Abstract
By the method of hydroponic culture, and taking Cucurbita ficifolia B. as rootstock, this paper studied the effects of grafting on the root polyamine metabolism of cucumber seedlings under copper stress. The results showed that under copper stress, the root activities of cucumber seedlings were inhibited, and electrolyte leakage increased, with these changes being significantly lower for grafted than for ungrafted cucumber seedlings. In addition, the contents of free spermidine and spermine, and of conjugated and bound polyamines were significantly higher in grafted than in ungrafted seedling roots, while the free putrescine content and the ratio of free putrescine to polyamines were on the contrary. Comparing with those in ungrafted cucumber seedlings, the root arginine decarboxylase (ADC), ornithine decarboxylase (ODC), and S-adenosylmethionine decarboxylase (SAMDC) activities in grafted cucumber seedlings were higher, while the diamine oxidase and polyamine oxidase activities were significantly lower. All of these indicated that under copper stress, the synthesis of polyamine in grafted seedling roots was increased, while the degradation of polyamine was decreased, resulting in a higher accumulation of polyamine in the roots, and the increase of the tolerance of cucumber seedlings to copper stress.
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Claims 10
Claim · model-written summary
Under copper stress, grafted cucumber seedlings had less inhibition of root activity than ungrafted seedlings.
- Taxon
- cucumber seedlings
Cucumis sativuse0 - Treatment
- graftede0
- Outcome
- root activitiese0
- Direction
- lowere0
- Qualifier
- under copper stresse0
- Comparator
- ungraftede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under copper stress, the root activities of cucumber seedlings were inhibited, and electrolyte leakage increased, with these changes being significantly lower for grafted than for ungrafted cucumber seedlings”
Claim · model-written summary
Under copper stress, grafted cucumber seedlings had less electrolyte leakage than ungrafted seedlings.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Treatment
- graftede0
- Outcome
- electrolyte leakagee0
- Direction
- lowere0
- Qualifier
- under copper stresse0
- Comparator
- ungraftede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under copper stress, the root activities of cucumber seedlings were inhibited, and electrolyte leakage increased, with these changes being significantly lower for grafted than for ungrafted cucumber seedlings”
Claim · model-written summary
Grafted seedlings had higher free spermidine and spermine contents in roots than ungrafted seedlings.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- seedling rootse0
- Treatment
- graftede0
- Outcome
- contents of free spermidine and sperminee0
- Direction
- highere0
- Comparator
- ungraftede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the contents of free spermidine and spermine, and of conjugated and bound polyamines were significantly higher in grafted than in ungrafted seedling roots”
t0“cucumber seedlings”
Claim · model-written summary
Grafted seedlings had higher conjugated and bound polyamine contents in roots than ungrafted seedlings.
- Taxon
- cucumberCucumis sativust0
- Treatment
- graftede0
- Outcome
- conjugated and bound polyaminese0
- Direction
- highere0
- Comparator
- ungraftede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the contents of free spermidine and spermine, and of conjugated and bound polyamines were significantly higher in grafted than in ungrafted seedling roots”
t0“cucumber seedlings”
Claim · model-written summary
Grafted seedlings had lower free putrescine content and a lower free putrescine to polyamine ratio than ungrafted seedlings.
- Taxon
- cucumberCucumis sativust0
- Outcome
- free putrescine content and the ratio of free putrescine to polyaminese0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the free putrescine content and the ratio of free putrescine to polyamines were on the contrary”
t0“cucumber seedlings”
Claim · model-written summary
ADC, ODC and SAMDC activities were higher in grafted than ungrafted cucumber roots.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Treatment
- graftede0
- Outcome
- arginine decarboxylase (ADC), ornithine decarboxylase (ODC), and S-adenosylmethionine decarboxylase (SAMDC) activitiese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root arginine decarboxylase (ADC), ornithine decarboxylase (ODC), and S-adenosylmethionine decarboxylase (SAMDC) activities in grafted cucumber seedlings were higher”
Claim · model-written summary
Diamine oxidase and polyamine oxidase activities were lower in grafted cucumber roots.
- Taxon
- cucumberCucumis sativust0
- Outcome
- diamine oxidase and polyamine oxidase activitiese0
- Direction
- lowere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the diamine oxidase and polyamine oxidase activities were significantly lower”
t0“cucumber seedlings”
Claim · model-written summary
Grafting increased polyamine synthesis in cucumber roots under copper stress.
- Taxon
- cucumberCucumis sativust0
- Treatment
- graftede0
- Outcome
- synthesis of polyaminee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under copper stress, the synthesis of polyamine in grafted seedling roots was increased”
t0“cucumber seedlings”
Claim · model-written summary
Grafting decreased polyamine degradation in cucumber roots under copper stress.
- Taxon
- cucumberCucumis sativust0
- Outcome
- degradation of polyaminee0
- Direction
- decreasede0
- Qualifier
- degradation of polyaminee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the degradation of polyamine was decreased”
t0“cucumber seedlings”
Claim · model-written summary
Grafting increased polyamine accumulation and copper tolerance in cucumber seedlings.
- Taxon
- cucumber seedlingsCucumis sativuse0
- Outcome
- tolerance of cucumber seedlings to copper stresse0
- Qualifier
- higher accumulation of polyamine in the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in a higher accumulation of polyamine in the roots, and the increase of the tolerance of cucumber seedlings to copper stress”
The same questions in other papers
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See all 23 papers →grafting · physiology: oxidative · Cucumis sativus (cucumber)Results agree
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See all 15 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.