Abstract
Nitric oxide (NO), as a biologically active molecule, widely involved in the biotic and abiotic stresses. By using solution culture, this paper reported the dynamic changes in enzyme activity and metabolites related to GSH-PCs synthesis way mediated by exogenous NO in tomato (Lycopersicon esculentum). The results showed that exogenous NO could affect the metabolic pathway of GSH-PCs in tomato seedlings under copper stress. Compared with CK, the activity of γ-ECS and GS was significantly activated, consequently resulting in a sharp rise in GSH and PCs contents in tomato root. Moreover, γ-ECS and GS activity, GSH and PCs contents constantly rise with the extension of processing time under copper stress. Adding exogenous SNP could further improve γ-ECS and GS activity in tomato, and promote the production of GSH and PCs, which contributed to enhancing the ability of removing superoxide and chelating excess Cu2+ to reduce its biological toxicity. To a certain extent, GSH-PCs metabolic changes in leaf lagged behind that in roots. Exogenous BSO could significantly inhibit γ-ECS activity, and applying SNP could significantly reverse the inhibition on GSH and PCs synthesis by BSO. BSO had little effects on PCs content in leaf. Under copper stress, exogenous NO may initiate a signal mechanism and reduce the biotoxicity and oxidative damage caused by excessive Cu2+ by activating or enhancing the enzymatic and non-enzymatic systems in the GSH-PCs synthesis path.
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Claims 13
Claim · model-written summary
Exogenous NO affected the GSH-PCs pathway under copper stress.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- exogenous NOe0
- Outcome
- metabolic pathway of GSH-PCse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous NO could affect the metabolic pathway of GSH-PCs in tomato seedlings under copper stress”
Claim · model-written summary
γ-ECS and GS activity was significantly activated relative to CK.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- γ-ECS and GSe0
- Outcome
- activity of γ-ECS and GSe0
- Direction
- activatede0
- Comparator
- CKe0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK, the activity of γ-ECS and GS was significantly activated”
t0“tomato”
Claim · model-written summary
GSH and PCs contents rose sharply in tomato roots.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- roote0
- Outcome
- GSH and PCs contentse0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a sharp rise in GSH and PCs contents in tomato root”
Claim · model-written summary
γ-ECS and GS activity rose with time under copper stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- copper stresse0
- Outcome
- γ-ECS and GS activitye0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“γ-ECS and GS activity, GSH and PCs contents constantly rise with the extension of processing time under copper stress”
t0“tomato”
Claim · model-written summary
GSH and PCs contents rose with time under copper stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- copper stresse0
- Outcome
- GSH and PCs contentse0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GSH and PCs contents constantly rise with the extension of processing time under copper stress”
t0“tomato”
Claim · model-written summary
SNP further improved γ-ECS and GS activity.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous SNPe0
- Outcome
- γ-ECS and GS activitye0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding exogenous SNP could further improve γ-ECS and GS activity in tomato”
Claim · model-written summary
SNP promoted GSH and PCs production.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous SNPe0
- Outcome
- production of GSH and PCse0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding exogenous SNP could further improve γ-ECS and GS activity in tomato, and promote the production of GSH and PCs”
Claim · model-written summary
The induced changes contributed to superoxide removal and Cu2+ chelation.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- ability of removing superoxide and chelating excess Cu2+e0
- Qualifier
- reduce its biological toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which contributed to enhancing the ability of removing superoxide and chelating excess Cu2+ to reduce its biological toxicity”
t0“tomato”
Claim · model-written summary
Leaf GSH-PCs metabolic changes lagged behind roots.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- leafe0
- Outcome
- GSH-PCs metabolic changese0
- Direction
- lagged behinde0
- Comparator
- rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GSH-PCs metabolic changes in leaf lagged behind that in roots”
t0“tomato”
Claim · model-written summary
BSO significantly inhibited γ-ECS activity.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Exogenous BSOe0
- Outcome
- γ-ECS activitye0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous BSO could significantly inhibit γ-ECS activity”
t0“tomato”
Claim · model-written summary
SNP significantly reversed BSO inhibition of GSH and PCs synthesis.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- applying SNPe0
- Outcome
- GSH and PCs synthesise0
- Direction
- reversee0
- Comparator
- BSOe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying SNP could significantly reverse the inhibition on GSH and PCs synthesis by BSO”
t0“tomato”
Claim · model-written summary
BSO had little effect on leaf PCs content.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- leafe0
- Treatment
- BSOe0
- Outcome
- PCs contente0
- Direction
- little effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BSO had little effects on PCs content in leaf”
t0“tomato”
Claim · model-written summary
NO may reduce Cu2+ biotoxicity and oxidative damage through GSH-PCs systems.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- exogenous NOe0
- Outcome
- biotoxicity and oxidative damagee0
- Qualifier
- activating or enhancing the enzymatic and non-enzymatic systems in the GSH-PCs synthesis pathe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous NO may initiate a signal mechanism and reduce the biotoxicity and oxidative damage caused by excessive Cu2+ by activating or enhancing the enzymatic and non-enzymatic systems in the GSH-PCs synthesis path”
t0“tomato”
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