Abstract
The role of plant antioxidant systems in water stress tolerance was studied in three contrasting wheat genotypes. Water stress imposed at different stages after anthesis resulted in an increase in lipid peroxidation and a decrease in membrane stability and chlorophyll and carotenoid contents. The antioxidant enzymes ascorbate peroxidase, glutathione reductase and non-specific peroxidase also increased significantly under water stress. Genotype PBW 175, which had highest ascorbate peroxidase, glutathione reductase and peroxidase activity, had the lowest lipid peroxidation (malondialdehyde content) and highest membrane stability and contents of chlorophyll and carotenoids under water stress, while the susceptible genotype WH 542 exhibited the lowest antioxidant enzyme activity, membrane stability and contents of chlorophyll and carotenoids and the highest lipid peroxidation. Genotype HD 2402 showed intermediate behaviour. It seems that drought tolerance of PBW 175, as represented by higher membrane stability and chlorophyll and carotenoid contents and lower lipid peroxidation, is related to its higher antioxidant enzyme activity.
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Claims 12
Claim · model-written summary
Water stress after anthesis increased lipid peroxidation in wheat.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- after anthesise1
- Treatment
- Water stresse1
- Outcome
- lipid peroxidatione1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e1“Water stress imposed at different stages after anthesis resulted in an increase in lipid peroxidation and a decrease in membrane stability and chlorophyll and carotenoid contents”
Claim · model-written summary
Water stress after anthesis decreased membrane stability in wheat.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- after anthesise1
- Treatment
- Water stresse1
- Outcome
- membrane stabilitye1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e1“Water stress imposed at different stages after anthesis resulted in an increase in lipid peroxidation and a decrease in membrane stability and chlorophyll and carotenoid contents”
Claim · model-written summary
Water stress after anthesis decreased chlorophyll and carotenoid contents in wheat.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- after anthesise1
- Treatment
- Water stresse1
- Outcome
- chlorophyll and carotenoid contentse1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e1“Water stress imposed at different stages after anthesis resulted in an increase in lipid peroxidation and a decrease in membrane stability and chlorophyll and carotenoid contents”
Claim · model-written summary
Water stress significantly increased ascorbate peroxidase, glutathione reductase and non-specific peroxidase activity in wheat.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- water stresse2
- Outcome
- ascorbate peroxidase, glutathione reductase and non-specific peroxidasee2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e2“The antioxidant enzymes ascorbate peroxidase, glutathione reductase and non-specific peroxidase also increased significantly under water stress”
Claim · model-written summary
Genotype PBW 175 had the highest antioxidant enzyme activity under water stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW 175e3
- Outcome
- ascorbate peroxidase, glutathione reductase and peroxidase activitye3
- Direction
- higheste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e3“Genotype PBW 175, which had highest ascorbate peroxidase, glutathione reductase and peroxidase activity, had the lowest lipid peroxidation (malondialdehyde content) and highest membrane stability and contents of chlorophyll and carotenoids under water stress”
Claim · model-written summary
Genotype PBW 175 had the lowest lipid peroxidation under water stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW 175e3
- Outcome
- lipid peroxidatione3
- Direction
- loweste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e3“Genotype PBW 175, which had highest ascorbate peroxidase, glutathione reductase and peroxidase activity, had the lowest lipid peroxidation (malondialdehyde content) and highest membrane stability and contents of chlorophyll and carotenoids under water stress”
Claim · model-written summary
Genotype PBW 175 had the highest membrane stability and chlorophyll and carotenoid contents under water stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW 175e3
- Outcome
- membrane stability and contents of chlorophyll and carotenoidse3
- Direction
- higheste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e3“Genotype PBW 175, which had highest ascorbate peroxidase, glutathione reductase and peroxidase activity, had the lowest lipid peroxidation (malondialdehyde content) and highest membrane stability and contents of chlorophyll and carotenoids under water stress”
Claim · model-written summary
Susceptible genotype WH 542 had the lowest antioxidant enzyme activity under water stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- WH 542e4
- Outcome
- antioxidant enzyme activitye4
- Direction
- loweste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e4“while the susceptible genotype WH 542 exhibited the lowest antioxidant enzyme activity, membrane stability and contents of chlorophyll and carotenoids and the highest lipid peroxidation”
Claim · model-written summary
Susceptible genotype WH 542 had the highest lipid peroxidation under water stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- WH 542e4
- Outcome
- lipid peroxidatione4
- Direction
- higheste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e4“while the susceptible genotype WH 542 exhibited the lowest antioxidant enzyme activity, membrane stability and contents of chlorophyll and carotenoids and the highest lipid peroxidation”
Claim · model-written summary
Susceptible genotype WH 542 had the lowest membrane stability and chlorophyll and carotenoid contents under water stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- WH 542e4
- Outcome
- membrane stability and contents of chlorophyll and carotenoidse4
- Direction
- loweste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e4“while the susceptible genotype WH 542 exhibited the lowest antioxidant enzyme activity, membrane stability and contents of chlorophyll and carotenoids and the highest lipid peroxidation”
Claim · model-written summary
Genotype HD 2402 showed intermediate behaviour between the tolerant and susceptible genotypes.
- Taxon
- WheatTriticum aestivumt0
- Material
- HD 2402e5
- Outcome
- behavioure5
- Qualifier
- intermediatee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e5“Genotype HD 2402 showed intermediate behaviour”
Claim · model-written summary
Drought tolerance of PBW 175 is related to its higher antioxidant enzyme activity.
- Taxon
- WheatTriticum aestivumt0
- Material
- PBW 175e6
- Outcome
- drought tolerancee6
- Qualifier
- higher antioxidant enzyme activitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat Genotypes”
e6“drought tolerance of PBW 175, as represented by higher membrane stability and chlorophyll and carotenoid contents and lower lipid peroxidation, is related to its higher antioxidant enzyme activity”
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