By organism › Oomycetes › Pythiaceae › Pythium

Observationobservedreview summarybasis n/a

Claim · model-written summary

No canonical RxLR effectors are confirmed in Pythium species.

Taxon: Pythium speciesPythiume0
Gene: RxLR effectorse0
Outcome: no confirmed canonical RxLR effectorse0

Verbatim

e0
“Pythium species predominantly deploy necrosis-inducing NLPs and cell wall-degrading enzymes, with no confirmed canonical RxLR effectors”
✓ located verbatim in the source · abstract, characters 594–729

Title

Molecular Interactions Between Soil-Borne Oomycetes and Plants: Infection Mechanisms, Host Resistance, and Implications for Sustainable Agriculture

Usama Amin; Maryam Shabbir; Danjie Long; et al. Plants 2026. doi:10.3390/plants15030416

Other claims from this paper (3)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Pythium species were more virulent.

Taxon: PythiumPythiume0
Outcome: virulente0
Direction: moree0

Verbatim

e0
“Species of Pythium were more virulent”
✓ located verbatim in the source · abstract, characters 1091–1128

Title

Oomycete communities in lowland tropical forest soils vary in species abundance and comprise saprophytes and pathogens of seeds and seedlings of multiple plant species

Kirk D. Broders; Hernan D. Capador‐Barreto; Gloria Iriarte; et al. American Journal of Botany 2024. doi:10.1002/ajb2.16425

Other claims from this paper (7)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Pythium spp. made up 10.4% of the oomycete community abundance (51 ASVs).

Taxon: Pythium spp.Pythiume0
Outcome: abundancee0
Value: 10.4%e0
Qualifier: 51 ASVe0

Verbatim

e0
“abundance, 203 ASV) and Pythium spp. (10.4%, 51 ASV)”
✓ located verbatim in the source · abstract, characters 856–908

Title

Long-Term Tillage and Crop Rotation Regimes Reshape Soil-Borne Oomycete Communities in Soybean, Corn, and Wheat Production Systems

Alison Claire Gahagan; Yichao Shi; Devon Radford; et al. Plants 2023. doi:10.3390/plants12122338

Other claims from this paper (7)

Observation Metabarcoding of post-harvest soil oomycete communities over 2016-2018 found 292 amplicon sequence variants.
Observation The oomycete community was dominated by Globisporangium spp. at 85.1% in abundance (203 ASVs).
Intervention effect No till decreased oomycete diversity and community compositional structure heterogeneity compared with conventional tillage.
Intervention effect Crop rotation affected the oomycete community structure only under conventional tillage.
Intervention effect Tillage and rotation had interaction effects on most oomycete species.
Intervention effect Soybean seedling vitality, representing soil and crop health, was lowest in soils under conventional tillage cultivating soybean or corn.
Intervention effect The grain yield of the three crops responded differently to tillage and crop rotation regimes.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Trichoderma isolates had significant antagonist activity against Pythium.

Taxon: Pythium sp.Pythiume0
Treatment: isolates of Trichoderma sp.e0
Interactor: Pythium sp.Pythiume0pathogen
Second interactor: Trichoderma sp.Trichodermae0biocontrol_agent
Outcome: antagonist activitye0

Not reportedComparatorDirection

Verbatim

e0
“Significant antagonist activity was recorded for isolates of Trichoderma sp. against Pythium sp. and Diplodia sp.”
✓ located verbatim in the source · abstract, characters 1366–1479

Title

Diversity of fungal communities in the soil of three nurseries in Tlemcen (North-West of Algeria)

Hadjer Smahi; Zineb Riahi; Rawane Soumicha Tebbal; et al. Genetics and Biodiversity Journal 2022. doi:10.46325/gabj.v6i2.219

Other claims from this paper (5)

Observation Three Phytophthora species were isolated and identified after baiting with fresh ornamental leaves.
Observation The dilution method revealed significant fungal biodiversity on PDA medium.
Observation Twelve fungal species were isolated and identified.
Observation Five oomycetes were isolated and identified.
Intervention effect Trichoderma isolates had significant antagonist activity against Diplodia.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

On tebuconazole-amended media, Pythium was still able to grow.

