Abstract
The majority of plant growth promoting rhizobacteria (PGPR) confer plant immunity against a wide range of foliar diseases by activating plant defences that reduce a plant's susceptibility to pathogen attack. Here we show that Arabidopsis thaliana (Col-0) plants exposed to Bacillus subtilis strain FB17 (hereafter FB17), results in reduced disease severity against Pseudomonas syringae pv. tomato DC3000 (hereafter DC3000) compared to plants without FB17 treatment. Exogenous application of the B. subtilis derived elicitor, acetoin (3-hydroxy-2-butanone), was found to trigger induced systemic resistance (ISR) and protect plants against DC3000 pathogenesis. Moreover, B. subtilis acetoin biosynthetic mutants that emitted reduced levels of acetoin conferred reduced protection to A. thaliana against pathogen infection. Further analysis using FB17 and defense-compromised mutants of A. thaliana indicated that resistance to DC3000 occurs via NPR1 and requires salicylic acid (SA)/ethylene (ET) whereas jasmonic acid (JA) is not essential. This study provides new insight into the role of rhizo-bacterial volatile components as elicitors of defense responses in plants.
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Claims 7
Claim · model-written summary
FB17 exposure reduced disease severity relative to untreated plants.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Material
- Col-0e0
- Treatment
- exposed to Bacillus subtilis strain FB17e0
- Interactor
- Pseudomonas syringae pv. tomato DC3000Pseudomonas syringae pv. tomato str. DC3000e0pathogen
- Second interactor
- Bacillus subtilis strain FB17
Bacillus subtilise0biocontrol_agent - Outcome
- disease severitye0
- Direction
- reducede0
- Comparator
- plants without FB17 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana (Col-0) plants exposed to Bacillus subtilis strain FB17 (hereafter FB17), results in reduced disease severity against Pseudomonas syringae pv. tomato DC3000 (hereafter DC3000) compared to plants without FB17 treatment.”
Claim · model-written summary
Applied acetoin triggered systemic resistance.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Exogenous application of the B. subtilis derived elicitor, acetoin (3-hydroxy-2-butanone)e0
- Interactor
- B. subtilisBacillus subtilise0biocontrol_agent
- Outcome
- induced systemic resistance (ISR)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of the B. subtilis derived elicitor, acetoin (3-hydroxy-2-butanone), was found to trigger induced systemic resistance (ISR)”
t0“Arabidopsis thaliana”
Claim · model-written summary
Applied acetoin protected plants against DC3000 pathogenesis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- acetoin (3-hydroxy-2-butanone)e0
- Interactor
- DC3000e0pathogen
- Outcome
- DC3000 pathogenesise0
- Direction
- protecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acetoin (3-hydroxy-2-butanone), was found to trigger induced systemic resistance (ISR) and protect plants against DC3000 pathogenesis.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Bacterial mutants producing less acetoin gave reduced protection.
- Taxon
- A. thalianaArabidopsis thalianae0
- Treatment
- B. subtilis acetoin biosynthetic mutantse0
- Interactor
- B. subtilisBacillus subtilise0biocontrol_agent
- Outcome
- protectione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B. subtilis acetoin biosynthetic mutants that emitted reduced levels of acetoin conferred reduced protection to A. thaliana against pathogen infection.”
Claim · model-written summary
Resistance to DC3000 occurred through NPR1.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Interactor
- DC3000e0pathogen
- Gene
- NPR1e0
- Outcome
- resistance to DC3000e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistance to DC3000 occurs via NPR1 and requires salicylic acid (SA)/ethylene (ET) whereas jasmonic acid (JA) is not essential.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Resistance to DC3000 required salicylic acid and ethylene.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Interactor
- DC3000e0pathogen
- Compound
- salicylic acid (SA)/ethylene (ET)e0
- Outcome
- resistance to DC3000e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistance to DC3000 occurs via NPR1 and requires salicylic acid (SA)/ethylene (ET) whereas jasmonic acid (JA) is not essential.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Jasmonic acid was not essential for resistance to DC3000.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Interactor
- DC3000e0pathogen
- Compound
- jasmonic acid (JA)e0
- Outcome
- resistance to DC3000e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistance to DC3000 occurs via NPR1 and requires salicylic acid (SA)/ethylene (ET) whereas jasmonic acid (JA) is not essential.”
t0“Arabidopsis thaliana”
The same questions in other papers
resistance inducer · disease · Arabidopsis thaliana (thale cress)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
2 papers more in this group
See all 6 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.