Abstract
BACKGROUND: Paenibacillus polymyxa is a plant-growth promoting rhizobacterium that could be exploited as an environmentally friendlier alternative to chemical fertilizers and pesticides. Various strains have been isolated that can benefit agriculture through antimicrobial activity, nitrogen fixation, phosphate solubilization, plant hormone production, or lignocellulose degradation. However, no single strain has yet been identified in which all of these advantageous traits have been confirmed. RESULTS: P. polymyxa CR1 was isolated from degrading corn roots from southern Ontario, Canada. It was shown to possess in vitro antagonistic activities against the common plant pathogens Phytophthora sojae P6497 (oomycete), Rhizoctonia solani 1809 (basidiomycete fungus), Cylindrocarpon destructans 2062 (ascomycete fungus), Pseudomonas syringae DC3000 (bacterium), and Xanthomonas campestris 93-1 (bacterium), as well as Bacillus cereus (bacterium), an agent of food-borne illness. P. polymyxa CR1 enhanced growth of maize, potato, cucumber, Arabidopsis, and tomato plants; utilized atmospheric nitrogen and insoluble phosphorus; produced the phytohormone indole-3-acetic acid (IAA); and degraded and utilized the major components of lignocellulose (lignin, cellulose, and hemicellulose). CONCLUSIONS: P. polymyxa CR1 has multiple beneficial traits that are relevant to sustainable agriculture and the bio-economy. This strain could be developed for field application in order to control pathogens, promote plant growth, and degrade crop residues after harvest.
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Claims 7
Claim · model-written summary
P. polymyxa CR1 was isolated from degrading corn roots.
- Taxon
- corn
Zea mays subsp. mayse0 - Organ / stage
- rootse0
- Interactor
- P. polymyxa CR1
Paenibacillus polymyxae0symbiont - Outcome
- P. polymyxa CR1 was isolatede0
- Setting
- southern Ontario, Canadae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. polymyxa CR1 was isolated from degrading corn roots from southern Ontario, Canada”
Claim · model-written summary
P. polymyxa CR1 antagonized Phytophthora sojae P6497 in vitro.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- Phytophthora sojae P6497Phytophthora sojaee0pathogen
- Second interactor
- P. polymyxa CR1Paenibacillus polymyxat0biocontrol_agent
- Outcome
- antagonistic activities against the common plant pathogens Phytophthora sojae P6497e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in vitro antagonistic activities against the common plant pathogens Phytophthora sojae P6497 (oomycete), Rhizoctonia solani 1809 (basidiomycete fungus), Cylindrocarpon destructans 2062 (ascomycete fungus), Pseudomonas syringae DC3000 (bacterium), and Xanthomonas campestris 93-1 (bacterium)”
t0“P. polymyxa CR1 was isolated from degrading corn roots”
Claim · model-written summary
P. polymyxa CR1 enhanced maize growth.
- Treatment
- P. polymyxa CR1e0
- Interactor
- P. polymyxa CR1Paenibacillus polymyxae0symbiont
- Outcome
- growthe0
- Direction
- enhancede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. polymyxa CR1 enhanced growth of maize, potato, cucumber, Arabidopsis, and tomato plants”
Claim · model-written summary
P. polymyxa CR1 enhanced potato growth.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- P. polymyxa CR1e0
- Interactor
- P. polymyxa CR1Paenibacillus polymyxae0symbiont
- Outcome
- growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. polymyxa CR1 enhanced growth of maize, potato, cucumber, Arabidopsis, and tomato plants”
Claim · model-written summary
P. polymyxa CR1 enhanced cucumber growth.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- P. polymyxa CR1e0
- Interactor
- P. polymyxa CR1Paenibacillus polymyxae0symbiont
- Outcome
- growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. polymyxa CR1 enhanced growth of maize, potato, cucumber, Arabidopsis, and tomato plants”
Claim · model-written summary
P. polymyxa CR1 enhanced Arabidopsis growth.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- P. polymyxa CR1e0
- Interactor
- P. polymyxa CR1Paenibacillus polymyxae0symbiont
- Outcome
- growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. polymyxa CR1 enhanced growth of maize, potato, cucumber, Arabidopsis, and tomato plants”
Claim · model-written summary
P. polymyxa CR1 enhanced tomato growth.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- P. polymyxa CR1e0
- Interactor
- P. polymyxa CR1Paenibacillus polymyxae0symbiont
- Outcome
- growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. polymyxa CR1 enhanced growth of maize, potato, cucumber, Arabidopsis, and tomato plants”
The same questions in other papers
Paenibacillus polymyxa · growth · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
Paenibacillus polymyxa · growth · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
Paenibacillus polymyxa · growth · Solanum lycopersicum (tomato)Results agree
3 papers in the same direction as this paper
- positive
- 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.