Metschnikowia sirindhorniae f.a., sp. nov. and Moniliella princeps sp. nov., Two Novel Yeasts Species Isolated from Toddy Palm (Borassus flabellifer L.) Inflorescence Sap in Thailand

Authors

  • Sasitorn Jindamorakot National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, THAILAND
  • Somjit Am-In National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, THAILAND
  • Rungluk Kaewwichian Microbiology Program, Department of Science, Faculty of Science and Technology, Bansomdejchaopraya Rajabhat University, Bangkok 10600, THAILAND
  • Pannida Khunnamwong Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, THAILAND
  • Savitree Limtong Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, THAILAND: The Academy of Science, The Royal Society of Thailand, Bangkok 10300, THAILAND

DOI:

https://doi.org/10.58837/tnh.25.8.267713

Keywords:

Metschnikowia sirindhorniae f.s., sp. nov., Moniliella princeps sp. nov., novel yeast species, Thailand

Abstract

Two strains, YSP-519 and YSP-478, respectively representing novel ascomycetous and basidiomycetous yeast species, were obtained from toddy palm inflorescence sap collected in Thailand. The ascomycetous yeast strain YSP-519 was closely related to Metschnikowia agaves CBS 7744T. There were 1.6% nucleotide substitutions (9 nucleotide substitutions and 2 gaps out of 555 nt) in the D1/D2 domains of the LSU rRNA gene and 0.7% nucleotide substitutions (3 nucleotide substitutions out of 454 nt) in the ITS regions. The basidiomycetous yeast strain YSP-478 was closely related to Moniliella pollinis CBS 461.67T. It had 0.5 % nucleotide substitutions (3 nucleotide substitutions out of 554 nt) in the D1/D2 domains of the LSU rRNA gene and 2.0% nucleotide substitutions (9 nucleotide substitutions out of 473 nt) in the ITS regions. Phylogenetic analysis based on the concatenated sequences of the ITS regions and the D1/D2 domains confirmed that the two strains represent two new species. The name Metschnikowia sirindhorniae f.a., sp. nov. is proposed for YSP-519T), and Moniliella princeps sp. nov. is proposed for YSP-478T. The holotypes of M. sirindhorniae and Mo. princeps are TBRC 10642T and TBRC 10641T, respectively and the ex-type are CGMCC 2.6079T and CGMCC 2.6078T, respectively. The MycoBank numbers of M. sirindhorniae and Mo. princeps are MB858878 and MB858879, respectively.

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Published

2025-11-17

How to Cite

[1]
Jindamorakot, S., Am-In, S. , Kaewwichian, R., Khunnamwong, P. and Limtong, S. 2025. Metschnikowia sirindhorniae f.a., sp. nov. and Moniliella princeps sp. nov., Two Novel Yeasts Species Isolated from Toddy Palm (Borassus flabellifer L.) Inflorescence Sap in Thailand. Tropical Natural History. 25, 8 (Nov. 2025), 439–448. DOI:https://doi.org/10.58837/tnh.25.8.267713.

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