Abstract
【Objective】The purpose of this study is to reveal the soil microbiology mechanism of grafting on increase of plant disease resistance,and the differences of rhizosphere soil microorganism population and community structure of grafted and ungrafted watermelon cultivars with different resistances to Fusarium oxysporum f.sp.niveum were evaluated.【Method】Changes of rhizosphere soil microorganism population and community of own-rooted watermelon cultivars(Tianniu,resistant cultivar;and Tianshi,susceptible cultivar),rootstock(Boqiang No.1,pumpkin) and their grafted plants were investigated by plate culture method and PCR-DGGE method at different watermelon growth stages.【Result】Plate culture results showed that the rhizosphere culturable bacteria population of resistant watermelon cultivar was significantly larger than that of the susceptible cultivar,while the fungi population was significantly smaller than that of the susceptible cultivar of the watermelon at middle-late growing stage.The rhizosphere culturable bacteria and actinomyces populations of the grafted susceptible cultivar were larger than the ungrafted one,but the Fusarium population in rhizosphere soil of grafted watermelon was smaller than that of the ungrafted.PCR-DGGE results showed that rhizosphere soil bacteria and fungi community structures of all treatments changed with watermelon growth stages,and were different between different treatments.Further sequencing analysis of specific bands from DGGE profiles indicated that different groups of bacteria and fungi occurred in the rhizosphere of different watermelon cultivars and rootstock Pupkin cultivar.【Conclusion】The resistant watermelon cultivar had significant higher quantities of rhizosphere soil bacteria and actinomyces compared with the susceptible one,while the resistant watermelon cultivar had significant lower quantities of rhizosphere soil fungi and Fusarium compared with the susceptible one.The resistance of watermelon cultivar was closely related to the size of rhizosphere microorganism population.The grafting treatment significantly improved rhizosphere soil bacteria and actinomyces quantities and reduced the quantities of rhizosphere soil Fusarium of susceptible cultivar.The grafting treatment also changed soil microbial community structures.It was concluded that plant genotype has a significant impact on soil microbial community structure,and the differences in the rhizosphere microbial community may contribute to the differences in resistance to F.oxysporum f.sp.Niveum and cultivars.
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Claims 9
Claim · model-written summary
Rhizosphere culturable bacteria were more abundant in the resistant watermelon cultivar than in the susceptible one.
- Taxon
- watermelon
Citrullus lanatuse0 - Outcome
- rhizosphere culturable bacteria populatione0
- Direction
- largere0
- Comparator
- susceptible cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rhizosphere culturable bacteria population of resistant watermelon cultivar was significantly larger than that of the susceptible cultivar”
Claim · model-written summary
Rhizosphere fungi were less abundant in the resistant watermelon cultivar than in the susceptible one.
- Taxon
- watermelonCitrullus lanatuse0
- Outcome
- fungi populatione1
- Direction
- smallere1
- Comparator
- susceptible cultivare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rhizosphere culturable bacteria population of resistant watermelon cultivar was significantly larger than that of the susceptible cultivar”
e1“while the fungi population was significantly smaller than that of the susceptible cultivar”
Claim · model-written summary
Grafting increased rhizosphere culturable bacteria and actinomyces populations of the susceptible watermelon cultivar relative to ungrafted plants.
- Taxon
- watermelonCitrullus lanatuse3
- Treatment
- graftede2
- Outcome
- rhizosphere culturable bacteria and actinomyces populationse2
- Direction
- largere2
- Comparator
- ungraftede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The rhizosphere culturable bacteria and actinomyces populations of the grafted susceptible cultivar were larger than the ungrafted one”
e3“but the Fusarium population in rhizosphere soil of grafted watermelon was smaller than that of the ungrafted”
Claim · model-written summary
Grafting reduced the Fusarium population in rhizosphere soil of watermelon relative to ungrafted plants.
- Taxon
- watermelonCitrullus lanatuse3
- Treatment
- graftede3
- Outcome
- Fusarium populatione3
- Direction
- smallere3
- Comparator
- ungraftede3
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“but the Fusarium population in rhizosphere soil of grafted watermelon was smaller than that of the ungrafted”
Claim · model-written summary
Rhizosphere soil bacteria and fungi community structures changed with watermelon growth stages and differed between treatments.
- Taxon
- watermelonCitrullus lanatuse4
- Outcome
- rhizosphere soil bacteria and fungi community structurese4
- Qualifier
- changed with watermelon growth stages, and were different between different treatmentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“rhizosphere soil bacteria and fungi community structures of all treatments changed with watermelon growth stages, and were different between different treatments”
Claim · model-written summary
Different groups of bacteria and fungi occurred in the rhizosphere of different watermelon cultivars.
- Taxon
- watermelonCitrullus lanatuse5
- Outcome
- different groups of bacteria and fungie5
- Setting
- rhizospheree5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“different groups of bacteria and fungi occurred in the rhizosphere of different watermelon cultivars”
Claim · model-written summary
The resistance of the watermelon cultivar was closely related to the size of the rhizosphere microorganism population.
- Taxon
- watermelonCitrullus lanatuse0
- Interactor
- rhizosphere microorganism populatione6other
- Outcome
- resistancee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rhizosphere culturable bacteria population of resistant watermelon cultivar was significantly larger than that of the susceptible cultivar”
e6“The resistance of watermelon cultivar was closely related to the size of rhizosphere microorganism population”
Claim · model-written summary
Plant genotype has a significant impact on soil microbial community structure in watermelon.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- plant genotypee7
- Outcome
- soil microbial community structuree7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rhizosphere culturable bacteria population of resistant watermelon cultivar was significantly larger than that of the susceptible cultivar”
e7“It was concluded that plant genotype has a significant impact on soil microbial community structure,and the differences in the rhizosphere microbial community may contribute to the differences in resistance to F.oxysporum f.sp.Niveum and cultivars”
Claim · model-written summary
Differences in the rhizosphere microbial community may contribute to the differences in resistance to F. oxysporum f.sp. niveum among watermelon cultivars.
- Taxon
- watermelonCitrullus lanatuse0
- Outcome
- differences in resistance to F.oxysporum f.sp.Niveum and cultivarse7
- Qualifier
- the differences in the rhizosphere microbial communitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rhizosphere culturable bacteria population of resistant watermelon cultivar was significantly larger than that of the susceptible cultivar”
e7“It was concluded that plant genotype has a significant impact on soil microbial community structure,and the differences in the rhizosphere microbial community may contribute to the differences in resistance to F.oxysporum f.sp.Niveum and cultivars”
The same questions in other papers
grafting · Fusarium · Citrullus lanatus (watermelon)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.