Abstract
Bacillus subtilis strain FZB-G was tested for its ability to produce probiotic substances and induce systemic resistance in tomato against Fusarium oxysporum f. sp. radicis-lycopersici (FORL) causing wilt disease. Culture filtrate collected from transition growth phase (10-20 h post-inoculation) of bacterial strain FZB-G induced systemic resistance in tomato seedlings against FORL, besides promoting the root growth of seedlings. Bacterial culture filtrate from stationary growth phase (72 h post-inoculation) was highly fungi toxic to FORL, however, it did nor induce systemic resistance in tomato seedlings against FORL. On fractionation of culture filtrate from transition phase, one of its fractions (Tr-C) stimulated root growth and induced systemic resistance in tomato seedlings against Fusarium wilt. Upon bioassay with plant-pathogen (Tomato-FORL) system, this fraction Tr-C was found to behave more like an auxin precursor, indole-3-pyruvic acid, in induction of systemic resistance and stimulation of root growth. Thus, it indicates that fraction Tr-C contains an elicitor resembling to a precursor of phytohormones which might be involved in signal triggering and transduction, or in defence gene activation for the production of biochemical compounds associated with host defence.
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Claims 8
Claim · model-written summary
Transition-phase FZB-G culture filtrate induced systemic resistance in tomato seedlings against FORL.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Culture filtrate collected from transition growth phase (10-20 h post-inoculation) of bacterial strain FZB-Ge0
- Interactor
- FORLe0pathogen
- Second interactor
- bacterial strain FZB-Ge0biocontrol_agent
- Outcome
- systemic resistancee0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Culture filtrate collected from transition growth phase (10-20 h post-inoculation) of bacterial strain FZB-G induced systemic resistance in tomato seedlings against FORL”
Claim · model-written summary
Transition-phase FZB-G filtrate promoted tomato seedling root growth.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Culture filtrate collected from transition growth phase (10-20 h post-inoculation) of bacterial strain FZB-Ge0
- Interactor
- FORLe0pathogen
- Second interactor
- bacterial strain FZB-Ge0biocontrol_agent
- Outcome
- root growthe0
- Direction
- promotinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Culture filtrate collected from transition growth phase (10-20 h post-inoculation) of bacterial strain FZB-G induced systemic resistance in tomato seedlings against FORL, besides promoting the root growth of seedlings”
Claim · model-written summary
Stationary-phase bacterial filtrate was highly toxic to FORL fungi.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Bacterial culture filtrate from stationary growth phase (72 h post-inoculation)e0
- Interactor
- FORLe0pathogen
- Outcome
- fungi toxic to FORLe0
- Direction
- highly fungi toxice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial culture filtrate from stationary growth phase (72 h post-inoculation) was highly fungi toxic to FORL”
t0“tomato against Fusarium wilt”
Claim · model-written summary
Stationary-phase filtrate did not induce systemic resistance in tomato seedlings against FORL.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Bacterial culture filtrate from stationary growth phase (72 h post-inoculation)e0
- Interactor
- FORLe0pathogen
- Outcome
- systemic resistancee0
- Direction
- did nor inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial culture filtrate from stationary growth phase (72 h post-inoculation) was highly fungi toxic to FORL, however, it did nor induce systemic resistance in tomato seedlings against FORL”
Claim · model-written summary
Transition-phase fraction Tr-C stimulated tomato seedling root growth.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Tr-Ce0
- Outcome
- root growthe0
- Direction
- stimulatede0
FusariumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one of its fractions (Tr-C) stimulated root growth and induced systemic resistance in tomato seedlings against Fusarium wilt”
Claim · model-written summary
Transition-phase fraction Tr-C induced tomato systemic resistance against Fusarium wilt.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Tr-Ce0
- Outcome
- systemic resistancee0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one of its fractions (Tr-C) stimulated root growth and induced systemic resistance in tomato seedlings against Fusarium wilt”
Claim · model-written summary
Fraction Tr-C behaved similarly to indole-3-pyruvic acid in inducing resistance and stimulating tomato root growth.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- Tr-Ce0
- Compound
- indole-3-pyruvic acide0
- Outcome
- induction of systemic resistance and stimulation of root growthe0
- Direction
- more likee0
- Comparator
- indole-3-pyruvic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this fraction Tr-C was found to behave more like an auxin precursor, indole-3-pyruvic acid, in induction of systemic resistance and stimulation of root growth”
t0“tomato against Fusarium wilt”
Claim · model-written summary
The authors infer that Tr-C contains a phytohormone-precursor-like elicitor potentially involved in defence signalling or gene activation.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Tr-Ce0
- Outcome
- host defencee0
- Qualifier
- might be involved in signal triggering and transduction, or in defence gene activatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fraction Tr-C contains an elicitor resembling to a precursor of phytohormones which might be involved in signal triggering and transduction, or in defence gene activation for the production of biochemical compounds associated with host defence”
t0“tomato against Fusarium wilt”
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