Abstract
Abstract Drought is a severe abiotic stress and the major constraint on wheat ( Triticum aestivum L.) productivity world wide. Deciphering the mechanisms of drought tolerance is a challenging task because of the complexity of drought responses, environmental factors and their interactions. The objective of this study was to evaluate the ability of the antioxidative defence system in imparting tolerance against drought‐induced oxidative stress and yield loss in two wheat genotypes, when subjected to long‐term field drought. Drought resulted in an increase in H 2 O 2 accumulation and lipid peroxidation and decrease in ascorbate level in roots and leaves at different plant developmental stages. Drought‐tolerant genotype having higher antioxidative enzymes activities, and ascorbate level was superior to that of sensitive genotype in maintaining lower H 2 O 2 content and lipid peroxidation and higher growth, yield and yield components under water deficit. Various antioxidative enzymes showed positive correlation with ascorbate and negative with H 2 O 2 content. In developing grains, antioxidative defence response was nearly similar among both the genotypes under control condition; however, sensitive genotype failed to modulate the activities of antioxidative enzymes according to the ROS rush under field drought. Poor capacity of the antioxidative defence system in vegetative and reproductive tissues of sensitive genotype seems to be responsible, at least partly, for reduced yield potential under water deficit.
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Claims 14
Claim · model-written summary
Drought increased hydrogen peroxide accumulation in wheat roots and leaves.
Not reportedTaxonComparator
Verbatim
e0“Drought resulted in an increase in H 2 O 2 accumulation and lipid peroxidation and decrease in ascorbate level in roots and leaves at different plant developmental stages.”
t0“Wheat (Triticum aestivum L.)”
Claim · model-written summary
Drought increased lipid peroxidation in wheat roots and leaves.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- roots and leavese0
- Treatment
- Droughte0
- Outcome
- lipid peroxidatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought resulted in an increase in H 2 O 2 accumulation and lipid peroxidation and decrease in ascorbate level in roots and leaves at different plant developmental stages.”
t0“Wheat”
Claim · model-written summary
Drought decreased ascorbate levels in wheat roots and leaves.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- roots and leavese0
- Treatment
- Droughte0
- Outcome
- ascorbate levele0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought resulted in an increase in H 2 O 2 accumulation and lipid peroxidation and decrease in ascorbate level in roots and leaves at different plant developmental stages.”
t0“Wheat”
Claim · model-written summary
The tolerant genotype maintained lower hydrogen peroxide content than the sensitive genotype under water deficit.
- Taxon
- WheatTriticum aestivumt0
- Material
- Drought‐tolerant genotypee0
- Outcome
- H 2 O 2 contente0
- Direction
- lowere0
- Qualifier
- under water deficite0
- Comparator
- sensitive genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought‐tolerant genotype having higher antioxidative enzymes activities, and ascorbate level was superior to that of sensitive genotype in maintaining lower H 2 O 2 content and lipid peroxidation and higher growth, yield and yield components under water deficit.”
t0“Wheat”
Claim · model-written summary
The tolerant genotype maintained lower lipid peroxidation than the sensitive genotype under water deficit.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- lipid peroxidatione0
- Direction
- lowere0
- Qualifier
- under water deficite0
- Comparator
- sensitive genotypee0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sensitive genotype in maintaining lower H 2 O 2 content and lipid peroxidation and higher growth, yield and yield components under water deficit.”
t0“Wheat”
Claim · model-written summary
The tolerant genotype had higher antioxidative enzyme activities than the sensitive genotype.
- Taxon
- WheatTriticum aestivumt0
- Material
- Drought‐tolerant genotypee0
- Outcome
- antioxidative enzymes activitiese0
- Direction
- highere0
- Comparator
- sensitive genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought‐tolerant genotype having higher antioxidative enzymes activities, and ascorbate level was superior to that of sensitive genotype”
t0“Wheat”
Claim · model-written summary
The tolerant genotype had higher ascorbate than the sensitive genotype.
- Taxon
- WheatTriticum aestivumt0
- Material
- Drought‐tolerant genotypee0
- Outcome
- ascorbate levele0
- Direction
- highere0
- Comparator
- sensitive genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought‐tolerant genotype having higher antioxidative enzymes activities, and ascorbate level was superior to that of sensitive genotype”
t0“Wheat”
Claim · model-written summary
The tolerant genotype maintained higher growth than the sensitive genotype under drought.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- growthe0
- Direction
- highere0
- Qualifier
- under water deficite0
- Comparator
- sensitive genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sensitive genotype in maintaining lower H 2 O 2 content and lipid peroxidation and higher growth, yield and yield components under water deficit.”
t0“Wheat”
Claim · model-written summary
The tolerant genotype maintained higher yield and yield components under drought.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- yield and yield componentse0
- Direction
- highere0
- Qualifier
- under water deficite0
- Comparator
- sensitive genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sensitive genotype in maintaining lower H 2 O 2 content and lipid peroxidation and higher growth, yield and yield components under water deficit.”
t0“Wheat”
Claim · model-written summary
Antioxidative enzymes correlated positively with ascorbate.
- Taxon
- WheatTriticum aestivumt0
- Gene
- antioxidative enzymese0
- Outcome
- ascorbatee0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Various antioxidative enzymes showed positive correlation with ascorbate and negative with H 2 O 2 content.”
t0“Wheat”
Claim · model-written summary
Antioxidative enzymes correlated negatively with hydrogen peroxide content.
- Taxon
- WheatTriticum aestivumt0
- Gene
- antioxidative enzymese0
- Outcome
- H 2 O 2 contente0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Various antioxidative enzymes showed positive correlation with ascorbate and negative with H 2 O 2 content.”
t0“Wheat”
Claim · model-written summary
Antioxidative defence in developing grains was nearly similar across genotypes under control conditions.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- developing grainse0
- Outcome
- antioxidative defence responsee0
- Direction
- nearly similare0
- Qualifier
- under control conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In developing grains, antioxidative defence response was nearly similar among both the genotypes under control condition”
t0“Wheat”
Claim · model-written summary
The sensitive genotype failed to adjust antioxidative enzyme activities under field drought.
- Taxon
- WheatTriticum aestivumt0
- Material
- sensitive genotypee0
- Outcome
- activities of antioxidative enzymese0
- Direction
- failed to modulatee0
- Qualifier
- under field droughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sensitive genotype failed to modulate the activities of antioxidative enzymes according to the ROS rush under field drought.”
t0“Wheat”
Claim · model-written summary
The authors infer that weak antioxidative defence partly contributes to reduced yield in the sensitive genotype under water deficit.
- Taxon
- WheatTriticum aestivumt0
- Material
- sensitive genotypee0
- Organ / stage
- vegetative and reproductive tissuese0
- Outcome
- yield potentiale0
- Direction
- reducede0
- Qualifier
- Poor capacity of the antioxidative defence systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Poor capacity of the antioxidative defence system in vegetative and reproductive tissues of sensitive genotype seems to be responsible, at least partly, for reduced yield potential under water deficit.”
t0“Wheat”
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See all 128 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.