Abstract
Abstract From a field experiment, the changes in oxidative stress and antioxidant enzyme activities were studied in six Spanish peanut cultivars subjected to 25−30 days of water deficit stress at two different stages: pegging and pod development stages. Imposition of water deficit stress significantly reduced relative water content, membrane stability and total carotenoid content in all the cultivars, whereas total chlorophyll content increased at pegging stage but decreased at pod developmental stage. Chlorophyll a/b ratio increased under water deficit stress in most of the cultivars suggesting a greater damage to chlorophyll b rather than an increase in chlorophyll a content. Oxidative stress measured in terms of H 2 O 2 , superoxide radical content and lipid peroxidation increased under water deficit stress, especially in susceptible cultivars such as DRG 1, AK 159 and ICGV 86031. Relationship among different physiological parameters showed that the level of oxidative stress, in terms of production of reactive oxygen species, was negatively correlated with activities of different antioxidant enzymes such as superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase. In conclusion, the study shows that water deficit stress at pod development stage proved to be more detrimental than at pegging stage. The higher activities of antioxidant enzymes in the tolerant cultivars like ICGS 44 and TAG 24 were responsible for protection of oxidative damage and thus provide better tolerance to water deficit stress.
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Claims 10
Claim · model-written summary
Water deficit stress significantly reduced relative water content, membrane stability and total carotenoid content in six peanut cultivars in the field.
- Taxon
- Arachis hypogaea
Arachis hypogaeat0 - Material
- six Spanish peanut cultivarse0
- Treatment
- water deficit stresse1
- Outcome
- relative water content, membrane stability and total carotenoid contente1
- Direction
- reducede1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e0“From a field experiment, the changes in oxidative stress and antioxidant enzyme activities were studied in six Spanish peanut cultivars”
e1“Imposition of water deficit stress significantly reduced relative water content, membrane stability and total carotenoid content in all the cultivars”
Claim · model-written summary
Total chlorophyll content increased under water deficit at the pegging stage.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Organ / stage
- pegging stagee2
- Treatment
- water deficit stresse1
- Outcome
- total chlorophyll contente2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e1“Imposition of water deficit stress significantly reduced relative water content, membrane stability and total carotenoid content in all the cultivars”
e2“whereas total chlorophyll content increased at pegging stage but decreased at pod developmental stage”
Claim · model-written summary
Total chlorophyll content decreased under water deficit at the pod development stage.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Organ / stage
- pod developmental stagee2
- Treatment
- water deficit stresse1
- Outcome
- total chlorophyll contente2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e1“Imposition of water deficit stress significantly reduced relative water content, membrane stability and total carotenoid content in all the cultivars”
e2“whereas total chlorophyll content increased at pegging stage but decreased at pod developmental stage”
Claim · model-written summary
Chlorophyll a/b ratio increased under water deficit stress in most peanut cultivars.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Treatment
- water deficit stresse3
- Outcome
- Chlorophyll a/b ratioe3
- Direction
- increasede3
- Qualifier
- in most of the cultivarse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e3“Chlorophyll a/b ratio increased under water deficit stress in most of the cultivars suggesting a greater damage to chlorophyll b rather than an increase in chlorophyll a content”
Claim · model-written summary
The rise in chlorophyll a/b ratio is suggested to reflect greater damage to chlorophyll b than an increase in chlorophyll a under water deficit.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Treatment
- water deficit stresse3
- Outcome
- damage to chlorophyll be3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e3“Chlorophyll a/b ratio increased under water deficit stress in most of the cultivars suggesting a greater damage to chlorophyll b rather than an increase in chlorophyll a content”
Claim · model-written summary
Lipid peroxidation, H2O2 and superoxide radical content increased under water deficit stress, especially in susceptible cultivars DRG 1, AK 159 and ICGV 86031.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Material
- DRG 1, AK 159 and ICGV 86031e4
- Treatment
- water deficit stresse4
- Outcome
- H 2 O 2 , superoxide radical content and lipid peroxidatione4
- Direction
- increasede4
- Qualifier
- especially in susceptible cultivarse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e4“Oxidative stress measured in terms of H 2 O 2 , superoxide radical content and lipid peroxidation increased under water deficit stress, especially in susceptible cultivars such as DRG 1, AK 159 and ICGV 86031”
Claim · model-written summary
The level of oxidative stress was negatively correlated with activities of superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Gene
- superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductasee5
- Outcome
- level of oxidative stresse5
- Direction
- negatively correlatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e5“Relationship among different physiological parameters showed that the level of oxidative stress, in terms of production of reactive oxygen species, was negatively correlated with activities of different antioxidant enzymes such as superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase”
Claim · model-written summary
Water deficit stress at the pod development stage was more detrimental than at the pegging stage.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Organ / stage
- pod development stagee6
- Treatment
- water deficit stresse6
- Outcome
- more detrimentale6
- Direction
- more detrimentale6
- Comparator
- at pegging stagee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e6“water deficit stress at pod development stage proved to be more detrimental than at pegging stage”
Claim · model-written summary
Tolerant peanut cultivars ICGS 44 and TAG 24 had higher antioxidant enzyme activities.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Material
- ICGS 44 and TAG 24e7
- Outcome
- activities of antioxidant enzymese7
- Direction
- highere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e7“The higher activities of antioxidant enzymes in the tolerant cultivars like ICGS 44 and TAG 24 were responsible for protection of oxidative damage and thus provide better tolerance to water deficit stress”
Claim · model-written summary
Higher antioxidant enzyme activities are suggested to protect against oxidative damage and provide better tolerance to water deficit stress.
- Taxon
- Arachis hypogaeaArachis hypogaeat0
- Gene
- antioxidant enzymese7
- Outcome
- better tolerance to water deficit stresse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peanut (Arachis hypogaea L.) cultivars to water deficit stress”
e7“The higher activities of antioxidant enzymes in the tolerant cultivars like ICGS 44 and TAG 24 were responsible for protection of oxidative damage and thus provide better tolerance to water deficit stress”
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