Taxon: PythiumPythiume0
Treatment: tebuconazole-amended mediae0
Interactor: PythiumPythiume0pathogen
Outcome: growe0
Direction: allowinge0

Not reportedComparator

Verbatim

e0
“Bioassay tests on tebuconazole-amended media showed that tebuconazole can suppress soil fungi while allowing Pythium to grow”
✓ located verbatim in the source · abstract, characters 834–958

Title

Factors Underlying the Prevalence of Pythium Infection of Corn Seeds Following Seed Treatment Application of Tebuconazole

Xiujun Tang; Shuning Chen; Xiaojing Yan; et al. Plant Disease 2021. doi:10.1094/pdis-07-21-1586-re

Other claims from this paper (5)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Two Pythium-like strains were isolated from lettuce roots and stems.

Taxon: PythiumPythiume0
Organ / stage: roots and stemse0
Outcome: strains were isolatede0
Value: Twoe0

Verbatim

e0
“Two Pythium-like strains were isolated from the roots and stems.”
✓ located verbatim in the source · abstract, characters 699–763

Title

First Report of Pythium aphanidermatum Causing Root Rot of Head Lettuce in China

J. S. Qi; B. Zhang; L. G. Ma; et al. Plant Disease 2021. doi:10.1094/pdis-09-20-1875-pdn

Other claims from this paper (14)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

All screened isolates were sensitive to mefenoxam.

Taxon: PythiumPythiumt0
Treatment: mefenoxame0
Outcome: sensitivee0

Not reportedComparatorDirection

Verbatim

e0
“All isolates were sensitive to mefenoxam and propamocarb, but these same isolates were insensitive to oxathiapiprolin, except those classified taxonomically in Pythium clade I.”
✓ located verbatim in the source · abstract, characters 1161–1337

t0
“Pythium”
✓ located verbatim in the source · title, characters 19–26

Title

Characterization ofPythiumSpecies Collected from a Multiple Time-Point Sampling of Cucurbits in South Carolina

Sean M. Toporek; Anthony P. Keinath Plant Disease 2020. doi:10.1094/pdis-04-20-0728-re

Other claims from this paper (13)

Observation P. spinosum comprised 45.6% of isolates.
Observation P. myriotylum comprised 20.0% of isolates.
Observation P. irregulare comprised 15.3% of isolates.
Observation P. aphanidermatum comprised 12.8% of isolates.
Observation P. myriotylum was predominantly isolated in May, July and September.
Observation P. aphanidermatum was predominantly isolated in May, July and September.
Observation P. spinosum was predominantly isolated in November and March.
Observation P. irregulare was predominantly isolated in November and March.
Observation P. ultimum was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Observation P. irregulare was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Observation P. spinosum was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Intervention effect All screened isolates were sensitive to propamocarb.
Intervention effect Screened isolates were insensitive to oxathiapiprolin except Pythium clade I.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

All screened isolates were sensitive to propamocarb.

Taxon: PythiumPythiumt0
Treatment: propamocarbe0
Outcome: sensitivee0

Not reportedComparatorDirection

Verbatim

e0
“All isolates were sensitive to mefenoxam and propamocarb, but these same isolates were insensitive to oxathiapiprolin, except those classified taxonomically in Pythium clade I.”
✓ located verbatim in the source · abstract, characters 1161–1337

t0
“Pythium”
✓ located verbatim in the source · title, characters 19–26

Title

Characterization ofPythiumSpecies Collected from a Multiple Time-Point Sampling of Cucurbits in South Carolina

Sean M. Toporek; Anthony P. Keinath Plant Disease 2020. doi:10.1094/pdis-04-20-0728-re

Other claims from this paper (13)

