Abstract
The effect of spermidine on induced resistance to powdery mildew in Cucumis sativus L.cv.'Changchun mici' seedlings was conducted,and the activities of 4 defense enzymes and expression of 3 defense gene were tested in cucumber leaves after treated with spermidine and inoculated with powdery mildew.The results showed that:(1)0.2～1.0 mmol·L-1 spermidine expressed different induced effects on cucumber seedlings powdery mildew resistance,and 0.8 mmol·L-1 spermidine had the best effects on cucumber seedlings and the induced efficiency reached to 55.3%.(2)The defense enzymes of cucumber seedlings such as peroxidase(POD),phenylalanine amonnialyase(PAL),chitinase and β-1,3-glucanase activities increased after spermidine inducement or powdery mildew inoculation.The increase of these enzymes activity treated with both spermidine inducement and powdery mildew inoculation were faster than those only treated with inducement.The expression of POX,PAL,PR-1a gene enhanced after spermidine inducement or powdery mildew inoculation.In summary,the results indicate that spermidine enhance the expression of defense genes,increase the activities of defense enzymes,decrease disease index significantly,then increase cucumber resistance to powdery mildew.
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Claims 5
Claim · model-written summary
Spermidine induced cucumber seedling resistance to powdery mildew, with 0.8 mmol·L-1 producing 55.3% efficiency.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- 0.8 mmol·L-1 spermidinee0
- Outcome
- induced efficiencye0
- Direction
- best effectse0
- Value
- 55.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.8 mmol·L-1 spermidine had the best effects on cucumber seedlings and the induced efficiency reached to 55.3%”
Claim · model-written summary
Spermidine or powdery mildew inoculation increased four cucumber defense enzyme activities.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- spermidine inducement or powdery mildew inoculatione0
- Outcome
- peroxidase(POD),phenylalanine amonnialyase(PAL),chitinase and β-1,3-glucanase activitiese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The defense enzymes of cucumber seedlings such as peroxidase(POD),phenylalanine amonnialyase(PAL),chitinase and β-1,3-glucanase activities increased after spermidine inducement or powdery mildew inoculation”
Claim · model-written summary
Combined spermidine induction and powdery mildew inoculation accelerated cucumber defense enzyme activity compared with induction alone.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- both spermidine inducement and powdery mildew inoculatione0
- Outcome
- these enzymes activitye0
- Direction
- fastere0
- Comparator
- those only treated with inducemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The defense enzymes of cucumber seedlings such as peroxidase(POD),phenylalanine amonnialyase(PAL),chitinase and β-1,3-glucanase activities increased after spermidine inducement or powdery mildew inoculation.The increase of these enzymes activity treated with both spermidine inducement and powdery mildew inoculation were faster than those only treated with inducement”
Claim · model-written summary
Spermidine induction or powdery mildew inoculation enhanced POX, PAL and PR-1a expression.
- Treatment
- spermidine inducement or powdery mildew inoculatione0
- Gene
- POX,PAL,PR-1a genee0
- Outcome
- expressione0
- Direction
- enhancede0
Not reportedTaxonComparator
Verbatim
e0“The expression of POX,PAL,PR-1a gene enhanced after spermidine inducement or powdery mildew inoculation”
Claim · model-written summary
The authors report that spermidine significantly decreased the cucumber disease index.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- spermidinee0
- Outcome
- disease indexe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spermidine enhance the expression of defense genes,increase the activities of defense enzymes,decrease disease index significantly,then increase cucumber resistance to powdery mildew”
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