Abstract
The role of hydrogen sulfide (H2S) as a signaling mediator-gasotransmitter in the thermoresistance of plant cells remains poorly understood. The participation of endogenous hydrogen sulfide in heat resistance formation of wheat seedlings (Triticum aestivum L.) caused by short-term exposure to high temperatures was studied. After a 1-min exposure to a temperature of 42°C in roots of wheat seedlings, a transient increase in hydrogen sulfide with a maximum of 1.5 h after heating was observed. At the same time, 24 h after exposure to high temperature, the H2S content in roots decreased to the level of control. The effect of increasing the content of hydrogen sulfide caused by the action of the hardening temperature did not manifest under the treatment of seedlings with scavenger hypotaurine and the inhibitor of L-cysteine desulfhydrase sodium pyruvate. The hardening heating of seedlings caused a rapid increase in the activity of superoxide dismutase (SOD) in the roots and a gradual increase in the activity of catalase and guaiacol peroxidase. The maximum effect of changing the activity of these antioxidant enzymes was observed 24 h after exposure to the hardening temperature. The treatment of seedlings with hypotaurine and sodium pyruvate before hardening heating eliminated the effect of increasing the activity of catalase and guaiacol peroxidase but hardly affected SOD activity. Damaging heating (45°C, 10 min) of seedlings caused an increase in the content of lipid peroxidation (LPO) products in root cells and the subsequent death of a significant part of the seedlings. The preliminary hardening heating significantly increased the heat resistance, decreasing the LPO intensity and the level of seedling death. At the same time, their treatment with the hydrogen sulfide scavenger hypotaurine and the inhibitor of L-cysteine desulfhydrase sodium pyruvate largely neutralized the development of heat resistance caused by hardening heating. A conclusion was made about the role of hydrogen sulfide as a signaling mediator in the regulation of the antioxidant system and the development of seedlings' heat resistance under the action of a hardening temperature.
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Claims 15
Claim · model-written summary
Heating transiently raised root hydrogen sulfide, peaking 1.5 hours afterward.
- Taxon
- wheat seedlings
Triticum aestivume0 - Organ / stage
- rootse0
- Treatment
- 1-min exposure to a temperature of 42°Ce0
- Outcome
- hydrogen sulfidee0
- Direction
- transient increasee0
- Value
- 1.5 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After a 1-min exposure to a temperature of 42°C in roots of wheat seedlings, a transient increase in hydrogen sulfide with a maximum of 1.5 h after heating was observed.”
Claim · model-written summary
Root H2S returned to the control level after 24 hours.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Outcome
- H2S content in rootse0
- Direction
- decreasede0
- Value
- 24 he0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“24 h after exposure to high temperature, the H2S content in roots decreased to the level of control.”
t0“wheat seedlings”
Claim · model-written summary
Hypotaurine and sodium pyruvate prevented the heating-induced hydrogen sulfide rise.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- hypotaurine and the inhibitor of L-cysteine desulfhydrase sodium pyruvatee0
- Outcome
- content of hydrogen sulfidee0
- Direction
- did not manifeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of increasing the content of hydrogen sulfide caused by the action of the hardening temperature did not manifest under the treatment of seedlings with scavenger hypotaurine and the inhibitor of L-cysteine desulfhydrase sodium pyruvate.”
t0“wheat seedlings”
Claim · model-written summary
Hardening rapidly increased root SOD activity.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Organ / stage
- rootse0
- Treatment
- hardening heatinge0
- Gene
- superoxide dismutase (SOD)e0
- Outcome
- activity of superoxide dismutase (SOD)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hardening heating of seedlings caused a rapid increase in the activity of superoxide dismutase (SOD) in the roots”
t0“wheat seedlings”
Claim · model-written summary
Hardening gradually increased catalase and guaiacol peroxidase activity.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- hardening heatinge1
- Gene
- catalase and guaiacol peroxidasee0
- Outcome
- activity of catalase and guaiacol peroxidasee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a gradual increase in the activity of catalase and guaiacol peroxidase.”
