Abstract
Abstract: Nitric oxide (NO) is a active molecule involved in mediation of various biotic and abiotic stressinduced physiological responses in plants. In the present study, using SNP (sodium nitroprusside) as NO donor and cPTIO [2-(4-carboxypheny-4,4,5,5-tetramethylimidazoline-1-1oxyl-3-oxide, potassium salt] as specific NO scavenger, we examined the ability of exogenous NO to alleviate oxidative damage, accelerate proline accumulation and enhance photosynthesis in leaves of wheat seedlings subjected to osmotic stress. Wheat seedlings were exposed to Hoagland solution containing 15 % polyethylene glycol (PEG), or 15 % PEG plus 1 1 1 0.3mmol L SNP or 15 % PEG plus 0.3 mmol L SNP and 0.5 mmol L cPTIO for 24 h. The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves, which in turn caused exacerbation of lipid peroxidation and depression of photosynthesis. Application of NO donor SNP retarded decrease in SOD and CAT activity, increase in O-2 production and hence inhibited lipid peroxidation. As a result, F m/F o, F v/F m, |ÕPS2 and Pn in leaves of wheat seedlings subjected to osmotic stress were increased. Meanwhile, proline accumulation was accelerated and higher relative water content (RWC), w and lower leaf water loss (LWL) were maintained by the application of SNP under osmotic stress. However, such effects of SNP were reversed by the addition of NO scavenger cPTIO. It was indicated that effects of NO on preventing wheat leaves from osmotic stress-induced damage might be specific.
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Claims 13
Claim · model-written summary
Osmotic stress decreased superoxide dismutase and catalase activity in wheat leaves.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- osmotic stresse1
- Outcome
- superoxide dismutase (SOD) and catalase (CAT) activitye1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
Claim · model-written summary
Osmotic stress increased superoxide (O2-) production in wheat leaves.
- Taxon
- wheatTriticum aestivume1
- Treatment
- osmotic stresse1
- Outcome
- overproduction of O 2e1
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
Claim · model-written summary
Osmotic stress caused exacerbation of lipid peroxidation in wheat leaves.
- Taxon
- wheatTriticum aestivume1
- Treatment
- osmotic stresse1
- Outcome
- lipid peroxidatione3
- Direction
- increaseinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e3“which in turn caused exacerbation of lipid peroxidation and depression of photosynthesis”
Claim · model-written summary
Osmotic stress depressed photosynthesis in wheat leaves.
- Taxon
- wheatTriticum aestivume1
- Treatment
- osmotic stresse1
- Outcome
- photosynthesise3
- Direction
- decreaseinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e3“which in turn caused exacerbation of lipid peroxidation and depression of photosynthesis”
Claim · model-written summary
SNP retarded the osmotic-stress decrease in SOD and CAT activity in wheat leaves.
- Taxon
- wheatTriticum aestivume1
- Treatment
- NO donor SNPe5
- Outcome
- SOD and CAT activitye5
- Direction
- increasee5
- Comparator
- osmotic stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e5“Application of NO donor SNP retarded decrease in SOD and CAT activity, increase in O-2 production and hence inhibited lipid peroxidation”
Claim · model-written summary
SNP reduced O-2 production in osmotically stressed wheat leaves.
- Taxon
- wheatTriticum aestivume1
- Treatment
- NO donor SNPe5
- Outcome
- O-2 productione5
- Direction
- decreaseinferrede5
- Comparator
- osmotic stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e5“Application of NO donor SNP retarded decrease in SOD and CAT activity, increase in O-2 production and hence inhibited lipid peroxidation”
Claim · model-written summary
SNP inhibited lipid peroxidation in osmotically stressed wheat leaves.
- Taxon
- wheatTriticum aestivume1
- Treatment
- NO donor SNPe5
- Outcome
- lipid peroxidatione5
- Direction
- inhibitede5
- Comparator
- osmotic stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e5“Application of NO donor SNP retarded decrease in SOD and CAT activity, increase in O-2 production and hence inhibited lipid peroxidation”
Claim · model-written summary
SNP increased Fm/Fo, Fv/Fm and the PS2 parameter in osmotically stressed wheat leaves.
- Taxon
- wheatTriticum aestivume7
- Treatment
- NO donor SNPe5
- Outcome
- F m/F o, F v/F m, |ÕPS2e7
- Direction
- increasede7
- Comparator
- osmotic stresse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Application of NO donor SNP retarded decrease in SOD and CAT activity, increase in O-2 production and hence inhibited lipid peroxidation”
e7“As a result, F m/F o, F v/F m, |ÕPS2 and Pn in leaves of wheat seedlings subjected to osmotic stress were increased”
Claim · model-written summary
SNP increased net photosynthesis (Pn) in osmotically stressed wheat leaves.
- Taxon
- wheatTriticum aestivume7
- Treatment
- NO donor SNPe5
- Outcome
- Pne7
- Direction
- increasede7
- Comparator
- osmotic stresse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Application of NO donor SNP retarded decrease in SOD and CAT activity, increase in O-2 production and hence inhibited lipid peroxidation”
e7“As a result, F m/F o, F v/F m, |ÕPS2 and Pn in leaves of wheat seedlings subjected to osmotic stress were increased”
Claim · model-written summary
SNP accelerated proline accumulation in osmotically stressed wheat seedlings.
- Taxon
- wheatTriticum aestivume1
- Treatment
- application of SNPe6
- Outcome
- proline accumulatione6
- Direction
- acceleratede6
- Comparator
- osmotic stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e6“Meanwhile, proline accumulation was accelerated and higher relative water content (RWC), w and lower leaf water loss (LWL) were maintained by the application of SNP under osmotic stress”
Claim · model-written summary
SNP maintained higher relative water content in osmotically stressed wheat seedlings.
- Taxon
- wheatTriticum aestivume1
- Treatment
- application of SNPe6
- Outcome
- relative water content (RWC)e6
- Direction
- highere6
- Comparator
- osmotic stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e6“Meanwhile, proline accumulation was accelerated and higher relative water content (RWC), w and lower leaf water loss (LWL) were maintained by the application of SNP under osmotic stress”
Claim · model-written summary
SNP maintained lower leaf water loss in osmotically stressed wheat seedlings.
- Taxon
- wheatTriticum aestivume1
- Treatment
- application of SNPe6
- Outcome
- leaf water loss (LWL)e6
- Direction
- lowere6
- Comparator
- osmotic stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e6“Meanwhile, proline accumulation was accelerated and higher relative water content (RWC), w and lower leaf water loss (LWL) were maintained by the application of SNP under osmotic stress”
Claim · model-written summary
The cPTIO scavenger reversed the protective effects of SNP in wheat.
- Taxon
- wheatTriticum aestivume1
- Treatment
- addition of NO scavenger cPTIOe6
- Outcome
- effects of SNPe6
- Direction
- reversede6
- Comparator
- SNPe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that osmotic stress induced decrease in superoxide dismutase (SOD) and catalase (CAT) activity and overproduction of O 2 in wheat leaves”
e6“However, such effects of SNP were reversed by the addition of NO scavenger cPTIO”
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See all 5 papers →8 of 14 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.