Abstract
Three hundred and fifty-four randomly selected bacteria from plant rhizospheres, when tested for activity against Meloidogyne incognita, caused a wide range of effects from a reduction to an increase of root galling on tomato and cucumber in greenhouse tests. Results were highly variable, even with strains that previously had given significant differences. A bioassay, based on selecting bacterial strains that produced nematicidal compounds in vitro, proved to be a better and more rapid means of identifying promising nematode antagonists. About 1% of more than 5,000 bacteria isolated from rhizospheres of different plants produced detectable compounds that affected the vitality of second-stage juveniles of M. incognita in an in vitro test. Twenty percent of these subsequently reduced the number of galls on cucumber in a soil-free pouch system when applied as a seed treatment. Selected strains were applied as a drench to nonsterile soil infested with M. incognita. White clover plants growing in bacteria-treated soil had fewer galls and larger root systems. Both plant top and root weights were significantly greater compared with the nontreated control
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Claims 10
Claim · model-written summary
Rhizosphere bacteria caused a range from reduced to increased root galling in tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- bacteria from plant rhizospherese0
- Interactor
- Meloidogyne incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitae0pathogen - Outcome
- root gallinge0
- Direction
- from a reduction to an increasee0
- Setting
- greenhouse testse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“bacteria from plant rhizospheres, when tested for activity against Meloidogyne incognita, caused a wide range of effects from a reduction to an increase of root galling on tomato and cucumber in greenhouse tests.”
Claim · model-written summary
Rhizosphere bacteria caused a range from reduced to increased root galling in cucumber.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- bacteria from plant rhizospherese0
- Interactor
- Meloidogyne incognitaMeloidogyne incognitae0pathogen
- Outcome
- root gallinge0
- Direction
- from a reduction to an increasee0
- Setting
- greenhouse testse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bacteria from plant rhizospheres, when tested for activity against Meloidogyne incognita, caused a wide range of effects from a reduction to an increase of root galling on tomato and cucumber in greenhouse tests.”
Claim · model-written summary
The effects varied considerably, including for previously significant strains.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- Results were highly variablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results were highly variable, even with strains that previously had given significant differences.”
e1“root galling on tomato and cucumber”
Claim · model-written summary
An in vitro nematicidal screen identified promising nematode antagonists more rapidly and effectively.
- Taxon
- cucumberCucumis sativuse1
- Outcome
- identifying promising nematode antagonistse0
- Comparator
- better and more rapid meanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A bioassay, based on selecting bacterial strains that produced nematicidal compounds in vitro, proved to be a better and more rapid means of identifying promising nematode antagonists.”
e1“root galling on tomato and cucumber”
Claim · model-written summary
About 1% of rhizosphere bacteria affected M. incognita juvenile vitality in vitro.
- Taxon
- plantsViridiplantaee0
- Interactor
- M. incognitaMeloidogyne incognitae0pathogen
- Outcome
- vitality of second-stage juveniles of M. incognitae0
- Value
- 1%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“About 1% of more than 5,000 bacteria isolated from rhizospheres of different plants produced detectable compounds that affected the vitality of second-stage juveniles of M. incognita in an in vitro test.”
Claim · model-written summary
Twenty percent of selected bacteria reduced cucumber galls after seed treatment.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- seed treatmente0
- Interactor
- M. incognitaMeloidogyne incognitae1pathogen
- Outcome
- number of gallse0
- Direction
- reducede0
- Value
- Twenty percente0
- Setting
- soil-free pouch systeme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twenty percent of these subsequently reduced the number of galls on cucumber in a soil-free pouch system when applied as a seed treatment.”
e1“juveniles of M. incognita”
Claim · model-written summary
Bacteria-treated soil yielded fewer galls on white clover.
- Taxon
- White clover
Trifolium repense0 - Treatment
- bacteria-treated soile0
- Interactor
- M. incognitaMeloidogyne incognitae0pathogen
- Outcome
- gallse0
- Direction
- fewere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected strains were applied as a drench to nonsterile soil infested with M. incognita. White clover plants growing in bacteria-treated soil had fewer galls and larger root systems.”
Claim · model-written summary
Bacteria-treated soil yielded larger white clover root systems.
- Taxon
- White cloverTrifolium repense0
- Treatment
- bacteria-treated soile0
- Interactor
- M. incognitaMeloidogyne incognitae1pathogen
- Outcome
- root systemse0
- Direction
- largere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“White clover plants growing in bacteria-treated soil had fewer galls and larger root systems.”
e1“infested with M. incognita”
Claim · model-written summary
Bacterial treatment significantly increased white clover top weight versus untreated control.
- Taxon
- White cloverTrifolium repense1
- Outcome
- plant tope0
- Direction
- greatere0
- Comparator
- nontreated controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both plant top and root weights were significantly greater compared with the nontreated control”
e1“White clover plants”
Claim · model-written summary
Bacterial treatment significantly increased white clover root weight versus untreated control.
- Taxon
- White cloverTrifolium repense1
- Treatment
- bacteria-treated soile2
- Outcome
- root weightse0
- Direction
- greatere0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both plant top and root weights were significantly greater compared with the nontreated control”
e1“White clover plants”
e2“bacteria-treated soil”
The same questions in other papers
seed treatment · Meloidogyne incognita · Cucumis sativus (cucumber)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.