Claim · model-written summary
Pythium aphanidermatum was recovered only from inoculated roots and stem bases and reidentified by morphology and sequences.
- Taxon
- Pythium aphanidermatumPythium aphanidermatume0
- Outcome
- recovered only from the water-soaked roots and stem bases of inoculated plantse0
- Qualifier
- re-isolated cultures again identified based on morphological characteristics and sequencing of the ITS and COI genese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Verbatim
e0“Pythium aphanidermatum was recovered only from the water-soaked roots and stem bases of inoculated plants and the re-isolated cultures again identified based on morphological characteristics and sequencing of the ITS and COI genes.”
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)
- Observation Twenty percent of field head lettuce developed water-soaked root and stem-base lesions followed by death in July 2017.
- Observation Diseased lettuce first appeared in low-lying areas prone to water accumulation.
- Observation Two Pythium-like strains were isolated from lettuce roots and stems.
- Observation The isolates had white, dense cottony aerial branched mycelia and produced sporangia, oogonia, antheridia and oospores.
- Observation Sporangia were mostly lobate and oogonia were smooth, nearly globose and terminal.
- Observation Oospores were globose, smooth and aplerotic, while antheridia were broadly sac-shaped.
- Observation Oogonia dimensions ranged from 19.5 to 25.2 µm with average 23.1 µm.
- Observation Oospore dimensions ranged from 17.8 to 22.3 µm with average 19.9 µm.
- Observation Isolate morphology was consistent with P. aphanidermatum.
- Observation Both isolates had identical COI sequences and identical ITS sequences.
- Observation The COI sequence had 100% identity to a P. aphanidermatum reference.
- Observation The ITS sequence had 99% identity to a P. aphanidermatum reference.
- Intervention effect All twenty inoculated lettuce plants developed similar symptoms within one week, while controls remained symptomless.
- Observation This is reported as the first head lettuce root rot report caused by Pythium aphanidermatum.