Abstract
Isolates of Pythium attributable to thirteen named species and to species group F (sensu van der Plaats‐Niterink) were isolated from roots of field‐grown rice seedlings showing poor root development and lack of vigour. P. arrhenomanes and group F were the most commonly isolated species. The roots of 15‐week‐old rice plants yielded only P. flevoense, P. vanterpoolii, P. rostratum and Pythium group G of which the latter two were not obtained from seedling roots. In pot tests with representative Pythium isolates, P. arrhenomanes was most pathogenic to rice seedlings, causing pre‐ and post‐emergence death and average reductions in shoot and root growth in surviving seedlings of 48 and 70%, respectively. P. irregulare killed seedlings before but not after emergence, whilst the response of rice seedlings to P. myriotylum apparently depended on the length and timing of a cold shock treatment. P. pyrilobum did not reduce seedling number or shoot growth but reduced root growth. P. vanterpoolii and group F were not pathogenic in the tests. P. coloratum, P. echinulatum, P. flevoense, P. oedochilum, P. oligandrum, P. periilum, P. pyrilobum and P. rostratum were isolated infrequently and had no adverse effects on seedlings in pathogenicity tests, although P. myriotylum, P. oligandrum , and P. periilum were associated with significant increases in shoot growth. P. tracheiphilum was isolated from one site but its pathogenicity was not tested. This is the first record of P. coloratum, P. echinulatum, P. flevoense, P. irregulare, P. oedochilum, P. oligandrum, P. periilum, P. pyrilobum and P. tracheiphilum from rice roots.
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 17
Claim · model-written summary
P. arrhenomanes and group F were most often isolated.
- Taxon
- rice
Oryza sativat0 - Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- most commonly isolated speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. arrhenomanes and group F were the most commonly isolated species.”
t0“rice”
Claim · model-written summary
Older rice roots yielded four Pythium taxa.
- Taxon
- riceOryza sativae0
- Interactor
- P. flevoensePythium flevoensee0pathogen
- Outcome
- yielded only P. flevoense, P. vanterpoolii, P. rostratum and Pythium group Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots of 15‐week‐old rice plants yielded only P. flevoense, P. vanterpoolii, P. rostratum and Pythium group G”
Claim · model-written summary
P. arrhenomanes was most pathogenic and caused seedling deaths before and after emergence.
- Taxon
- riceOryza sativae0
- Treatment
- P. arrhenomanese0
- Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- pre‐ and post‐emergence deathe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. arrhenomanes was most pathogenic to rice seedlings, causing pre‐ and post‐emergence death”
Claim · model-written summary
P. arrhenomanes reduced shoot growth by an average 48%.
- Taxon
- riceOryza sativae0
- Treatment
- P. arrhenomanese0
- Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- shoote0
- Direction
- reductionse0
- Value
- 48e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. arrhenomanes was most pathogenic to rice seedlings, causing pre‐ and post‐emergence death and average reductions in shoot and root growth in surviving seedlings of 48 and 70%, respectively.”
Claim · model-written summary
P. arrhenomanes reduced root growth by an average 70%.
- Taxon
- riceOryza sativae0
- Treatment
- P. arrhenomanese0
- Interactor
- P. arrhenomanesPythium arrhenomanese0pathogen
- Outcome
- root growthe0
- Direction
- reductionse0
- Value
- 70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. arrhenomanes was most pathogenic to rice seedlings, causing pre‐ and post‐emergence death and average reductions in shoot and root growth in surviving seedlings of 48 and 70%, respectively.”
Claim · model-written summary
P. irregulare killed seedlings before but not after emergence.
- Taxon
- riceOryza sativat0
- Treatment
- P. irregularee0
- Interactor
- P. irregulareGlobisporangium irregularee0pathogen
- Outcome
- killed seedlings before but not after emergencee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. irregulare killed seedlings before but not after emergence”
t0“rice”
Claim · model-written summary
Response to P. myriotylum apparently depended on cold shock timing and duration.
- Taxon
- riceOryza sativae0
- Interactor
- P. myriotylumPythium myriotylume0pathogen
- Outcome
- response of rice seedlings to P. myriotylume0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the response of rice seedlings to P. myriotylum apparently depended on the length and timing of a cold shock treatment.”
