Abstract
The effects of functional interplay of calcium ions, reactive oxygen species (ROS) and nitric oxide (NO) in the cells of wheat plantlets roots (Triticum aestivum L.) at the induction of their heat resistance by a short-term influence of hyperthermia (heating at the temperature of 42 degrees C during 1 minute) have been investigated. The transitional increase of NO and H2O2 content, invoked by heating, was suppressed by the treatment of plantlets with the antagonists of calcium EGTA (chelator of exocellular calcium), lanthanum chloride (blocker of calcium channels of various types) and neomycin (inhibitor of phosphatidylinositol-dependent phospholipase C). The rise of hydrogen peroxide content, caused by hardening, was partially suppressed by the action of inhibitors of nitrate reductase (sodium wolframate) and NO-synthase (N(G)-nitro-L-arginine methyl ester--L-NAME), and the increasing of nitric oxide content was suppressed by the treatment of plants with the antioxidant ionol and with the scavenger of hydrogen peroxide (dimethylthiourea). These compounds and antagonists of calcium also partially removed the effect of the rise of plantlets' heat resistance, invoked by hardening heating. The conclusion on calcium's role in the activation of enzymatic systems, generating reactive oxygen species and nitric oxide, and on the functional interplay of these signal mediators at the induction of heat resistance of plantlets by hardening heating is made.
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Claims 6
Claim · model-written summary
Short heating transiently increased nitric oxide content in wheat roots.
- Taxon
- wheat plantlets
Triticum aestivumt0 - Organ / stage
- rootse1
- Treatment
- heatinge0
- Outcome
- NO and H2O2 contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transitional increase of NO and H2O2 content, invoked by heating, was suppressed by the treatment of plantlets with the antagonists of calcium EGTA”
t0“wheat plantlets”
e1“cells of wheat plantlets roots”
Claim · model-written summary
Short heating transiently increased hydrogen peroxide content in wheat roots.
- Taxon
- wheat plantletsTriticum aestivumt0
- Treatment
- heatinge0
- Outcome
- H2O2 contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transitional increase of NO and H2O2 content, invoked by heating, was suppressed by the treatment of plantlets with the antagonists of calcium EGTA”
t0“wheat plantlets”
Claim · model-written summary
Calcium antagonists suppressed heating-induced nitric oxide and hydrogen peroxide increases.
- Taxon
- wheat plantletsTriticum aestivumt0
- Treatment
- antagonists of calciume0
- Outcome
- NO and H2O2 contente0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transitional increase of NO and H2O2 content, invoked by heating, was suppressed by the treatment of plantlets with the antagonists of calcium EGTA (chelator of exocellular calcium), lanthanum chloride (blocker of calcium channels of various types) and neomycin (inhibitor of phosphatidylinositol-dependent phospholipase C).”
t0“wheat plantlets”
Claim · model-written summary
Nitrate reductase and NO-synthase inhibitors partly suppressed the hardening-induced hydrogen peroxide increase.
- Taxon
- wheat plantletsTriticum aestivumt0
- Treatment
- inhibitors of nitrate reductasee0
- Outcome
- hydrogen peroxide contente0
- Direction
- suppressede0
- Qualifier
- partiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rise of hydrogen peroxide content, caused by hardening, was partially suppressed by the action of inhibitors of nitrate reductase (sodium wolframate) and NO-synthase (N(G)-nitro-L-arginine methyl ester--L-NAME)”
t0“wheat plantlets”
Claim · model-written summary
Antioxidant ionol and hydrogen peroxide scavenger dimethylthiourea suppressed the nitric oxide increase.
- Taxon
- wheat plantletsTriticum aestivumt0
- Treatment
- antioxidant ionole0
- Outcome
- nitric oxide contente0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increasing of nitric oxide content was suppressed by the treatment of plants with the antioxidant ionol and with the scavenger of hydrogen peroxide (dimethylthiourea).”
t0“wheat plantlets”
Claim · model-written summary
These compounds and calcium antagonists partially removed the heating-induced increase in plantlet heat resistance.
- Taxon
- wheat plantletsTriticum aestivumt0
- Treatment
- antagonists of calciume0
- Outcome
- plantlets' heat resistancee0
- Direction
- removede0
- Qualifier
- partiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These compounds and antagonists of calcium also partially removed the effect of the rise of plantlets' heat resistance, invoked by hardening heating.”
t0“wheat plantlets”
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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.