Abstract
Streptomyces hygroscopicus var. geldanus controlled rhizoctonia root rot of pea in previously sterilized soil if incubated for 2 or more days prior to infesting soil with Rhizoctonia solani and planting. Streptomyces hygroscopicus also reduced saprophytic growth and the population of R. solani in soil. Growth of R. solani was inhibited by geldanamycin, an antibiotic produced by S. hygroscopicus, on nutrient media. Methanol extracts of soils in which the antagonist was incubated for 2 or more days inhibited growth of R. solani. Geldanamycin concentration was 88 μg per gram of soil after 7 days of incubation. Bioautography of soil extracts indicated that the inhibitory compounds were geldanamycin and two other compounds, also found in the geldanamycin standard. The period of incubation necessary for antibiotic production and disease control was similar, with no disease control occurring where no antibiotic was detected. Amending soil with geldanamycin, in amounts equivalent to that produced after 2 or 7 days of incubation, controlled disease and reduced saprophytic growth of the pathogen. Lesser amounts of the antibiotic did neither. No evidence for antagonism owing to competition (nitrogen, carbon) or parasitism was found. Streptomyces hygroscopicus and geldanamycin also affected plant growth.
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Claims 14
Claim · model-written summary
Preincubated Streptomyces controlled rhizoctonia root rot of pea in sterilized soil.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- Streptomyces hygroscopicus var. geldanuse0
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie0pathogen - Second interactor
- Streptomyces hygroscopicus var. geldanusStreptomyces geldanamycininuse0biocontrol_agent
- Outcome
- rhizoctonia root rot of peae0
- Direction
- controllede0
- Qualifier
- 2 or more dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Streptomyces hygroscopicus var. geldanus controlled rhizoctonia root rot of pea in previously sterilized soil if incubated for 2 or more days prior to infesting soil with Rhizoctonia solani and planting”
Claim · model-written summary
Streptomyces reduced soil saprophytic growth of R. solani.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Streptomyces hygroscopicuse1
- Interactor
- R. solaniRhizoctonia solanie1pathogen
- Second interactor
- Streptomyces hygroscopicus
Streptomyces hygroscopicuse1biocontrol_agent - Outcome
- saprophytic growthe1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Streptomyces hygroscopicus also reduced saprophytic growth and the population of R. solani in soil”
Claim · model-written summary
Streptomyces reduced soil populations of R. solani.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Streptomyces hygroscopicuse1
- Interactor
- R. solaniRhizoctonia solanie1pathogen
- Second interactor
- Streptomyces hygroscopicusStreptomyces hygroscopicuse1biocontrol_agent
- Outcome
- population of R. solanie1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Streptomyces hygroscopicus also reduced saprophytic growth and the population of R. solani in soil”
Claim · model-written summary
Geldanamycin inhibited R. solani growth on nutrient media.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- geldanamycine1
- Interactor
- R. solaniRhizoctonia solanie1pathogen
- Outcome
- Growth of R. solanie1
- Direction
- inhibitede1
- Setting
- nutrient mediae1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Growth of R. solani was inhibited by geldanamycin, an antibiotic produced by S. hygroscopicus, on nutrient media”
Claim · model-written summary
Extracts of soils preincubated with the antagonist inhibited R. solani growth.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Methanol extracts of soilse1
- Interactor
- R. solaniRhizoctonia solanie1pathogen
- Outcome
- growth of R. solanie1
- Direction
- inhibitede1
- Qualifier
- 2 or more dayse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Methanol extracts of soils in which the antagonist was incubated for 2 or more days inhibited growth of R. solani”
Claim · model-written summary
Soil geldanamycin reached 88 μg per gram after seven days of incubation.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- Geldanamycin concentratione1
- Value
- 88 μg per gram of soile1
- Qualifier
- 7 days of incubatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Geldanamycin concentration was 88 μg per gram of soil after 7 days of incubation”
Claim · model-written summary
Bioautography identified geldanamycin and two additional compounds in inhibitory soil extracts.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- inhibitory compounds were geldanamycin and two other compoundse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Bioautography of soil extracts indicated that the inhibitory compounds were geldanamycin and two other compounds, also found in the geldanamycin standard”
Claim · model-written summary
Antibiotic production and disease control required similar incubation periods, and no control occurred without detected antibiotic.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- antibiotic productione1
- Outcome
- disease controle1
- Qualifier
- no antibiotic was detectede1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“The period of incubation necessary for antibiotic production and disease control was similar, with no disease control occurring where no antibiotic was detected”
Claim · model-written summary
Soil amended with effective amounts of geldanamycin controlled disease.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Amending soil with geldanamycine1
- Outcome
- diseasee1
- Direction
- controllede1
- Qualifier
- amounts equivalent to that produced after 2 or 7 days of incubatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Amending soil with geldanamycin, in amounts equivalent to that produced after 2 or 7 days of incubation, controlled disease and reduced saprophytic growth of the pathogen”
Claim · model-written summary
Soil geldanamycin amendment reduced saprophytic growth of the pathogen.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Amending soil with geldanamycine1
- Outcome
- saprophytic growth of the pathogene1
- Direction
- reducede1
- Qualifier
- amounts equivalent to that produced after 2 or 7 days of incubatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Amending soil with geldanamycin, in amounts equivalent to that produced after 2 or 7 days of incubation, controlled disease and reduced saprophytic growth of the pathogen”
Claim · model-written summary
Lesser geldanamycin amounts did not control disease or reduce pathogen saprophytic growth.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Lesser amounts of the antibiotice1
- Outcome
- disease and reduced saprophytic growth of the pathogene2
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Lesser amounts of the antibiotic did neither”
e2“controlled disease and reduced saprophytic growth of the pathogen. Lesser amounts of the antibiotic did neither”
Claim · model-written summary
No evidence supported nutrient competition or parasitism as antagonistic mechanisms.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- No evidence for antagonism owing to competition (nitrogen, carbon) or parasitism was founde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“No evidence for antagonism owing to competition (nitrogen, carbon) or parasitism was found”
Claim · model-written summary
Streptomyces hygroscopicus affected pea growth.
- Taxon
- peaLathyrus oleraceuse0
- Interactor
- Streptomyces hygroscopicusStreptomyces hygroscopicuse1biocontrol_agent
- Outcome
- plant growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Streptomyces hygroscopicus and geldanamycin also affected plant growth”
Claim · model-written summary
Geldanamycin affected pea growth.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- geldanamycine1
- Outcome
- plant growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea”
e1“Streptomyces hygroscopicus and geldanamycin also affected plant growth”
The same questions in other papers
Streptomyces hygroscopicus · Rhizoctonia solani · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- positive
antimicrobial agent · growth · Lathyrus oleraceus (pea)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
botanical · Rhizoctonia solani · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- 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.