Abstract
Arabidopsis thaliana ecotype Columbia plants (Col-0) treated with plant growth-promoting rhizobacteria (PGPR) Serattia marcescens strain 90-166 and Bacillus pumilus strain SE34 had significantly reduced symptom severity by Cucumber mosaic virus (CMV). In some cases, CMV accumulation was also significantly reduced in systemically infected leaves. The signal transduction pathway(s) associated with induced resistance against CMV by strain 90-166 was determined using mutant strains and transgenic and mutant Arabidopsis lines. NahG plants treated with strains 90-166 and SE34 had reduced symptom severity indicating that the resistance did not require salicylic acid (SA). Strain 90-166 naturally produces SA under iron-limited conditions. Col-0 and NahG plants treated with the SA-deficient mutant, 90-166-1441, had significantly reduced CMV symptom severity with reduced virus accumulation in Col-0 plants. Another PGPR mutant, 90-166-2882, caused reduced disease severity in Col-0 and NahG plants. In a time course study, strain 90-166 reduced virus accumulation at 7 but not at 14 and 21 days post-inoculation (dpi) on the non-inoculated leaves of Col-0 plants. NahG and npr1-1 plants treated with strain 90-166 had reduced amounts of virus at 7 and 14 dpi but not at 21 dpi. In contrast, no decrease in CMV accumulation occurred in strain 90-166-treated fad3-2 fad7-2 fad8 plants. These data indicate that the protection of Arabidopsis against CMV by strain 90-166 follows a signaling pathway for virus protection that is independent of SA and NPR1, but dependent on jasmonic acid.
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Claims 9
Claim · model-written summary
Strains 90-166 and SE34 significantly reduced CMV symptom severity.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Material
- Col-0e0
- Treatment
- Serattia marcescens strain 90-166 and Bacillus pumilus strain SE34e0
- Interactor
- Cucumber mosaic virus (CMV)
cucumber mosaic cucumoviruse0pathogen - Second interactor
- Serattia marcescens strain 90-166e0biocontrol_agent
- Outcome
- symptom severity by Cucumber mosaic virus (CMV)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis thaliana ecotype Columbia plants (Col-0) treated with plant growth-promoting rhizobacteria (PGPR) Serattia marcescens strain 90-166 and Bacillus pumilus strain SE34 had significantly reduced symptom severity by Cucumber mosaic virus (CMV)”
Claim · model-written summary
CMV accumulation was significantly reduced in some systemically infected leaves.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Organ / stage
- systemically infected leavese0
- Interactor
- CMVcucumber mosaic cucumoviruse0pathogen
- Outcome
- CMV accumulatione0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In some cases, CMV accumulation was also significantly reduced in systemically infected leaves”
t0“Arabidopsis thaliana”
Claim · model-written summary
NahG plants treated with the strains had reduced symptom severity.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- NahGe0
- Treatment
- strains 90-166 and SE34e0
- Interactor
- strains 90-166 and SE34e0biocontrol_agent
- Outcome
- symptom severitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NahG plants treated with strains 90-166 and SE34 had reduced symptom severity indicating that the resistance did not require salicylic acid (SA)”
t0“Arabidopsis thaliana”
Claim · model-written summary
SA deficient 90-166-1441 reduced symptom severity and virus accumulation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- Col-0 and NahGe0
- Treatment
- SA-deficient mutant, 90-166-1441e0
- Interactor
- CMVcucumber mosaic cucumoviruse0pathogen
- Second interactor
- 90-166-1441e0biocontrol_agent
- Outcome
- CMV symptom severitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Col-0 and NahG plants treated with the SA-deficient mutant, 90-166-1441, had significantly reduced CMV symptom severity with reduced virus accumulation in Col-0 plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
The PGPR mutant 90-166-2882 reduced disease severity.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- Col-0 and NahGe0
- Treatment
- 90-166-2882e0
- Interactor
- 90-166-2882e0biocontrol_agent
- Outcome
- disease severitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Another PGPR mutant, 90-166-2882, caused reduced disease severity in Col-0 and NahG plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
Strain 90-166 reduced virus accumulation at 7 dpi but not 14 or 21 dpi in Col-0.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- Col-0e0
- Treatment
- strain 90-166e0
- Interactor
- strain 90-166e0biocontrol_agent
- Outcome
- virus accumulatione0
- Direction
- reducede0
- Qualifier
- at 7 but not at 14 and 21 days post-inoculation (dpi)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain 90-166 reduced virus accumulation at 7 but not at 14 and 21 days post-inoculation (dpi) on the non-inoculated leaves of Col-0 plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
NahG and npr1-1 plants had less virus at 7 and 14 but not 21 dpi after strain 90-166.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- NahG and npr1-1e0
- Treatment
- strain 90-166e0
- Interactor
- strain 90-166e0biocontrol_agent
- Outcome
- amounts of viruse0
- Direction
- reducede0
- Qualifier
- at 7 and 14 dpi but not at 21 dpie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NahG and npr1-1 plants treated with strain 90-166 had reduced amounts of virus at 7 and 14 dpi but not at 21 dpi”
t0“Arabidopsis thaliana”
Claim · model-written summary
Strain 90-166 did not reduce CMV accumulation in fad3-2 fad7-2 fad8.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- fad3-2 fad7-2 fad8e0
- Treatment
- strain 90-166-treatede0
- Interactor
- CMVcucumber mosaic cucumoviruse0pathogen
- Second interactor
- strain 90-166e0biocontrol_agent
- Outcome
- CMV accumulatione0
- Direction
- no decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no decrease in CMV accumulation occurred in strain 90-166-treated fad3-2 fad7-2 fad8 plants”
t0“Arabidopsis thaliana”
Claim · model-written summary
The authors infer SA and NPR1 independence and jasmonic acid dependence.
- Taxon
- ArabidopsisArabidopsise0
- Interactor
- CMVcucumber mosaic cucumoviruse0pathogen
- Second interactor
- strain 90-166e0biocontrol_agent
- Outcome
- protection of Arabidopsis against CMVe0
- Qualifier
- independent of SA and NPR1, but dependent on jasmonic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protection of Arabidopsis against CMV by strain 90-166 follows a signaling pathway for virus protection that is independent of SA and NPR1, but dependent on jasmonic acid”
The same questions in other papers
loss of function · cucumber mosaic cucumovirus · Arabidopsis thaliana (thale cress)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
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.