e1“The hardening heating of seedlings caused a rapid increase”
t0“wheat seedlings”
Claim · model-written summary
Antioxidant-enzyme activity changes peaked 24 hours after hardening.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Outcome
- maximum effect of changing the activity of these antioxidant enzymese0
- Value
- 24 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum effect of changing the activity of these antioxidant enzymes was observed 24 h after exposure to the hardening temperature.”
t0“wheat seedlings”
Claim · model-written summary
Hypotaurine and sodium pyruvate eliminated catalase and peroxidase activation.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- hypotaurine and sodium pyruvatee0
- Outcome
- activity of catalase and guaiacol peroxidasee0
- Direction
- eliminatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment of seedlings with hypotaurine and sodium pyruvate before hardening heating eliminated the effect of increasing the activity of catalase and guaiacol peroxidase but hardly affected SOD activity.”
t0“wheat seedlings”
Claim · model-written summary
Hypotaurine and sodium pyruvate hardly affected SOD activity.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- hypotaurine and sodium pyruvatee0
- Outcome
- SOD activitye0
- Direction
- hardly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment of seedlings with hypotaurine and sodium pyruvate before hardening heating eliminated the effect of increasing the activity of catalase and guaiacol peroxidase but hardly affected SOD activity.”
t0“wheat seedlings”
Claim · model-written summary
Damaging heating increased root-cell lipid peroxidation products.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Organ / stage
- root cellse0
- Treatment
- Damaging heating (45°C, 10 min)e0
- Outcome
- content of lipid peroxidation (LPO) productse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Damaging heating (45°C, 10 min) of seedlings caused an increase in the content of lipid peroxidation (LPO) products in root cells and the subsequent death of a significant part of the seedlings.”
t0“wheat seedlings”
Claim · model-written summary
Damaging heating killed a significant proportion of seedlings.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- Damaging heating (45°C, 10 min)e0
- Outcome
- death of a significant part of the seedlingse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Damaging heating (45°C, 10 min) of seedlings caused an increase in the content of lipid peroxidation (LPO) products in root cells and the subsequent death of a significant part of the seedlings.”
t0“wheat seedlings”
Claim · model-written summary
Preliminary hardening significantly increased heat resistance.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- preliminary hardening heatinge0
- Outcome
- heat resistancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The preliminary hardening heating significantly increased the heat resistance, decreasing the LPO intensity and the level of seedling death.”
t0“wheat seedlings”
Claim · model-written summary
Preliminary hardening decreased lipid peroxidation intensity.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- preliminary hardening heatinge0
- Outcome
- LPO intensitye0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The preliminary hardening heating significantly increased the heat resistance, decreasing the LPO intensity and the level of seedling death.”
t0“wheat seedlings”
Claim · model-written summary
Preliminary hardening decreased seedling death.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- preliminary hardening heatinge0
- Outcome
- level of seedling deathe0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The preliminary hardening heating significantly increased the heat resistance, decreasing the LPO intensity and the level of seedling death.”
t0“wheat seedlings”
Claim · model-written summary
Hypotaurine and sodium pyruvate largely neutralized hardening-induced heat resistance.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Treatment
- hypotaurine and the inhibitor of L-cysteine desulfhydrase sodium pyruvatee0
- Outcome
- development of heat resistancee0
- Direction
- neutralizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their treatment with the hydrogen sulfide scavenger hypotaurine and the inhibitor of L-cysteine desulfhydrase sodium pyruvate largely neutralized the development of heat resistance caused by hardening heating.”
t0“wheat seedlings”
Claim · model-written summary
Authors infer that hydrogen sulfide signals antioxidant regulation and heat resistance under hardening.
- Taxon
- wheat seedlingsTriticum aestivumt0
- Compound
- hydrogen sulfidee0
- Outcome
- development of seedlings' heat resistancee0
- Qualifier
- signaling mediatore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the role of hydrogen sulfide as a signaling mediator in the regulation of the antioxidant system and the development of seedlings' heat resistance under the action of a hardening temperature.”
t0“wheat seedlings”
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See all 5 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.