Abstract
The fungus Fusarium oxysporum f. sp. radicis-lycopersici causes foot and root rot of tomato plants, which can be controlled by the bacteria Pseudomonas fluorescens WCS365 and P. chlororaphis PCL1391. Induced systemic resistance is thought to be involved in biocontrol by P. fluorescens WCS365. The antifungal metabolite phenazine-1-carboxamide (PCN), as well as efficient root colonization, are essential in the mechanism of biocontrol by P. chlororaphis PCL1391. To understand the effects of bacterial strains WCS365 and PCL1391 on the fungus in the tomato rhizosphere, microscopic analyses were performed using different autofluorescent proteins as markers. Tomato seedlings were inoculated with biocontrol bacteria and planted in an F. oxysporum f. sp. radicis-lycopersici-infested gnotobiotic sand system. Confocal laser scanning microscope analyses of the interactions in the tomato rhizosphere revealed that i) the microbes effectively compete for the same niche, and presumably also for root exudate nutrients; ii) the presence of either of the two bacteria negatively affects infection of the tomato root by the fungus; iii) both biocontrol bacteria colonize the hyphae extensively, which may represent a new mechanism in biocontrol by these pseudomonads; and iv) the production of PCN by P. chlororaphis PCL1391 negatively affects hyphal growth and branching, which presumably affects the colonization and infecting ability of the fungus.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
The microbes compete for the same niche in the tomato rhizosphere.
- Taxon
- tomato
Solanum lycopersicume0 - Outcome
- microbes effectively compete for the same nichee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Confocal laser scanning microscope analyses of the interactions in the tomato rhizosphere revealed that i) the microbes effectively compete for the same niche”
Claim · model-written summary
One biocontrol bacterium reduced Fusarium infection of tomato roots.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- two bacteriae0
- Outcome
- infection of the tomato root by the funguse0
- Direction
- negatively affectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the presence of either of the two bacteria negatively affects infection of the tomato root by the fungus”
Claim · model-written summary
Both biocontrol bacteria extensively colonized fungal hyphae.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- both biocontrol bacteria colonize the hyphae extensivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both biocontrol bacteria colonize the hyphae extensively”
t0“Tomato”
Claim · model-written summary
Phenazine production by P. chlororaphis PCL1391 reduced fungal hyphal growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- P. chlororaphis PCL1391Pseudomonas chlororaphise0biocontrol_agentt0
- Compound
- PCNe0
- Outcome
- hyphal growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the production of PCN by P. chlororaphis PCL1391 negatively affects hyphal growth and branching”
t0“Tomato Rhizosphere of TwoPseudomonasBiocontrol Strains”
Claim · model-written summary
Phenazine production by P. chlororaphis PCL1391 reduced fungal hyphal branching.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- P. chlororaphis PCL1391Pseudomonas chlororaphise0biocontrol_agentt0
- Compound
- PCNe0
- Outcome
- branchinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the production of PCN by P. chlororaphis PCL1391 negatively affects hyphal growth and branching”
t0“Tomato Rhizosphere of TwoPseudomonasBiocontrol Strains”
The same questions in other papers
inoculation · organism · Solanum lycopersicum (tomato)Positive and negative results
13 papers in the same direction as this paper · 15 in the opposite direction
- negative
- negative
- no effect
25 papers more in this group
See all 29 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.