Abstract
Thameur, A., Ferchichi, A. and López-Carbonell, M. 2014. Involvement of abscisic acid metabolites and the oxidative status of barley genotypes in response to drought. Can. J. Plant Sci. 94: 1481-1490. Endogenous concentrations of free abscisic acid (ABA), abscisic acid glucosyl ester (ABAGE), phaseic acid (PA), dihydrophaseic acid (DPA) and 7'-hydroxy ABA (7'-OH ABA) were analysed by means of a LC-MS/MS system in five genotypes of barley (Hordeum vulgare L.) grown under well-watered and drought stress conditions. For this purpose a drought treatment was conducted using genotypes: ‘Ardahoui’, ‘Manel’, ‘Pakistan’, ‘Rihane’ and ‘Roho’. Our results show that free and conjugated ABA levels increased in all genotypes grown under water stress, except in Manel genotype, in which ABAGE levels were the lowest. In contrast, genotypes Ardhaoui and Roho showed the highest ABA and ABAGE levels. Nevertheless, drought Rihane plants showed the maximum ability to increase the endogenous ABA concentrations. PA, DPA and 7'-OH ABA increased also in all drought genotypes, especially in the leaves of Manel and Roho genotypes, while the highest ability to increase the endogenous PA content corresponded to genotypes Ardahoui and Pakistan. To evaluate the plant oxidative status, some antioxidant compounds were analysed. Under drought conditions, small changes in some of them were seen. Among the genotypes studied, Manel was the only one which did not show increases in malondialdehyde (MDA) and, in parallel, showed a decrease in ABAGE content. These results provide us valuable information and contribute to the knowledge of the different responses of these genotypes to drought stress.
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Claims 9
Claim · model-written summary
Free and conjugated ABA levels increased under water stress in all barley genotypes except Manel.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- water stresse0
- Outcome
- free and conjugated ABA levelse0
- Direction
- increasede0
- Comparator
- well-waterede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“barley”
e0“Our results show that free and conjugated ABA levels increased in all genotypes grown under water stress, except in Manel genotype, in which ABAGE levels were the lowest”
e1“grown under well-watered and drought stress conditions”
Claim · model-written summary
In Manel, ABAGE levels were the lowest among the barley genotypes.
- Taxon
- barleyHordeum vulgaret0
- Material
- Manele0
- Outcome
- ABAGE levelse0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“Our results show that free and conjugated ABA levels increased in all genotypes grown under water stress, except in Manel genotype, in which ABAGE levels were the lowest”
Claim · model-written summary
Genotypes Ardhaoui and Roho showed the highest ABA and ABAGE levels.
- Taxon
- barleyHordeum vulgaret0
- Material
- Ardhaoui and Rohoe0
- Outcome
- ABA and ABAGE levelse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“In contrast, genotypes Ardhaoui and Roho showed the highest ABA and ABAGE levels”
Claim · model-written summary
Drought-stressed Rihane plants showed the maximum ability to increase endogenous ABA concentrations.
- Taxon
- barleyHordeum vulgaret0
- Material
- Rihanee0
- Treatment
- droughte0
- Outcome
- endogenous ABA concentrationse0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“Nevertheless, drought Rihane plants showed the maximum ability to increase the endogenous ABA concentrations”
Claim · model-written summary
PA, DPA and 7'-OH ABA increased under drought in all genotypes, most strongly in the leaves of Manel and Roho.
- Taxon
- barleyHordeum vulgaret0
- Material
- Manel and Rohoe0
- Organ / stage
- leavese0
- Treatment
- droughte0
- Outcome
- PA, DPA and 7'-OH ABAe0
- Direction
- increasede0
- Qualifier
- especially in the leaves of Manel and Roho genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“PA, DPA and 7'-OH ABA increased also in all drought genotypes, especially in the leaves of Manel and Roho genotypes”
Claim · model-written summary
The highest ability to increase endogenous PA content under drought was found in Ardahoui and Pakistan.
- Taxon
- barleyHordeum vulgaret0
- Material
- Ardahoui and Pakistane0
- Outcome
- endogenous PA contente0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“the highest ability to increase the endogenous PA content corresponded to genotypes Ardahoui and Pakistan”
Claim · model-written summary
Under drought, antioxidant compounds showed only small changes.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- drought conditionse2
- Outcome
- antioxidant compoundse1
- Qualifier
- small changese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e1“some antioxidant compounds were analysed”
e2“Under drought conditions, small changes in some of them were seen”
Claim · model-written summary
Manel was the only genotype that did not show increases in malondialdehyde (MDA) under drought.
- Taxon
- barleyHordeum vulgaret0
- Material
- Manele3
- Outcome
- malondialdehyde (MDA)e3
- Direction
- did not show increasese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e3“Manel was the only one which did not show increases in malondialdehyde (MDA) and, in parallel, showed a decrease in ABAGE content”
Claim · model-written summary
Manel showed a decrease in ABAGE content under drought.
- Taxon
- barleyHordeum vulgaret0
- Material
- Manele3
- Outcome
- ABAGE contente3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e3“Manel was the only one which did not show increases in malondialdehyde (MDA) and, in parallel, showed a decrease in ABAGE content”