Claim · model-written summary
P. pyrilobum did not reduce seedling number or shoot growth.
- Taxon
- riceOryza sativat0
- Treatment
- P. pyrilobume0
- Interactor
- P. pyrilobumPythium pyrilobume0pathogen
- Outcome
- seedling number or shoot growthe0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. pyrilobum did not reduce seedling number or shoot growth”
t0“rice”
Claim · model-written summary
P. pyrilobum reduced root growth.
- Taxon
- riceOryza sativat0
- Treatment
- P. pyrilobume0
- Interactor
- P. pyrilobumPythium pyrilobume0pathogen
- Outcome
- root growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. pyrilobum did not reduce seedling number or shoot growth but reduced root growth.”
t0“rice”
Claim · model-written summary
P. vanterpoolii was not pathogenic.
- Taxon
- riceOryza sativat0
- Treatment
- P. vanterpooliie0
- Interactor
- P. vanterpooliiPythium vanterpooliie0pathogen
- Outcome
- not pathogenice0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. vanterpoolii and group F were not pathogenic in the tests.”
t0“rice”
Claim · model-written summary
Pythium group F was not pathogenic.
- Taxon
- riceOryza sativat0
- Treatment
- group Fe0
- Interactor
- group Fe0pathogen
- Outcome
- not pathogenice0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. vanterpoolii and group F were not pathogenic in the tests.”
t0“rice”
Claim · model-written summary
Several Pythium taxa were rare and showed no adverse seedling effects.
- Taxon
- riceOryza sativat0
- Interactor
- P. coloratumPythium coloratume0pathogen
- Outcome
- isolated infrequently and had no adverse effects on seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. coloratum, P. echinulatum, P. flevoense, P. oedochilum, P. oligandrum, P. periilum, P. pyrilobum and P. rostratum were isolated infrequently and had no adverse effects on seedlings in pathogenicity tests”
t0“rice”
Claim · model-written summary
P. myriotylum was associated with increased rice shoot growth.
- Taxon
- riceOryza sativat0
- Interactor
- P. myriotylumPythium myriotylume0pathogen
- Outcome
- shoot growthe0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. myriotylum, P. oligandrum , and P. periilum were associated with significant increases in shoot growth.”
t0“rice”
Claim · model-written summary
P. oligandrum was associated with increased rice shoot growth.
- Taxon
- riceOryza sativat0
- Interactor
- P. oligandrum
Pythium oligandrume0pathogen - Outcome
- shoot growthe0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. myriotylum, P. oligandrum , and P. periilum were associated with significant increases in shoot growth.”
t0“rice”
Claim · model-written summary
P. periilum was associated with increased rice shoot growth.
- Taxon
- riceOryza sativat0
- Interactor
- P. periilumPythium periilume0pathogen
- Outcome
- shoot growthe0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. myriotylum, P. oligandrum , and P. periilum were associated with significant increases in shoot growth.”
t0“rice”
Claim · model-written summary
P. tracheiphilum was found at one site but not tested for pathogenicity.
- Taxon
- riceOryza sativat0
- Interactor
- P. tracheiphilumPythium tracheiphilume0pathogen
- Outcome
- isolated from one sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. tracheiphilum was isolated from one site but its pathogenicity was not tested.”
t0“rice”
Claim · model-written summary
Nine Pythium taxa were first recorded from rice roots.
- Taxon
- riceOryza sativae0
- Interactor
- P. coloratumPythium coloratume0pathogen
- Outcome
- first record of P. coloratum, P. echinulatum, P. flevoense, P. irregulare, P. oedochilum, P. oligandrum, P. periilum, P. pyrilobum and P. tracheiphilum from rice rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This is the first record of P. coloratum, P. echinulatum, P. flevoense, P. irregulare, P. oedochilum, P. oligandrum, P. periilum, P. pyrilobum and P. tracheiphilum from rice roots.”
The same questions in other papers
Pythium arrhenomanes · growth · Oryza sativa (rice)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.