Observation P. spinosum comprised 45.6% of isolates.
Observation P. myriotylum comprised 20.0% of isolates.
Observation P. irregulare comprised 15.3% of isolates.
Observation P. aphanidermatum comprised 12.8% of isolates.
Observation P. myriotylum was predominantly isolated in May, July and September.
Observation P. aphanidermatum was predominantly isolated in May, July and September.
Observation P. spinosum was predominantly isolated in November and March.
Observation P. irregulare was predominantly isolated in November and March.
Observation P. ultimum was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Observation P. irregulare was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Observation P. spinosum was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Intervention effect All screened isolates were sensitive to mefenoxam.
Intervention effect Screened isolates were insensitive to oxathiapiprolin except Pythium clade I.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Screened isolates were insensitive to oxathiapiprolin except Pythium clade I.

Taxon: PythiumPythiume0
Treatment: oxathiapiproline0
Outcome: insensitivee0
Qualifier: except those classified taxonomically in Pythium clade Ie0

Not reportedComparatorDirection

Verbatim

e0
“All isolates were sensitive to mefenoxam and propamocarb, but these same isolates were insensitive to oxathiapiprolin, except those classified taxonomically in Pythium clade I.”
✓ located verbatim in the source · abstract, characters 1161–1337

Title

Characterization ofPythiumSpecies Collected from a Multiple Time-Point Sampling of Cucurbits in South Carolina

Sean M. Toporek; Anthony P. Keinath Plant Disease 2020. doi:10.1094/pdis-04-20-0728-re

Other claims from this paper (13)

Observation P. spinosum comprised 45.6% of isolates.
Observation P. myriotylum comprised 20.0% of isolates.
Observation P. irregulare comprised 15.3% of isolates.
Observation P. aphanidermatum comprised 12.8% of isolates.
Observation P. myriotylum was predominantly isolated in May, July and September.
Observation P. aphanidermatum was predominantly isolated in May, July and September.
Observation P. spinosum was predominantly isolated in November and March.
Observation P. irregulare was predominantly isolated in November and March.
Observation P. ultimum was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Observation P. irregulare was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Observation P. spinosum was more virulent than P. myriotylum and P. aphanidermatum at 25°C.
Intervention effect All screened isolates were sensitive to mefenoxam.
Intervention effect All screened isolates were sensitive to propamocarb.

Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

The authors suggest A. terreus glucanase affects Pythium glucan cell walls.

Taxon: PythiumPythiume0
Interactor: A. terreusAspergillus terreuse0biocontrol_agent
Gene: glucanase enzymee0
Outcome: cell walls of Pythiume0

Verbatim

e0
“This suggests that the cell walls of Pythium, which consist of glucan, are affected by the glucanase enzyme produced by A. terreus.”
✓ located verbatim in the source · abstract, characters 675–806

Title

Aspergillus terreus Inhibits Growth and Induces Morphological Abnormalities in Pythium aphanidermatum and Suppresses Pythium-Induced Damping-Off of Cucumber

Boshra A. Halo; Rashid A. Al-Yahyai; Abdullah M. Al-Sadi Frontiers in Microbiology 2018. doi:10.3389/fmicb.2018.00095

Other claims from this paper (10)

Intervention effect The two A. terreus isolates inhibited P. aphanidermatum growth in culture.
Observation P. aphanidermatum hyphae near the inhibition zone showed abnormal growth and loss of internal content.
Intervention effect A. terreus culture filtrate significantly increased cellular leakage from P. aphanidermatum mycelium.
Observation Both A. terreus isolates showed significantly increased glucanase activity.
Observation Aspergillus isolates produced siderephore.
Mechanism Siderephore is suggested to contribute to inhibition of Pythium growth.
Intervention effect Culture filtrates of 65P and 9F significantly reduced P. aphanidermatum spore production relative to control.
Intervention effect A. terreus biocontrol increased cucumber seedling survival to 38-39%, versus 10-20% with P. aphanidermatum alone.
Observation Cucumber seedlings treated only with A. terreus 65P and 9F showed no disease symptoms.
Intervention effect A. terreus isolates had no negative effects on cucumber seedling growth.

Pythium 43 claims

43 claims