soluble starch synthase and AGPase activity, while negatively related to the total soluble protein and free amino acid content.”
t0“wheat”
Claim · model-written summary
Tolerant wheat genotypes maintained higher chlorophyll content and grain weight per spike.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- chlorophyll content, grain weight per spikee0
- Direction
- highere0
- Qualifier
- tolerant genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tolerant genotypes maintained higher chlorophyll content, grain weight per spike, starch, amylose, amylopectin, soluble starch synthase and AGPase activity could be used for breeding, for the adaptation to drought and heat under climate change.”
t0“wheat”
Claim · model-written summary
Tolerant wheat genotypes maintained higher starch, amylose and amylopectin.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- starch, amylose, amylopectine0
- Direction
- highere0
- Qualifier
- tolerant genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tolerant genotypes maintained higher chlorophyll content, grain weight per spike, starch, amylose, amylopectin, soluble starch synthase and AGPase activity could be used for breeding, for the adaptation to drought and heat under climate change.”
t0“wheat”
Claim · model-written summary
Tolerant wheat genotypes maintained higher soluble starch synthase and AGPase activity.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- soluble starch synthase and AGPase activitye0
- Direction
- highere0
- Qualifier
- tolerant genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tolerant genotypes maintained higher chlorophyll content, grain weight per spike, starch, amylose, amylopectin, soluble starch synthase and AGPase activity could be used for breeding, for the adaptation to drought and heat under climate change.”
t0“wheat”
Claim · model-written summary
Tolerant wheat genotypes could be used in breeding for drought and heat adaptation under climate change.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- used for breedinge0
- Qualifier
- for the adaptation to drought and heat under climate changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tolerant genotypes maintained higher chlorophyll content, grain weight per spike, starch, amylose, amylopectin, soluble starch synthase and AGPase activity could be used for breeding, for the adaptation to drought and heat under climate change.”
t0“wheat”
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