Abstract
Abstract To assess the effects of scion and rootstock genotypes on plant growth and the anti-oxidant defense systems of cucumber, two cucumber cultivars (“Jinchun No. 2”, a relatively salt-sensitive cultivar, and “Jinyu No. 1”, a relatively salt-tolerant cultivar) were grafted onto two rootstocks (“Figleaf Gourd”, a relatively salt-sensitive cultivar, and “Chaojiquanwang”, a relatively salt-tolerant cultivar), respectively. The grafted plants were grown hydroponically and were exposed to 0 and 100 mmol L−1 NaCl stress under greenhouse conditions. The results showed that the salt injury index, leaf Na+ content and root hydrogen peroxide (H2O2) content in the plants grafted onto Figleaf Gourd were higher, whereas the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in the leaves and roots were lower than those of the plants grafted onto Chaojiquanwang under NaCl stress, independent of the scion genotypes. This resulted in smaller reductions in root dry weight, shoot dry weight and leaf area in the plants grafted onto Chaojiquanwang. The salt injury index was positively correlated with the leaf Na+ content and H2O2 content in the leaves and roots, but was negatively correlated with the activities of SOD and POD in the roots. The effects of scion on the salt injury index, Na+ content in the leaves, H2O2 content and activities of POD and CAT in the roots were significant, whereas there were no significant effects of scion on the root and shoot dry weights, leaf area and leaf relative water content. Overall, these results suggest the following: (1) the salt-tolerant rootstock was more important in determining the salt tolerance of the grafted cucumber seedlings under NaCl stress compared with the scion genotypes, (2) the higher salt tolerance of the grafted cucumber seedlings could be partially attributed to the lower leaf Na+ content and root H2O2 content and higher activities of SOD, POD and CAT in the roots.
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Claims 10
Claim · model-written summary
Under NaCl stress, Figleaf Gourd rootstock had a higher salt injury index than Chaojiquanwang.
- Taxon
- cucumber seedlings
Cucumis sativust0 - Material
- Figleaf Gourde0
- Treatment
- NaCl stresse1
- Outcome
- salt injury indexe0
- Direction
- highere0
- Comparator
- Chaojiquanwange1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“salt injury index, leaf Na+ content and root hydrogen peroxide (H2O2) content in the plants grafted onto Figleaf Gourd were higher”
e1“than those of the plants grafted onto Chaojiquanwang under NaCl stress”
Claim · model-written summary
Figleaf Gourd rootstock had higher leaf Na+ and root H2O2 contents under NaCl stress.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- Figleaf Gourde0
- Treatment
- NaCl stresse1
- Outcome
- leaf Na+ content and root hydrogen peroxide (H2O2) contente0
- Direction
- highere0
- Comparator
- Chaojiquanwange1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“leaf Na+ content and root hydrogen peroxide (H2O2) content in the plants grafted onto Figleaf Gourd were higher”
e1“than those of the plants grafted onto Chaojiquanwang under NaCl stress”
Claim · model-written summary
Figleaf Gourd rootstock had lower leaf and root SOD, POD and CAT activities than Chaojiquanwang.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- Figleaf Gourde1
- Treatment
- NaCl stresse0
- Outcome
- activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in the leaves and rootse0
- Direction
- lowere0
- Comparator
- Chaojiquanwange0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in the leaves and roots were lower than those of the plants grafted onto Chaojiquanwang under NaCl stress”
e1“plants grafted onto Figleaf Gourd”
Claim · model-written summary
Chaojiquanwang rootstock had smaller reductions in root and shoot dry weight and leaf area.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- Chaojiquanwange0
- Outcome
- root dry weight, shoot dry weight and leaf areae0
- Direction
- smaller reductionse0
- Comparator
- Figleaf Gourde1
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“smaller reductions in root dry weight, shoot dry weight and leaf area in the plants grafted onto Chaojiquanwang”
e1“plants grafted onto Figleaf Gourd”
Claim · model-written summary
Salt injury index was positively correlated with leaf Na+ and leaf and root H2O2 contents.
- Taxon
- cucumber seedlingsCucumis sativust0
- Compound
- leaf Na+ content and H2O2 contente0
- Outcome
- salt injury indexe0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“salt injury index was positively correlated with the leaf Na+ content and H2O2 content in the leaves and roots”
Claim · model-written summary
Scion genotype significantly affected salt injury index and leaf Na+ content.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- scione0
- Outcome
- salt injury index, Na+ content in the leavese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“effects of scion on the salt injury index, Na+ content in the leaves, H2O2 content and activities of POD and CAT in the roots were significant”
Claim · model-written summary
Scion genotype significantly affected root H2O2 content and root POD and CAT activities.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- scione0
- Outcome
- H2O2 content and activities of POD and CAT in the rootse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“effects of scion on the salt injury index, Na+ content in the leaves, H2O2 content and activities of POD and CAT in the roots were significant”
Claim · model-written summary
Scion genotype had no significant effect on root and shoot dry weights and leaf area.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- scione0
- Outcome
- root and shoot dry weights, leaf areae0
- Direction
- no significant effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“no significant effects of scion on the root and shoot dry weights, leaf area and leaf relative water content”
Claim · model-written summary
Scion genotype had no significant effect on leaf relative water content.
- Taxon
- cucumber seedlingsCucumis sativust0
- Material
- scione0
- Outcome
- leaf relative water contente0
- Direction
- no significant effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“no significant effects of scion on the root and shoot dry weights, leaf area and leaf relative water content”
Claim · model-written summary
Authors attributed increased salt tolerance partly to lower leaf Na+ and root H2O2 and higher root SOD, POD and CAT activities.
- Taxon
- cucumber seedlingsCucumis sativust0
- Outcome
- higher salt tolerancee0
- Qualifier
- lower leaf Na+ content and root H2O2 content and higher activities of SOD, POD and CAT in the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cucumber seedlings”
e0“higher salt tolerance of the grafted cucumber seedlings could be partially attributed to the lower leaf Na+ content and root H2O2 content and higher activities of SOD, POD and CAT in the roots”
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