Abstract
In this study, the positive role of hydrogen peroxide (H2O2) pretreatment in mitigating the adverse impacts of seawater stress has been evaluated in two wheat (Triticum aestivum L.) cultivars, namely Gemmiza 11 as a salt-sensitive and Misr 1 as a salt-tolerant cultivar, with contrasting phenotypes in response to the salinity stress. Under normal conditions, wheat seeds eustress with H2O2 have shown significant effects on the improvement of plant growth parameters, such as dry weight and root and shoot lengths. Under salt stress conditions, seeds eustress with H2O2 have shown a reduction in damage to plant growth and physiological parameters as compared to the seeds kept as un-primed in both wheat cultivars. In addition, eustress of seeds with H2O2 has induced an increment in the pigments content, proline level and mineral uptake (K+, Ca2+ and Mg2+). Moreover, seeds eustress with H2O2 have shown significant decrement in Na+ content uptake in plants and that subsequently reduced lipid peroxidation. Seawater stress has increased the activity of the antioxidant system based on catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX) in both cultivars, except POD in Gemmiza 11. Similarly, the application of H2O2 has further enhanced the activity of the antioxidant system in stressed plants and this enhancement of the antioxidant system further reduced Na+ content in plants and subsequently increased the growth parameters. Results of inter-simple sequence repeat (ISSR) markers have shown clear differentiation among the treatments and have provided strong evidence in support of the hypothesis proposed in this study that H2O2 eustress improves seed tolerance and enhances plant growth parameters under seawater stress.
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Claims 10
Claim · model-written summary
H2O2 seed eustress significantly improved dry weight and root and shoot lengths under normal conditions.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- eustress with H2O2e0
- Outcome
- dry weight and root and shoot lengthse0
- Direction
- improvemente0
- Qualifier
- Under normal conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under normal conditions, wheat seeds eustress with H2O2 have shown significant effects on the improvement of plant growth parameters, such as dry weight and root and shoot lengths.”
Claim · model-written summary
H2O2 seed eustress reduced damage to growth and physiological parameters under salt stress in both cultivars relative to unprimed seeds.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- eustress with H2O2e0
- Outcome
- damage to plant growth and physiological parameterse0
- Direction
- reductione0
- Qualifier
- Under salt stress conditionse0
- Comparator
- seeds kept as un-primede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress conditions, seeds eustress with H2O2 have shown a reduction in damage to plant growth and physiological parameters as compared to the seeds kept as un-primed in both wheat cultivars.”
t0“Wheat”
Claim · model-written summary
H2O2 seed eustress increased pigment content and proline level.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- eustress of seeds with H2O2e0
- Outcome
- pigments content, proline levele0
- Direction
- incremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“eustress of seeds with H2O2 has induced an increment in the pigments content, proline level and mineral uptake (K+, Ca2+ and Mg2+).”
t0“Wheat”
Claim · model-written summary
H2O2 seed eustress increased K+, Ca2+ and Mg2+ uptake.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- eustress of seeds with H2O2e0
- Outcome
- mineral uptake (K+, Ca2+ and Mg2+)e0
- Direction
- incremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“eustress of seeds with H2O2 has induced an increment in the pigments content, proline level and mineral uptake (K+, Ca2+ and Mg2+).”
t0“Wheat”
Claim · model-written summary
H2O2 seed eustress significantly decreased plant Na+ uptake.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- eustress with H2O2e0
- Outcome
- Na+ content uptake in plantse0
- Direction
- decremente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeds eustress with H2O2 have shown significant decrement in Na+ content uptake in plants and that subsequently reduced lipid peroxidation.”
t0“Wheat”
Claim · model-written summary
H2O2 seed eustress reduced lipid peroxidation after decreasing Na+ uptake.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- eustress with H2O2e0
- Outcome
- lipid peroxidatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeds eustress with H2O2 have shown significant decrement in Na+ content uptake in plants and that subsequently reduced lipid peroxidation.”
t0“Wheat”
Claim · model-written summary
Seawater stress increased catalase and ascorbate peroxidase activity in both cultivars.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Seawater stresse0
- Outcome
- catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX)e0
- Direction
- increasede0
- Qualifier
- except POD in Gemmiza 11e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seawater stress has increased the activity of the antioxidant system based on catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX) in both cultivars, except POD in Gemmiza 11.”
t0“Wheat”
Claim · model-written summary
Seawater stress increased peroxidase activity in Misr 1 but not Gemmiza 11.
- Taxon
- WheatTriticum aestivumt0
- Material
- Misr 1e1
- Treatment
- Seawater stresse0
- Outcome
- peroxidase (POD)e0
- Direction
- increasede0
- Qualifier
- except POD in Gemmiza 11e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seawater stress has increased the activity of the antioxidant system based on catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX) in both cultivars, except POD in Gemmiza 11.”
e1“namely Gemmiza 11 as a salt-sensitive and Misr 1 as a salt-tolerant cultivar”
t0“Wheat”
Claim · model-written summary
H2O2 application further enhanced antioxidant system activity in stressed plants.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- application of H2O2e0
- Outcome
- activity of the antioxidant systeme0
- Direction
- enhancede0
- Qualifier
- stressed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of H2O2 has further enhanced the activity of the antioxidant system in stressed plants”
t0“Wheat”
Claim · model-written summary
ISSR markers clearly differentiated the wheat treatments.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- clear differentiation among the treatmentse0
- Comparator
- the treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results of inter-simple sequence repeat (ISSR) markers have shown clear differentiation among the treatments”
t0“Wheat”
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