Abstract
The effect of silicon (Si) on salinity-induced oxidative damages of cucumber was investigated in a greenhouse experiment. Two cucumber cultivars (Cucumis sativus L. cvs. Negin and Super Dominus) were exposed to two salinity levels (0 and 50 mM NaCl) and two Si levels (0 and 1 µM). Silicon stimulated shoot growth of cucumber particularly under saline conditions. Leaf malondialdehyde (MDA) content was increased in ‘Super Dominus’ while it remained unchanged in ‘Negin’ by salt stress. MDA content in cucumber leaves was reduced by Si. The effect of salinity on activity of catalase (CAT) and ascorbate peroxidase (APX) was dependent on enzyme type and cultivar. Silicon increased activity of CAT, APX, and guaiacol peroxidase (GPX) in the leaves. Silicon nutrition could alleviate salt-oxidative stress on cucumber plants by increasing activity of antioxidant enzymes. Higher activity of CAT, APX, and GPX in ‘Negin’ might be associated with its greater tolerance to salinity.
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Claims 8
Claim · model-written summary
Silicon stimulated cucumber shoot growth, especially under saline conditions.
- Taxon
- cucumber
Cucumis sativuse0 - Organ / stage
- shoote0
- Treatment
- Silicone0
- Outcome
- shoot growthe0
- Direction
- stimulatede0
- Qualifier
- particularly under saline conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silicon stimulated shoot growth of cucumber particularly under saline conditions.”
Claim · model-written summary
Salt stress increased leaf malondialdehyde in Super Dominus.
- Taxon
- cucumberCucumis sativuse1
- Material
- Super Dominuse0
- Treatment
- salt stresse0
- Outcome
- Leaf malondialdehyde (MDA) contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf malondialdehyde (MDA) content was increased in ‘Super Dominus’ while it remained unchanged in ‘Negin’ by salt stress.”
e1“salinity-induced oxidative damages of cucumber”
Claim · model-written summary
Salt stress left leaf malondialdehyde unchanged in Negin.
- Taxon
- cucumberCucumis sativuse1
- Material
- Negine0
- Treatment
- salt stresse0
- Outcome
- Leaf malondialdehyde (MDA) contente0
- Direction
- remained unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf malondialdehyde (MDA) content was increased in ‘Super Dominus’ while it remained unchanged in ‘Negin’ by salt stress.”
e1“salinity-induced oxidative damages of cucumber”
Claim · model-written summary
Silicon reduced malondialdehyde content in cucumber leaves.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Sie0
- Outcome
- MDA contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA content in cucumber leaves was reduced by Si.”
Claim · model-written summary
Salinity effects on catalase and ascorbate peroxidase activity depended on enzyme and cultivar.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- salinitye0
- Outcome
- activity of catalase (CAT) and ascorbate peroxidase (APX)e0
- Qualifier
- dependent on enzyme type and cultivare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of salinity on activity of catalase (CAT) and ascorbate peroxidase (APX) was dependent on enzyme type and cultivar.”
e1“salinity-induced oxidative damages of cucumber”
Claim · model-written summary
Silicon increased catalase, ascorbate peroxidase, and guaiacol peroxidase activity in cucumber leaves.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Silicone0
- Outcome
- activity of CAT, APX, and guaiacol peroxidase (GPX)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silicon increased activity of CAT, APX, and guaiacol peroxidase (GPX) in the leaves.”
e1“salinity-induced oxidative damages of cucumber”
Claim · model-written summary
The authors conclude that silicon may alleviate salt oxidative stress by increasing antioxidant enzyme activity.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Silicon nutritione0
- Outcome
- salt-oxidative stresse0
- Direction
- alleviatee0
- Qualifier
- by increasing activity of antioxidant enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silicon nutrition could alleviate salt-oxidative stress on cucumber plants by increasing activity of antioxidant enzymes.”
Claim · model-written summary
Higher CAT, APX, and GPX activity in Negin may be associated with greater salinity tolerance.
- Taxon
- cucumberCucumis sativuse1
- Material
- Negine0
- Outcome
- greater tolerance to salinitye0
- Direction
- greatere0
- Qualifier
- Higher activity of CAT, APX, and GPXe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher activity of CAT, APX, and GPX in ‘Negin’ might be associated with its greater tolerance to salinity.”
e1“salinity-induced oxidative damages of cucumber”
The same questions in other papers
silicon atom · physiology: antioxidant enzymes · Cucumis sativus (cucumber)Results differ
15 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- positive
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See all 18 papers →silicon atom · growth · Cucumis sativus (cucumber)Results differ
24 papers in the same direction as this paper · 2 in the opposite direction
- no effect
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See all 27 papers →silicon atom · physiology: oxidative · Cucumis sativus (cucumber)Positive and negative results
15 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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See all 17 papers →salinity · physiology: oxidative · Cucumis sativus (cucumber)Positive and negative results
26 in the opposite direction
- negative
- negative
- negative
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See all 27 papers →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.