Abstract
Parasitism of macroconidia and endoconidial chlamydospores of Fusarium culmorum by Pythium oligandrum was studied on water agar (WA), corn‐meal agar (CMA) and glass slides. Loss of cytoplasmic content in F. culmorum spores was followed by complete degradation, and P. oligandrum produced an abundance of oogonia on the parasitized macroconidia. A simple method for assessing the relative aggressiveness of isolates is presented, based on the percentage of macroconidial cells devoid of cytoplasm. Parasitism of macroconidia by P. acanthophoron , P. oligandrum and P. periplocum , but not by the plant pathogenic species, P. tracheiphilum , was demonstrated by this method. Interactions between hyphae of P. oligandrum and F. culmorum on WA resulted in an increase in the number of oogonia of P. oligandrum and a decrease in the sporulation of F. culmorum . The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test.
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Claims 8
Claim · model-written summary
Loss of cytoplasm in F. culmorum spores is followed by their complete degradation by P. oligandrum.
- Taxon
- barley
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Hordeum vulgaree7 - Interactor
- F. culmorum
.jpg?width=60)
Fusarium culmorume2pathogen - Second interactor
- Pythium oligandrum
Pythium oligandrume1biocontrol_agent - Outcome
- complete degradatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e1“Parasitism of macroconidia and endoconidial chlamydospores of Fusarium culmorum by Pythium oligandrum was studied”
e2“Loss of cytoplasmic content in F. culmorum spores was followed by complete degradation, and P. oligandrum produced an abundance of oogonia on the parasitized macroconidia”
Claim · model-written summary
P. oligandrum produces an abundance of oogonia on parasitised F. culmorum macroconidia.
- Taxon
- barleyHordeum vulgaree7
- Interactor
- P. oligandrumPythium oligandrume2biocontrol_agent
- Second interactor
- F. culmorumFusarium culmorume2pathogen
- Outcome
- abundance of oogonia on the parasitized macroconidiae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e2“Loss of cytoplasmic content in F. culmorum spores was followed by complete degradation, and P. oligandrum produced an abundance of oogonia on the parasitized macroconidia”
Claim · model-written summary
P. acanthophoron, P. oligandrum and P. periplocum parasitise F. culmorum macroconidia.
- Taxon
- barleyHordeum vulgaree7
- Interactor
- P. acanthophoron , P. oligandrum and P. periplocumPythium oligandrumPythium periplocumGlobisporangium acanthophorone3biocontrol_agent
- Second interactor
- Fusarium culmorumFusarium culmorume1pathogen
- Outcome
- Parasitism of macroconidiae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e1“Parasitism of macroconidia and endoconidial chlamydospores of Fusarium culmorum by Pythium oligandrum was studied”
e3“Parasitism of macroconidia by P. acanthophoron , P. oligandrum and P. periplocum , but not by the plant pathogenic species, P. tracheiphilum , was demonstrated by this method”
Claim · model-written summary
P. tracheiphilum, a plant pathogenic Pythium species, does not parasitise F. culmorum macroconidia.
- Taxon
- barleyHordeum vulgaree7
- Interactor
- P. tracheiphilumPythium tracheiphilume3pathogen
- Outcome
- Parasitism of macroconidiae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e3“Parasitism of macroconidia by P. acanthophoron , P. oligandrum and P. periplocum , but not by the plant pathogenic species, P. tracheiphilum , was demonstrated by this method”
Claim · model-written summary
A simple method based on the percentage of macroconidial cells without cytoplasm assesses relative isolate aggressiveness.
- Taxon
- barleyHordeum vulgaree7
- Outcome
- relative aggressiveness of isolatese4
- Value
- percentage of macroconidial cells devoid of cytoplasme4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e4“A simple method for assessing the relative aggressiveness of isolates is presented, based on the percentage of macroconidial cells devoid of cytoplasm”
Claim · model-written summary
Hyphal interactions between P. oligandrum and F. culmorum increase the number of P. oligandrum oogonia.
- Taxon
- barleyHordeum vulgaree7
- Treatment
- Interactions between hyphae of P. oligandrum and F. culmorum on WAe5
- Interactor
- P. oligandrumPythium oligandrume5biocontrol_agent
- Second interactor
- F. culmorumFusarium culmorume5pathogen
- Outcome
- number of oogonia of P. oligandrume5
- Direction
- increasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e5“Interactions between hyphae of P. oligandrum and F. culmorum on WA resulted in an increase in the number of oogonia of P. oligandrum and a decrease in the sporulation of F. culmorum”
Claim · model-written summary
Hyphal interactions between P. oligandrum and F. culmorum decrease F. culmorum sporulation.
- Taxon
- barleyHordeum vulgaree7
- Treatment
- Interactions between hyphae of P. oligandrum and F. culmorum on WAe5
- Interactor
- F. culmorumFusarium culmorume5pathogen
- Outcome
- sporulation of F. culmorume5
- Direction
- decreasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
e5“Interactions between hyphae of P. oligandrum and F. culmorum on WA resulted in an increase in the number of oogonia of P. oligandrum and a decrease in the sporulation of F. culmorum”
Claim · model-written summary
Isolates of four Pythium species suppress F. culmorum disease symptoms on barley seedlings in a greenhouse test.
- Taxon
- barleyHordeum vulgaree7
- Treatment
- isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticume7
- Interactor
- F. culmorumFusarium culmorume7pathogen
- Second interactor
- P. oligandrumPythium oligandrume7biocontrol_agent
- Outcome
- disease symptomse7
- Direction
- suppresse7
- Setting
- greenhouse teste7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The ability of isolates of P. oligandrum , P. periplocum , P. acanthophoron and P. mycoparasiticum to suppress disease symptoms caused by F. culmorum on barley seedlings was demonstrated in a greenhouse test”
The same questions in other papers
Fusarium culmorum · disease · Hordeum vulgare (barley)Positive and negative results
4 in the opposite direction
- negative
- no effect
- negative
1 paper more in this group
See all 5 papers →Pythium oligandrum · disease · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- positive
Pythium oligandrum · Fusarium culmorum · Hordeum vulgare (barley)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.