Abstract
The influence of one-minute hardening heating at 42 degrees C on the dynamics of hydrogen peroxide generation and activity of antioxidant enzymes in roots of winter wheat seedlings has been investigated. It was shown that the content of hydrogen peroxide increased within the first 30 minutes after heat influence, whereupon it approached the level of control variant. The activity of superoxide dismutase (SOD) increased significantly within 10 min after heating and was maintained at a high level during 24 hours of observation. The activity of ascorbate peroxidase and guaiacol peroxidase increased after 3-6 hours after the hardening and reached its maximum after 24 hours, when there was the most significant increase in heat resistance of seedlings. The short-term increase in hydrogen peroxide content caused by hardening heating was suppressed by treatment of seedlings with H2O2 scavenger dimethylthiourea, inhibitors of NADPH-oxidase (imidazole) and SOD (sodium diethyldithiocarbamate). All these effectors levelled the increase of activity of ascorbate peroxidase and guaiacol peroxidase and significantly inhibited the development of heat resistance of seedlings. The conclusion was made about the role of hydrogen peroxide produced with the participation of NADPH-oxidase and SOD in the induction of antioxidant system by heat hardening of wheat seedlings.
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Claims 12
Claim · model-written summary
Hydrogen peroxide content rose in wheat seedlings within 30 minutes of heating.
- Taxon
- wheat seedlings
Triticum aestivumt0 - Treatment
- heat influencee0
- Outcome
- content of hydrogen peroxidee0
- Direction
- increasede0
- Qualifier
- within the first 30 minutese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content of hydrogen peroxide increased within the first 30 minutes after heat influence”
t0“wheat seedlings”
Claim · model-written summary
Hydrogen peroxide subsequently approached the control level.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Outcome
- level of control variante0
- Comparator
- control variante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereupon it approached the level of control variant.”
t0“wheat seedlings”
Claim · model-written summary
Superoxide dismutase activity rose significantly within 10 minutes and stayed high for 24 hours.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- heatinge0
- Outcome
- activity of superoxide dismutase (SOD)e0
- Direction
- increasede0
- Qualifier
- during 24 hours of observatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of superoxide dismutase (SOD) increased significantly within 10 min after heating and was maintained at a high level during 24 hours of observation.”
t0“wheat seedlings”
Claim · model-written summary
Ascorbate peroxidase activity rose after 3–6 hours and peaked at 24 hours.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- the hardeninge0
- Outcome
- activity of ascorbate peroxidasee0
- Direction
- increasede0
- Qualifier
- after 3-6 hourse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of ascorbate peroxidase and guaiacol peroxidase increased after 3-6 hours after the hardening and reached its maximum after 24 hours”
t0“wheat seedlings”
Claim · model-written summary
Guaiacol peroxidase activity rose after 3–6 hours and peaked at 24 hours.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- the hardeninge0
- Outcome
- activity of ascorbate peroxidase and guaiacol peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of ascorbate peroxidase and guaiacol peroxidase increased after 3-6 hours after the hardening and reached its maximum after 24 hours”
t0“wheat seedlings”
Claim · model-written summary
Seedling heat resistance rose most strongly after 24 hours.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Outcome
- heat resistance of seedlingse0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when there was the most significant increase in heat resistance of seedlings.”
t0“wheat seedlings”
Claim · model-written summary
Dimethylthiourea suppressed the heat-induced rise in hydrogen peroxide.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- H2O2 scavenger dimethylthioureae0
- Outcome
- increase in hydrogen peroxide contente0
- Direction
- suppressede0
- Comparator
- hardening heatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The short-term increase in hydrogen peroxide content caused by hardening heating was suppressed by treatment of seedlings with H2O2 scavenger dimethylthiourea”
t0“wheat seedlings”
Claim · model-written summary
Imidazole suppressed the heat-induced rise in hydrogen peroxide.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- imidazolee0
- Outcome
- increase in hydrogen peroxide contente0
- Direction
- suppressede0
- Comparator
- hardening heatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The short-term increase in hydrogen peroxide content caused by hardening heating was suppressed by treatment of seedlings with H2O2 scavenger dimethylthiourea, inhibitors of NADPH-oxidase (imidazole) and SOD (sodium diethyldithiocarbamate).”
t0“wheat seedlings”
Claim · model-written summary
Sodium diethyldithiocarbamate suppressed the heat-induced rise in hydrogen peroxide.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- sodium diethyldithiocarbamatee0
- Outcome
- increase in hydrogen peroxide contente0
- Direction
- suppressede0
- Comparator
- hardening heatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The short-term increase in hydrogen peroxide content caused by hardening heating was suppressed by treatment of seedlings with H2O2 scavenger dimethylthiourea, inhibitors of NADPH-oxidase (imidazole) and SOD (sodium diethyldithiocarbamate).”
t0“wheat seedlings”
Claim · model-written summary
The effectors eliminated the rise in peroxidase activities.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- All these effectorse0
- Outcome
- activity of ascorbate peroxidase and guaiacol peroxidasee0
- Direction
- levellede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All these effectors levelled the increase of activity of ascorbate peroxidase and guaiacol peroxidase”
t0“wheat seedlings”
Claim · model-written summary
The effectors significantly inhibited development of seedling heat resistance.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- All these effectorse0
- Outcome
- development of heat resistance of seedlingse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All these effectors levelled the increase of activity of ascorbate peroxidase and guaiacol peroxidase and significantly inhibited the development of heat resistance of seedlings.”
t0“wheat seedlings”
Claim · model-written summary
The authors attributed antioxidant induction by heat hardening to hydrogen peroxide generated with NADPH-oxidase and SOD.
- Taxon
- wheat seedlingsTriticum aestivume0
- Gene
- NADPH-oxidase and SODe0
- Compound
- hydrogen peroxidee0
- Outcome
- induction of antioxidant systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the role of hydrogen peroxide produced with the participation of NADPH-oxidase and SOD in the induction of antioxidant system by heat hardening of wheat seedlings.”
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See all 10 papers →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.