Morphological Characterization and Phylogeny of Pythiumand Related Genera in Rayong Province, Thailand
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Creator Prommart Koohakan
Title Morphological Characterization and Phylogeny of Pythiumand Related Genera in Rayong Province, Thailand
Contributor Rattasit Saelee and Kanungnid Busarakam
Publisher King Mongkut's Institute of Technology Ladkrabang
Publication Year 2564
Journal Title Current Applied Science and Technology
Journal Vol. 21
Journal No. 1
Page no. 132-153
Keyword Oomycetes, identification, phylogeny, Rayong Province, Pythium
URL Website https://www.tci-thaijo.org/index.php/cast
Website title https://www.tci-thaijo.org/index.php
ISSN 2586-9396
Abstract Most well-known microorganisms in the class Oomycetes(notably genera Phytophthoraand Pythium) arepathogenicto both animals and plants due to their diverse lifestyle patterns. This study was designed to recoverPythiumfrom composite soils (cultivated and forest soils) and water sources (fresh and brackish water) from Rayong Province. Twenty isolates of hyalineand non-septate fungal-like organismswere isolated from those sources. The primer pair ITS4 and ITS6were used to amplifyapproximately 900 bp products from Internal transcribed spacer (ITS) region and morphological characteristicsincluding sporangium,oogonium, antheridium and oospore, were noted. Morphologicalcharacteristicsdata of recovered Pythiumstrain can be classifiedinto 12 source groups. ITS sequencing results revealed that eight closely related species had beenrecovered:Globisporangium splendens, Pythium cucurbitacearum, Pythium acanthichum, Pythium deliense, Pythium diclinum, Pythium torulosum, Phytopythiumvexansand Phytopythiumhelicoides,which had similarities in the range 94.67-100% values at between 656 and 922 locations. Most of these species were reported as plant pathogens. Therefore, this report can be used as a guide for disease control planning.
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