Abstract
Biocontrol agent, Bacillus subtilis, was screened in a laboratory experiment against 6 necrotrophic fungi. These fungi were isolated from diseased plant materials. This biocontrol agent exhibited different potentials. It was highly effective against Fusarium oxysporum f. sp. lycopersici which causes tomato wilt and Fusarium oxysporum f. sp. fabae which causes broad bean wilt. It inhibited radial growth (RGI) by more than 75 %. However, it was less effective against Phytophthora infestans (64.7 % RGI), Botrytis cinerea (58.3 % RGI), Sclerotinia sclerotiorum (57.4 % RGI) Rhizoctonia solani (42.7 % RGI). When B. subtilis was applied to Tomato field, it exhibited different efficiency in suppressing Fusarium wilt. Time of implementation was critical for the efficacy of B. subtilis. It strongly suppressed wilt when applied 7 days before transplanting, by showing 72.7, healthy plant percentage (HP), followed by application at cotyledon stage (69.4 % HP). Salicylic acid was comparable to B. subtilis in protecting tomato against vascular wilt (68.3 % HP). Different mechanisms may be involved in the activity of B. subtilis in field. According to the laboratory test, diffusible suppressive substances as well as lytic enzymes may be produced by this biocontrol agent.Egyptian Journal of Biotechnology Vol. 25 (1) 2007: pp. 1-12
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Claims 10
Claim · model-written summary
Bacillus subtilis inhibited Fusarium oxysporum f. sp. lycopersici radial growth by more than 75%.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- Bacillus subtilise1
- Interactor
- Fusarium oxysporum f. sp. lycopersici
Fusarium oxysporum f. sp. lycopersicie0pathogen - Second interactor
- Bacillus subtilis
Bacillus subtilise1biocontrol_agent - Outcome
- radial growth (RGI)e0
- Direction
- inhibitede0
- Value
- more than 75 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato plants”
e0“highly effective against Fusarium oxysporum f. sp. lycopersici which causes tomato wilt and Fusarium oxysporum f. sp. fabae which causes broad bean wilt. It inhibited radial growth (RGI) by more than 75 %”
e1“Biocontrol agent, Bacillus subtilis, was screened”
Claim · model-written summary
Bacillus subtilis inhibited Fusarium oxysporum f. sp. fabae radial growth by more than 75%.
- Taxon
- broad bean
Vicia fabae0 - Treatment
- Bacillus subtilise1
- Interactor
- Fusarium oxysporum f. sp. fabaeFusarium oxysporum f. sp. fabaee0pathogen
- Second interactor
- Bacillus subtilisBacillus subtilise1biocontrol_agent
- Outcome
- radial growth (RGI)e0
- Direction
- inhibitede0
- Value
- more than 75 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fusarium oxysporum f. sp. fabae which causes broad bean wilt. It inhibited radial growth (RGI) by more than 75 %”
e1“Biocontrol agent, Bacillus subtilis, was screened”
Claim · model-written summary
Bacillus subtilis inhibited Phytophthora infestans radial growth by 64.7%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Bacillus subtilise1
- Interactor
- Phytophthora infestans
Phytophthora infestanse0pathogen - Second interactor
- Bacillus subtilisBacillus subtilise1biocontrol_agent
- Outcome
- RGIe0
- Direction
- less effectivee0
- Value
- 64.7 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“less effective against Phytophthora infestans (64.7 % RGI)”
e1“Biocontrol agent, Bacillus subtilis, was screened”
Claim · model-written summary
Bacillus subtilis inhibited Botrytis cinerea radial growth by 58.3%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Bacillus subtilise1
- Interactor
- Botrytis cinerea
Botrytis cinereae0pathogen - Second interactor
- Bacillus subtilisBacillus subtilise1biocontrol_agent
- Outcome
- RGIe0
- Value
- 58.3 %e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Botrytis cinerea (58.3 % RGI)”
e1“Biocontrol agent, Bacillus subtilis, was screened”
Claim · model-written summary
Bacillus subtilis inhibited Sclerotinia sclerotiorum radial growth by 57.4%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Bacillus subtilise1
- Interactor
- Sclerotinia sclerotiorum
Sclerotinia sclerotiorume0pathogen - Second interactor
- Bacillus subtilisBacillus subtilise1biocontrol_agent
- Outcome
- RGIe0
- Value
- 57.4 %e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Sclerotinia sclerotiorum (57.4 % RGI)”
e1“Biocontrol agent, Bacillus subtilis, was screened”
Claim · model-written summary
Bacillus subtilis inhibited Rhizoctonia solani radial growth by 42.7%.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Bacillus subtilise1
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie0pathogen - Second interactor
- Bacillus subtilisBacillus subtilise1biocontrol_agent
- Outcome
- RGIe0
- Value
- 42.7 %e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Rhizoctonia solani (42.7 % RGI)”
e1“Biocontrol agent, Bacillus subtilis, was screened”
Claim · model-written summary
Applying B. subtilis seven days before transplanting strongly suppressed tomato wilt, with 72.7 healthy plant percentage.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- B. subtilise1
- Interactor
- B. subtilisBacillus subtilise1biocontrol_agent
- Outcome
- healthy plant percentage (HP)e0
- Direction
- suppressede0
- Value
- 72.7e0
- Qualifier
- 7 days before transplantinge0
- Setting
- Tomato fielde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“It strongly suppressed wilt when applied 7 days before transplanting, by showing 72.7, healthy plant percentage (HP)”
e1“When B. subtilis was applied to Tomato field”
Claim · model-written summary
Applying B. subtilis at the cotyledon stage yielded 69.4% healthy tomato plants.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- cotyledon stagee0
- Treatment
- B. subtilise1
- Interactor
- B. subtilisBacillus subtilise1biocontrol_agent
- Outcome
- HPe0
- Value
- 69.4 %e0
- Setting
- Tomato fielde1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“followed by application at cotyledon stage (69.4 % HP)”
e1“When B. subtilis was applied to Tomato field”
Claim · model-written summary
Salicylic acid protected tomato against vascular wilt with 68.3% healthy plants, comparable to B. subtilis.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Salicylic acide0
- Interactor
- B. subtilisBacillus subtilise0biocontrol_agent
- Outcome
- vascular wilt (68.3 % HP)e0
- Direction
- comparablee0
- Value
- 68.3 %e0
- Comparator
- B. subtilise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Salicylic acid was comparable to B. subtilis in protecting tomato against vascular wilt (68.3 % HP)”
Claim · model-written summary
The laboratory assay suggested Bacillus subtilis may produce diffusible suppressive substances and lytic enzymes.
- Taxon
- TomatoSolanum lycopersicumt0
- Interactor
- Bacillus subtilisBacillus subtilise1biocontrol_agent
- Outcome
- diffusible suppressive substances as well as lytic enzymese0
- Qualifier
- may be producede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“According to the laboratory test, diffusible suppressive substances as well as lytic enzymes may be produced by this biocontrol agent”
e1“Biocontrol agent, Bacillus subtilis, was screened”
The same questions in other papers
Bacillus subtilis · Fusarium oxysporum f. sp. fabae · Vicia faba (faba bean)Results agree
1 paper in the same direction as this paper
- positive
Bacillus subtilis · Sclerotinia sclerotiorum · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
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- positive
Bacillus subtilis · Botrytis cinerea · Solanum lycopersicum (tomato)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Bacillus subtilis · Rhizoctonia solani · Solanum lycopersicum (tomato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
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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.