Abstract
The effect of NO on oxidative damage caused by shade was investigated in tall fescue(Festuca arundinacea 'Arid 3') leaves.Tall fescue seedlings sprayed with NO donor(sodium nitroprusside,SNP)were subjected to 0%,20%,60%,90%shade stress.Treatment of tall fescue leaves with 0.1 mM SNP before shade stress alleviated shade-induced membrane permeability,malondialdehyde contents.However,the activities of peroxidase(POD),superoxide dismutase(SOD) and catalase(CAT),as well as chlorophyll(Chl) content and proline accumulation in tall fescue leaves increased in the presence of SNP under shade stress.Moreover,the protective effect of NO varied according to shade time and intensity.Exogenous NO showed better protective effects under 20%and 60%shade,but a less influence under 90%shade.On the other hand,there was a significant difference between different exposure times.Treatments with SNP under 20%,60%and 90%shade for two weeks showed the best effect.It could be concluded that NO might act as a signaling molecule to enhance antioxidant enzyme activities,thereby protecting tall fescue leaves from oxidative injures under shade stress.However,the protective effect of NO declined with the increases of treatment time and intensity.
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Claims 6
Claim · model-written summary
SNP alleviated shade-induced membrane permeability and malondialdehyde content.
- Taxon
- tall fescue
Lolium arundinaceume0 - Treatment
- 0.1 mM SNPe0
- Outcome
- membrane permeability,malondialdehyde contentse0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of tall fescue leaves with 0.1 mM SNP before shade stress alleviated shade-induced membrane permeability,malondialdehyde contents.”
Claim · model-written summary
SNP increased antioxidant enzyme activities under shade.
- Taxon
- tall fescueLolium arundinaceume0
- Treatment
- SNPe0
- Outcome
- activities of peroxidase(POD),superoxide dismutase(SOD) and catalase(CAT)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of peroxidase(POD),superoxide dismutase(SOD) and catalase(CAT),as well as chlorophyll(Chl) content and proline accumulation in tall fescue leaves increased in the presence of SNP under shade stress.”
Claim · model-written summary
SNP increased chlorophyll content and proline accumulation under shade.
- Taxon
- tall fescueLolium arundinaceume0
- Treatment
- SNPe0
- Outcome
- chlorophyll(Chl) content and proline accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll(Chl) content and proline accumulation in tall fescue leaves increased in the presence of SNP under shade stress.”
Claim · model-written summary
NO protection was better under 20% and 60% shade.
- Taxon
- tall fescueLolium arundinaceumt0
- Outcome
- protective effectse0
- Direction
- bettere0
- Comparator
- 90%shadee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous NO showed better protective effects under 20%and 60%shade,but a less influence under 90%shade.”
t0“Tall Fescue”
Claim · model-written summary
Two weeks of SNP under shade showed the best effect.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- SNP under 20%,60%and 90%shade for two weekse0
- Outcome
- best effecte0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with SNP under 20%,60%and 90%shade for two weeks showed the best effect.”
t0“Tall Fescue”
Claim · model-written summary
NO protection declined with greater duration and intensity.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- treatment time and intensitye0
- Outcome
- protective effect of NOe0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the protective effect of NO declined with the increases of treatment time and intensity.”
t0“Tall Fescue”
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