Abstract
AIMS: Show that tomato leaf phyllosphere bacteria are candidates for biocontrol of tomato leaf diseases. METHODS AND RESULTS: Seven bacterial isolates from surface-sterilized Moneymaker tomato plants were tested for growth inhibition of 14 tomato pathogens on potato dextrose agar. Biocontrol assays were conducted with tomato leaf pathogens, Pseudomonas syringae pv. tomato (Pto) and Alternaria solani (A. solani). Two potential isolates showing the greatest inhibition were identified by 16S rDNA sequencing as Rhizobium sp. (isolate b1) and Bacillus subtilis (isolate b2), both produce protease and isolate b2 cellulase. Both reduced tomato leaf infections by Pto and A. solani in detached leaf bioassays. Both bacteria b1 and b2 reduced pathogen development in a tomato growth trial. Bacteria b2 also induced the tomato plant salicylic acid (SA) immune response pathway. Disease suppression in biocontrol assays with b1 and b2 varied between five commercial tomato varieties. CONCLUSIONS: Tomato phyllosphere bacteria when used as phyllosphere inoculants, inhibited tomato diseases caused by Pto and A. solani.
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Claims 11
Claim · model-written summary
Rhizobium b1 and Bacillus b2 were identified as the most inhibitory candidate isolates.
- Taxon
- tomato
Solanum lycopersicumt0 - Interactor
- Rhizobium sp. (isolate b1)
Rhizobium sp.e0biocontrol_agent - Second interactor
- Bacillus subtilis (isolate b2)
Bacillus subtilise0biocontrol_agent - Outcome
- greatest inhibitione0
- Value
- Twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two potential isolates showing the greatest inhibition were identified by 16S rDNA sequencing as Rhizobium sp. (isolate b1) and Bacillus subtilis (isolate b2)”
t0“tomato leaf diseases”
Claim · model-written summary
Rhizobium b1 produced protease.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Rhizobium b1t0biocontrol_agent
- Outcome
- produce proteasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both produce protease and isolate b2 cellulase”
t0“Phyllosphere bacterial strains Rhizobium b1 and Bacillus subtilis b2 control tomato leaf diseases”
Claim · model-written summary
Bacillus b2 produced protease and cellulase.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- Bacillus subtilis b2
Bacillus subtilis B2t0biocontrol_agent - Outcome
- produce protease and isolate b2 cellulasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both produce protease and isolate b2 cellulase”
t0“Phyllosphere bacterial strains Rhizobium b1 and Bacillus subtilis b2 control tomato leaf diseases”
Claim · model-written summary
Rhizobium b1 reduced Pto leaf infections in detached tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Rhizobium b1t0
- Interactor
- Ptoe0pathogen
- Second interactor
- Rhizobium b1t0biocontrol_agent
- Outcome
- tomato leaf infections by Ptoe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both reduced tomato leaf infections by Pto and A. solani in detached leaf bioassays”
t0“Phyllosphere bacterial strains Rhizobium b1 and Bacillus subtilis b2 control tomato leaf diseases caused by Pseudomonas syringae pv. tomato and Alternaria solani”
Claim · model-written summary
Rhizobium b1 reduced A. solani leaf infections in detached tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Rhizobium b1t0
- Interactor
- A. solani
Alternaria solanie0pathogen - Second interactor
- Rhizobium b1t0biocontrol_agent
- Outcome
- tomato leaf infections by Pto and A. solanie0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both reduced tomato leaf infections by Pto and A. solani in detached leaf bioassays”
t0“Phyllosphere bacterial strains Rhizobium b1 and Bacillus subtilis b2 control tomato leaf diseases caused by Pseudomonas syringae pv. tomato and Alternaria solani”
Claim · model-written summary
Bacillus b2 reduced Pto leaf infections in detached tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Bacillus subtilis b2t0
- Interactor
- Ptoe0pathogen
- Second interactor
- Bacillus subtilis b2Bacillus subtilis B2t0biocontrol_agent
- Outcome
- tomato leaf infections by Ptoe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both reduced tomato leaf infections by Pto and A. solani in detached leaf bioassays”
t0“Phyllosphere bacterial strains Rhizobium b1 and Bacillus subtilis b2 control tomato leaf diseases caused by Pseudomonas syringae pv. tomato and Alternaria solani”
Claim · model-written summary
Bacillus b2 reduced A. solani leaf infections in detached tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Bacillus subtilis b2t0
- Interactor
- A. solaniAlternaria solanie0pathogen
- Second interactor
- Bacillus subtilis b2Bacillus subtilis B2t0biocontrol_agent
- Outcome
- tomato leaf infections by Pto and A. solanie0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both reduced tomato leaf infections by Pto and A. solani in detached leaf bioassays”
t0“Phyllosphere bacterial strains Rhizobium b1 and Bacillus subtilis b2 control tomato leaf diseases caused by Pseudomonas syringae pv. tomato and Alternaria solani”
Claim · model-written summary
Rhizobium b1 reduced pathogen development in tomato growth trial.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- b1e0
- Interactor
- b1e0biocontrol_agent
- Outcome
- pathogen developmente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both bacteria b1 and b2 reduced pathogen development in a tomato growth trial”
Claim · model-written summary
Bacillus b2 reduced pathogen development in tomato growth trial.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- b2e0
- Interactor
- b2e0biocontrol_agent
- Outcome
- pathogen developmente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both bacteria b1 and b2 reduced pathogen development in a tomato growth trial”
Claim · model-written summary
Bacillus b2 induced the tomato salicylic-acid immune response pathway.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Bacteria b2e0
- Interactor
- b2e0biocontrol_agent
- Outcome
- salicylic acid (SA) immune response pathwaye0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacteria b2 also induced the tomato plant salicylic acid (SA) immune response pathway”
Claim · model-written summary
Disease suppression by b1 and b2 varied across five commercial tomato varieties.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- commercial tomato varietiese0
- Interactor
- b1e0biocontrol_agent
- Second interactor
- b2e0biocontrol_agent
- Outcome
- Disease suppressione0
- Value
- fivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease suppression in biocontrol assays with b1 and b2 varied between five commercial tomato varieties”
The same questions in other papers
Bacillus subtilis · organism · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
Bacillus subtilis · Alternaria solani · 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 →inoculation · physiology: hormones · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
9 papers more in this group
See all 13 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.