Abstract
The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field. Cotton was grown under full irrigation and severe‐to‐moderate water deficits in both years of the study. The amount and form of glutathione (5‐L‐glutamyl‐L‐cysteinylglycine) were monitored in both years, while the antioxidant enzymes ascorbate peroxidase and glutathione reductase, the amount of ascorbate, and the amount of malondialdehyde (MDA) were monitored in the second year of the study. The amount of glutathione varied (> 2×) during the sampling interval, though there was no effect of water treatment on the variation. The ratio of reduced/oxidized glutathione varied seasonally, but not in response to water deficits. Gluthione reductase activity varied (≈ 5×) seasonally, but again not in response to water deficits. The amount of ascorbate and the activity of ascorbate peroxidase were increased under water stress (≈ 5× and 1.5×, respectively). The amount of MDA (an indicator of oxidative damage) varied seasonally (≈ 2×), though not in response to water stress. While glutathione metabolism appears sufficient for oxidative stresses resulting from field‐water deficits, altered ascorbate metabolism may be a response to water deficits in the field. Malondialdehyde amount did not increase with water stress, suggesting that antioxidant metabolism was sufficient for the oxidative stresses. It is apparent that antioxidant metabolism in these plants exposed to water deficits under production conditions was sufficient to protect against oxidative damage.
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Claims 8
Claim · model-written summary
Glutathione amount did not respond to the water treatment in field cotton.
- Taxon
- Gossypium hirsutum
Gossypium hirsutume0 - Treatment
- water treatmente2
- Outcome
- amount of glutathionee2
- Direction
- no effecte2
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e1“Cotton was grown under full irrigation and severe‐to‐moderate water deficits in both years of the study”
e2“The amount of glutathione varied (> 2×) during the sampling interval, though there was no effect of water treatment on the variation”
Claim · model-written summary
Glutathione amount varied more than twofold during the sampling interval.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Outcome
- amount of glutathionee2
- Value
- > 2×e2
- Qualifier
- during the sampling intervale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e2“The amount of glutathione varied (> 2×) during the sampling interval, though there was no effect of water treatment on the variation”
Claim · model-written summary
The reduced/oxidized glutathione ratio varied seasonally but did not respond to water deficits.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- water deficitse3
- Outcome
- ratio of reduced/oxidized glutathionee3
- Direction
- no_changeinferrede3
- Qualifier
- varied seasonallye3
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e1“Cotton was grown under full irrigation and severe‐to‐moderate water deficits in both years of the study”
e3“The ratio of reduced/oxidized glutathione varied seasonally, but not in response to water deficits”
Claim · model-written summary
Glutathione reductase activity varied about fivefold seasonally but did not respond to water deficits.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- water deficitse4
- Outcome
- reductase activitye4
- Direction
- no_changeinferrede4
- Value
- ≈ 5×e4
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e1“Cotton was grown under full irrigation and severe‐to‐moderate water deficits in both years of the study”
e4“Gluthione reductase activity varied (≈ 5×) seasonally, but again not in response to water deficits”
Claim · model-written summary
Ascorbate amount increased under water stress, by about fivefold.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- water stresse5
- Outcome
- amount of ascorbatee5
- Direction
- increasede5
- Value
- ≈ 5×e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e5“The amount of ascorbate and the activity of ascorbate peroxidase were increased under water stress (≈ 5× and 1.5×, respectively)”
Claim · model-written summary
Ascorbate peroxidase activity increased under water stress, by about 1.5-fold.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- water stresse5
- Outcome
- activity of ascorbate peroxidasee5
- Direction
- increasede5
- Value
- 1.5×e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e5“The amount of ascorbate and the activity of ascorbate peroxidase were increased under water stress (≈ 5× and 1.5×, respectively)”
Claim · model-written summary
Malondialdehyde amount varied seasonally by about twofold and did not respond to water stress.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- water stresse6
- Outcome
- amount of MDAe6
- Direction
- no_changeinferrede6
- Value
- ≈ 2×e6
- Qualifier
- varied seasonallye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e6“The amount of MDA (an indicator of oxidative damage) varied seasonally (≈ 2×), though not in response to water stress”
Claim · model-written summary
Antioxidant metabolism under production-condition water deficits was sufficient to protect cotton against oxidative damage.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Outcome
- oxidative damagee1
- Qualifier
- under production conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The goal of this study was to identify water‐stress‐related limitations in the antioxidant protection in cotton ( Gossypium hirsutum L.) in the field”
e1“It is apparent that antioxidant metabolism in these plants exposed to water deficits under production conditions was sufficient to protect against oxidative damage”
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