Abstract
We investigated the effects of exogenous sodium nitroprusside (SNP), a nitric oxide (NO) donor, on growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings and antioxidant enzyme activities in cucumber leaves under waterlogging stress. The growth of cucumber seedlings was significantly inhibited when plants were exposed to waterlogging, whereas shoot spraying with SNP significantly alleviated the inhibition of growth from this type of stress: height, fresh and dry weights of the flooded plants increased obviously. Waterlogging also caused the activation of the antioxidant enzymes (superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX)), the reduction of the chlorophyll content, and the accumulation of MDA and protein in leaves. It was found that SNP treatment further potentiated the antioxidant enzyme activities and maintained the chlorophyll and protein content during the entire water-logging period; however, it reduced the MDA content. Thus, NO protects plants from oxidative damage and promotes growth by activation of antioxidant enzymes in leaves in an extent sufficient for the alleviation of membrane injury. However, exogenous NO had no significant effects on cucumber seedlings growth and antioxidant enzyme activities under nonstress conditions.
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Claims 10
Claim · model-written summary
Waterlogging significantly inhibited cucumber seedling growth.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- waterlogginge0
- Outcome
- growth of cucumber seedlingse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of cucumber seedlings was significantly inhibited when plants were exposed to waterlogging”
Claim · model-written summary
SNP spraying alleviated waterlogging growth inhibition, increasing height and fresh and dry weights.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- shoot spraying with SNPe0
- Outcome
- height, fresh and dry weightse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot spraying with SNP significantly alleviated the inhibition of growth from this type of stress: height, fresh and dry weights of the flooded plants increased obviously”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
Waterlogging activated four antioxidant enzymes.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Waterlogginge0
- Outcome
- activation of the antioxidant enzymese0
- Direction
- activatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Waterlogging also caused the activation of the antioxidant enzymes (superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX))”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
Waterlogging reduced chlorophyll.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- chlorophyll contente0
- Direction
- reductione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction of the chlorophyll content”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
Waterlogging accumulated MDA and protein in leaves.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- MDA and protein in leavese0
- Direction
- accumulatione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the accumulation of MDA and protein in leaves”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
SNP further potentiated antioxidant enzyme activities.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- SNP treatmente0
- Outcome
- antioxidant enzyme activitiese0
- Direction
- potentiatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SNP treatment further potentiated the antioxidant enzyme activities”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
SNP maintained chlorophyll and protein during waterlogging.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- chlorophyll and protein contente0
- Direction
- maintainede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintained the chlorophyll and protein content during the entire water-logging period”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
SNP reduced MDA content.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- MDA contente0
- Direction
- reducede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it reduced the MDA content”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
NO may protect seedlings by activating leaf antioxidant enzymes.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- oxidative damagee0
- Qualifier
- activation of antioxidant enzymes in leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO protects plants from oxidative damage and promotes growth by activation of antioxidant enzymes in leaves”
e1“growth of cucumber ( Cucumis sativus L., cv. Jinyou No.1) seedlings”
Claim · model-written summary
Exogenous NO had no significant effect on growth or antioxidant enzyme activity without stress.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- exogenous NOe0
- Outcome
- cucumber seedlings growth and antioxidant enzyme activitiese0
- Direction
- no significant effectse0
- Qualifier
- under nonstress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous NO had no significant effects on cucumber seedlings growth and antioxidant enzyme activities under nonstress conditions”
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