Abstract
Antagonistic rhizobacteria, more specifically fluorescent pseudomonads and certain species of Bacillus, are known as biocontrol agents of fungal root diseases of agronomic crops. In this study, 144 bacteria were isolated from cucumber rhizosphere and screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition. Non-volatile compounds of 23 isolates showed noticeable inhibition zone (> 30%) against P. drechsleri, whereas volatile compounds of 7 isolates could prevent more than 30% of the mycelial growth of the fungus. All promising isolates, except of Pseudomonas flourescens V69, promoted significantly plant growth under in vitro condition. P. flourescens CV69 and V11 exhibited the highest colonization on the root. Results of the greenhouse studies showed that a reduction in disease incidence by use of some strains, and particularly use of strains CV6 and V11 as a soil treatment, exhibited a reduction in disease incidence so that suppressed disease by 85.71 and 69.39% respectively. Pseudomonas flourescens CV6 significantly suppressed disease in comparison to Ridomil fungicide. The use of mixture bacterial strains in the soil inoculated by the fungus resulting in falling down the most of the plants which didn't show significant difference with infected control soils without bacteria.
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Claims 8
Claim · model-written summary
Non-volatile compounds of 23 rhizobacterial isolates inhibited Phytophthora drechsleri with zones above 30 percent in vitro
- Taxon
- cucumber
Cucumis sativuse1 - Treatment
- Non-volatile compounds of 23 isolatese2
- Interactor
- Phytophthora drechsleriPhytophthora drechslerie1pathogen
- Second interactor
- rhizobacteriaHyphomicrobialese0biocontrol_agent
- Outcome
- inhibition zonee2
- Direction
- decreaseinferrede2
- Setting
- in vitro conditione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e2“Non-volatile compounds of 23 isolates showed noticeable inhibition zone (> 30%) against P. drechsleri”
e0“Antagonistic rhizobacteria”
Claim · model-written summary
Volatile compounds of 7 rhizobacterial isolates prevented more than 30 percent of Phytophthora drechsleri mycelial growth
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Volatile compounds of 7 isolatese3
- Interactor
- Phytophthora drechsleriPhytophthora drechslerie1pathogen
- Outcome
- mycelial growthe3
- Direction
- decreaseinferrede3
- Value
- more than 30%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e3“volatile compounds of 7 isolates could prevent more than 30% of the mycelial growth of the fungus”
Claim · model-written summary
All promising isolates except Pseudomonas flourescens V69 significantly promoted cucumber plant growth in vitro
- Taxon
- cucumberCucumis sativuse1
- Treatment
- All promising isolates, except of Pseudomonas flourescens V69e4
- Outcome
- plant growthe4
- Direction
- promotede4
- Setting
- in vitro conditione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e4“All promising isolates, except of Pseudomonas flourescens V69, promoted significantly plant growth under in vitro condition”
Claim · model-written summary
Pseudomonas flourescens CV69 and V11 showed the highest colonization on the cucumber root
- Taxon
- cucumberCucumis sativuse1
- Treatment
- P. flourescens CV69 and V11e5
- Interactor
- P. flourescens CV69 and V11e5symbiont
- Outcome
- colonization on the roote5
- Direction
- higheste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e5“P. flourescens CV69 and V11 exhibited the highest colonization on the root”
Claim · model-written summary
Strain CV6 used as a soil treatment reduced cucumber disease incidence by 85.71 percent in greenhouse studies
- Taxon
- cucumberCucumis sativuse1
- Treatment
- use of strains CV6 and V11 as a soil treatmente6
- Interactor
- Phytophthora drechsleriPhytophthora drechslerie1pathogen
- Outcome
- disease incidencee7
- Direction
- reductione7
- Value
- 85.71e6
- Setting
- greenhouse studiese7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e6“use of strains CV6 and V11 as a soil treatment, exhibited a reduction in disease incidence so that suppressed disease by 85.71 and 69.39% respectively”
e7“Results of the greenhouse studies showed that a reduction in disease incidence by use of some strains”
Claim · model-written summary
Strain V11 used as a soil treatment reduced cucumber disease incidence by 69.39 percent in greenhouse studies
- Taxon
- cucumberCucumis sativuse1
- Treatment
- use of strains CV6 and V11 as a soil treatmente6
- Interactor
- Phytophthora drechsleriPhytophthora drechslerie1pathogen
- Outcome
- disease incidencee7
- Direction
- reductione7
- Value
- 69.39%e6
- Setting
- greenhouse studiese7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e6“use of strains CV6 and V11 as a soil treatment, exhibited a reduction in disease incidence so that suppressed disease by 85.71 and 69.39% respectively”
e7“Results of the greenhouse studies showed that a reduction in disease incidence by use of some strains”
Claim · model-written summary
Pseudomonas flourescens CV6 significantly suppressed cucumber disease compared with Ridomil fungicide
- Taxon
- cucumberCucumis sativuse1
- Treatment
- Pseudomonas flourescens CV6e2
- Interactor
- Phytophthora drechsleriPhytophthora drechslerie1pathogen
- Second interactor
- Pseudomonas flourescens CV6e2biocontrol_agent
- Outcome
- diseasee2
- Direction
- suppressede2
- Comparator
- Ridomil fungicidee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e2“Pseudomonas flourescens CV6 significantly suppressed disease in comparison to Ridomil fungicide”
Claim · model-written summary
A mixture of bacterial strains in soil inoculated with the fungus did not differ significantly from infected control soil without bacteria in plant falling down
- Taxon
- cucumberCucumis sativuse1
- Treatment
- use of mixture bacterial strains in the soile2
- Interactor
- Phytophthora drechsleriPhytophthora drechslerie1pathogen
- Second interactor
- bacterial strainse2biocontrol_agent
- Outcome
- falling down the most of the plantse2
- Direction
- no_changeinferrede2
- Comparator
- infected control soils without bacteriae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“screened as potential biological control agents against Phytophthora drechsleri, the causal agent of cucumber root rot, in vitro condition”
e2“The use of mixture bacterial strains in the soil inoculated by the fungus resulting in falling down the most of the plants which didn't show significant difference with infected control soils without bacteria”
The same questions in other papers
Pseudomonas · growth · Cucumis sativus (cucumber)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.