First report of Pythium deliense causing root and crown rot on Catharanthus roseus in Thailand

Intaparn, Phikul; Noireung, Parinn; Maumoon, R.; McGovern, Robert J.; Unartngam, Jintana; Tapingkae, Tanya; To-anun, Chaiwat

doi:10.5943/ppq/9/1/21

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…2 and 3, Table 4). P. deliense infected or colonized a wide range of plants and soil samples in Japan (Watanabe, 1981) and Thailand (Intaparn et al, 2019). Some species in this clade were waterborne or aquatic species (Nam and Choi, 2019).…”

Section: Clade Amentioning

confidence: 99%

Morphological and phylogenetic diversity of Pythium and related genera (Pythiaceae, Pythiales) from some areas in eastern Thailand

2022

ANRES

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Importance of the work: Pythium and related genera in the class Oomycetes are an important microorganism group that affects environmental stability due to their diverse lifestyle patterns. However, full information on their distribution is limited in Thailand. Objectives: To describe their oomycetes distribution in Chanthaburi, Rayong, and Trat provinces, eastern Thailand and provide their diversity and phylogenetic data. Materials & Methods: Composite soils samples were collected July-September 2019. Three techniques (soil baiting, soil dilution and soil plating) were used for isolation. Isolated oomycetes species were obtained from different locations (mangrove forest, natural forest, cultivated field and a river). The isolates were characterized using combined data of morphological traits and sequences analysis of the internal transcribed spacer region (ITS). Results: In total, 52 oomycetes were isolated and assigned to 11 species (Globisporangium carolinianum, Globisporangium splendens, Pythium acanthicum, Pythium deliense, Pythium diclinum, Pythium longipapillum, Pythium myriotylum, Pythium torulosum, Phytopythium cucurbitacearum, Phytopythium helicoides and Phytopythium vexans). Phylogenetic trees of the ITS region analysis indicated that the species obtained from the various locations in this investigation shared a similar biological trait of Pythium and related genera within clades A, B, D, I and K. Main finding: This was the first report of P. longipapillum recovery in Thailand and perhaps the first publication of this species in Thailand and Southeast Asia. Identification and descriptions of Pythium and related genera were provided, as well as useful information to understand their distribution in Thailand's unique ecosystem.

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Section: Clade Amentioning

confidence: 99%

Morphological and phylogenetic diversity of Pythium and related genera (Pythiaceae, Pythiales) from some areas in eastern Thailand

2022

ANRES

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Identification and Characterization of Pythium deliense Causing Sugar Beet (Beta vulgaris) Root Rot in Grand Forks, North Dakota

Bhuiyan,

Lakhsman,

del Rio Mendoza

et al. 2024

Plant Health Progress

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Damping-off disease caused by multiple species of soilborne pathogens causes severe economic losses to sugar beet production. Thus, identifying the causal agent is important to formulating effective disease management. During a July 2021disease survey in a sugar beet field at Grand Forks, North Dakota, we observed that approximately 15% of plants located in low areas of a commercial field showed wilting leaves that were pale green and slightly blight in color, and the roots were dark brown to black along with irregular necrotic lesions. The isolated pathogen had the characteristic morphology of Pythium deliense. The sequence of the internal transcribed spacer (ITS) region and the cytochrome c oxidase subunit 1 mitochondrial (cox1) genes were 100% homologous with corresponding sequences in the NCBI database confirmed its P. deliense identity. Moreover, the ITS phylogeny confirmed its identity as P. deliense, and its close relationship with P. aphanidermatum. A disease screening trial with four sugar beet varieties was done. Growers and breeders could benefit from information about accurate sugar beet pathogen in a given field to formulate effective disease management practices.

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First report of Pythium deliense causing root and crown rot on Catharanthus roseus in Thailand

Cited by 2 publications

References 2 publications

Morphological and phylogenetic diversity of Pythium and related genera (Pythiaceae, Pythiales) from some areas in eastern Thailand

Morphological and phylogenetic diversity of Pythium and related genera (Pythiaceae, Pythiales) from some areas in eastern Thailand

Identification and Characterization of Pythium deliense Causing Sugar Beet (Beta vulgaris) Root Rot in Grand Forks, North Dakota

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