Abstract
ABSTRACT Two strains of plant growth-promoting rhizobacteria (PGPR), Bacillus pumilus SE34 and Pseudomonas fluorescens 89B61, elicited systemic protection against late blight on tomato and reduced disease severity by a level equivalent to systemic acquired resistance induced by Phytophthora infestans or induced local resistance by chemical inducer beta-amino butyric acid (BABA) in greenhouse assays. Germination of sporangia and zoospores of P. infestans on leaf surfaces of tomato plants treated with the two PGPR strains, pathogen, and chemical BABA was significantly reduced compared with the noninduced control. Induced protection elicited by PGPR, pathogen, and BABA were examined to determine the signal transduction pathways in three tomato lines: salicylic acid (SA)-hydroxylase transgenic tomato (nahG), ethylene insensitive mutants (Nr/Nr), and jasmonic acid insensitive mutants (def1). Results suggest that induced protection elicited by both bacilli and pseudomonad PGPR strains was SA-independent but ethylene- and jasmonic acid-dependent, whereas systemic acquired resistance elicited by the pathogen and induced local resistance by BABA were SA-dependent. The lack of colonization of tomato leaves by strain 89B61 suggests that the observed induced systemic resistance (ISR) was due to systemic protection by strain 89B61 and not attributable to a direct interaction between pathogen and biological control agent. Although strain SE34 was detected on tomato leaves, ISR mainly accounted for the systemic protection with this strain.
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Claims 7
Claim · model-written summary
Bacillus pumilus SE34 reduced tomato late blight severity in greenhouse assays.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Bacillus pumilus SE34e0
- Interactor
- Phytophthora infestans
Phytophthora infestanse0pathogen - Second interactor
- Bacillus pumilus SE34Bacillus pumiluse0biocontrol_agent
- Outcome
- late blighte0
- Direction
- reducede0
- Setting
- greenhouse assayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two strains of plant growth-promoting rhizobacteria (PGPR), Bacillus pumilus SE34 and Pseudomonas fluorescens 89B61, elicited systemic protection against late blight on tomato and reduced disease severity by a level equivalent to systemic acquired resistance induced by Phytophthora infestans or induced local resistance by chemical inducer beta-amino butyric acid (BABA) in greenhouse assays.”
Claim · model-written summary
Pseudomonas fluorescens 89B61 reduced tomato late blight severity in greenhouse assays.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Pseudomonas fluorescens 89B61e0
- Interactor
- Phytophthora infestansPhytophthora infestanse0pathogen
- Second interactor
- Pseudomonas fluorescens 89B61
.JPG?width=60)
Pseudomonas fluorescense0biocontrol_agent - Outcome
- late blighte0
- Direction
- reducede0
- Setting
- greenhouse assayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Two strains of plant growth-promoting rhizobacteria (PGPR), Bacillus pumilus SE34 and Pseudomonas fluorescens 89B61, elicited systemic protection against late blight on tomato and reduced disease severity by a level equivalent to systemic acquired resistance induced by Phytophthora infestans or induced local resistance by chemical inducer beta-amino butyric acid (BABA) in greenhouse assays.”
Claim · model-written summary
PGPR, pathogen and BABA treatments reduced P. infestans sporangial and zoospore germination on tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- the two PGPR strains, pathogen, and chemical BABAe0
- Interactor
- P. infestansPhytophthora infestanse0pathogen
- Outcome
- Germination of sporangia and zoospores of P. infestanse0
- Direction
- reducede0
- Comparator
- noninduced controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination of sporangia and zoospores of P. infestans on leaf surfaces of tomato plants treated with the two PGPR strains, pathogen, and chemical BABA was significantly reduced compared with the noninduced control.”
Claim · model-written summary
PGPR induced protection was SA independent but ethylene and jasmonic acid dependent.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- induced protectione0
- Qualifier
- SA-independent but ethylene- and jasmonic acid-dependente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results suggest that induced protection elicited by both bacilli and pseudomonad PGPR strains was SA-independent but ethylene- and jasmonic acid-dependent, whereas systemic acquired resistance elicited by the pathogen and induced local resistance by BABA were SA-dependent.”
t0“Tomato”
Claim · model-written summary
Pathogen elicited systemic acquired resistance and BABA induced local resistance were SA dependent.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- systemic acquired resistancee0
- Qualifier
- SA-dependente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results suggest that induced protection elicited by both bacilli and pseudomonad PGPR strains was SA-independent but ethylene- and jasmonic acid-dependent, whereas systemic acquired resistance elicited by the pathogen and induced local resistance by BABA were SA-dependent.”
t0“Tomato”
Claim · model-written summary
Strain 89B61 did not colonize tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Interactor
- strain 89B61e0biocontrol_agent
- Outcome
- lack of colonization of tomato leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lack of colonization of tomato leaves by strain 89B61 suggests that the observed induced systemic resistance (ISR) was due to systemic protection by strain 89B61 and not attributable to a direct interaction between pathogen and biological control agent.”
Claim · model-written summary
Systemic resistance mainly accounted for protection by SE34.
- Taxon
- tomatoSolanum lycopersicume0
- Interactor
- strain SE34e0biocontrol_agent
- Outcome
- systemic protectione0
- Qualifier
- ISR mainly accountede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although strain SE34 was detected on tomato leaves, ISR mainly accounted for the systemic protection with this strain.”
The same questions in other papers
3-aminobutanoic acid · Phytophthora infestans · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- positive
Pseudomonas fluorescens · Phytophthora infestans · Solanum lycopersicum (tomato)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
inoculation · Phytophthora infestans · Solanum lycopersicum (tomato)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
4 papers more in this group
See all 8 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.