Abstract
Hydrogen peroxide (H(2) O(2) ) is a key reactive oxygen species (ROS) in signal transduction pathways leading to activation of plant defenses against biotic and abiotic stresses. In this study, we investigated the effects of H(2) O(2) pretreatment on aluminum (Al) induced antioxidant responses in root tips of two wheat (Triticum aestivum L.) genotypes, Yangmai-5 (Al-sensitive) and Jian-864 (Al-tolerant). Al increased accumulation of H(2) O(2) and O(2) (•-) leading to more predominant lipid peroxidation, programmed cell death and root elongation inhibition in Yangmai-5 than in Jian-864. However, H(2) O(2) pretreatment alleviated Al-induced deleterious effects in both genotypes. Under Al stress, H(2) O(2) pretreatment increased the activities of superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and monodehydroascorbate reductase, glutathione reductase and glutathione peroxidase as well as the levels of ascorbate and glutathione more significantly in Yangmai-5 than in Jian-864. Furthermore, H(2) O(2) pretreatment also increased the total antioxidant capacity evaluated as the 2, 2-diphenyl-1-picrylhydrazyl-radical scavenging activity and the ferric reducing/antioxidant power more significantly in Yangmai-5 than in Jian-864. Therefore, we conclude that H(2) O(2) pretreatment improves wheat Al acclimation during subsequent Al exposure by enhancing the antioxidant defense capacity, which prevents ROS accumulation, and that the enhancement is greater in the Al-sensitive genotype than in the Al-tolerant genotype.
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Claims 9
Claim · model-written summary
Aluminum increased H2O2 and superoxide accumulation in Yangmai-5 wheat root tips.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- Yangmai-5e1
- Treatment
- Ale1
- Outcome
- accumulation of H(2) O(2)e1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Al increased accumulation of H(2) O(2) and O(2) (•-) leading to more predominant lipid peroxidation, programmed cell death and root elongation inhibition in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
Aluminum produced more predominant lipid peroxidation, programmed cell death and root elongation inhibition in Yangmai-5 than in Jian-864.
- Taxon
- WheatTriticum aestivumt0
- Material
- Yangmai-5e1
- Treatment
- Ale1
- Outcome
- lipid peroxidation, programmed cell death and root elongation inhibitione1
- Direction
- more predominante1
- Comparator
- Jian-864e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Al increased accumulation of H(2) O(2) and O(2) (•-) leading to more predominant lipid peroxidation, programmed cell death and root elongation inhibition in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
H2O2 pretreatment alleviated Al-induced deleterious effects in both wheat genotypes.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- H(2) O(2) pretreatmente2
- Outcome
- deleterious effectse2
- Direction
- alleviatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“However, H(2) O(2) pretreatment alleviated Al-induced deleterious effects in both genotypes”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
Under Al stress, H2O2 pretreatment increased superoxide dismutase, catalase and peroxidase activities more in Yangmai-5 than in Jian-864.
- Taxon
- WheatTriticum aestivumt0
- Material
- Yangmai-5e3
- Treatment
- H(2) O(2) pretreatmente3
- Outcome
- superoxide dismutase, catalase, peroxidasee3
- Direction
- increasede3
- Comparator
- Jian-864e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Under Al stress, H(2) O(2) pretreatment increased the activities of superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and monodehydroascorbate reductase, glutathione reductase and glutathione peroxidase as well as the levels of ascorbate and glutathione more significantly in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
Under Al stress, H2O2 pretreatment increased ascorbate peroxidase and monodehydroascorbate reductase activities more in Yangmai-5 than in Jian-864.
- Taxon
- WheatTriticum aestivumt0
- Material
- Yangmai-5e3
- Treatment
- H(2) O(2) pretreatmente3
- Outcome
- ascorbate peroxidase and monodehydroascorbate reductasee3
- Direction
- increasede3
- Comparator
- Jian-864e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Under Al stress, H(2) O(2) pretreatment increased the activities of superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and monodehydroascorbate reductase, glutathione reductase and glutathione peroxidase as well as the levels of ascorbate and glutathione more significantly in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
Under Al stress, H2O2 pretreatment increased glutathione reductase and glutathione peroxidase activities more in Yangmai-5 than in Jian-864.
- Taxon
- WheatTriticum aestivumt0
- Material
- Yangmai-5e3
- Treatment
- H(2) O(2) pretreatmente3
- Outcome
- glutathione reductase and glutathione peroxidasee3
- Direction
- increasede3
- Comparator
- Jian-864e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Under Al stress, H(2) O(2) pretreatment increased the activities of superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and monodehydroascorbate reductase, glutathione reductase and glutathione peroxidase as well as the levels of ascorbate and glutathione more significantly in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
Under Al stress, H2O2 pretreatment increased ascorbate and glutathione levels more in Yangmai-5 than in Jian-864.
- Taxon
- WheatTriticum aestivumt0
- Material
- Yangmai-5e3
- Treatment
- H(2) O(2) pretreatmente3
- Outcome
- levels of ascorbate and glutathionee3
- Direction
- increasede3
- Comparator
- Jian-864e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Under Al stress, H(2) O(2) pretreatment increased the activities of superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and monodehydroascorbate reductase, glutathione reductase and glutathione peroxidase as well as the levels of ascorbate and glutathione more significantly in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
H2O2 pretreatment increased total antioxidant capacity more in Yangmai-5 than in Jian-864.
- Taxon
- WheatTriticum aestivumt0
- Material
- Yangmai-5e4
- Treatment
- H(2) O(2) pretreatmente4
- Outcome
- total antioxidant capacitye4
- Direction
- increasede4
- Qualifier
- 2, 2-diphenyl-1-picrylhydrazyl-radical scavenging activity and the ferric reducing/antioxidant powere4
- Comparator
- Jian-864e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Furthermore, H(2) O(2) pretreatment also increased the total antioxidant capacity evaluated as the 2, 2-diphenyl-1-picrylhydrazyl-radical scavenging activity and the ferric reducing/antioxidant power more significantly in Yangmai-5 than in Jian-864”
t0“Oxidative Stress in Wheat Seedlings”
Claim · model-written summary
H2O2 pretreatment is concluded to improve wheat Al acclimation by enhancing antioxidant defense, which prevents ROS accumulation.
- Taxon
- wheatTriticum aestivume5
- Treatment
- H(2) O(2) pretreatmente5
- Outcome
- ROS accumulatione5
- Qualifier
- enhancing the antioxidant defense capacitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“we conclude that H(2) O(2) pretreatment improves wheat Al acclimation during subsequent Al exposure by enhancing the antioxidant defense capacity, which prevents ROS accumulation”
t0“Oxidative Stress in Wheat Seedlings”
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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.