Phenotypic and molecular diversity of Meyerozyma guilliermondii strains isolated from food and other environmental niches, hints for an incipient speciation

Food Microbiology
Laura CorteGianluigi Cardinali

Abstract

Meyerozyma guilliermondii is a yeast species widely isolated from several natural environments and from fruit; in medical microbiology it is known as the teleomorph of the opportunistic pathogen Candida guilliermondii, which causes about 2% of the human blood infections. This yeast is also promising in a variety of biotechnological applications as vitamins production and post-harvest control. The question if isolates from different sources are physiologically and genetically similar, or if the various environments induced significant differences, is crucial for the understanding of this species structure and to select strains appropriate for each application. This question was addressed using LSU and ITS sequencing for taxonomic assignment, i-SSR (GACA4) for the molecular characterization and FTIR for the metabolomic fingerprint. All data showed that fruit and environmental isolates cluster separately with a general good agreement between metabolomics and molecular analysis. An additional RAPD analysis was able to discriminate strains according to the isolation position within the pineapple fruit. Although all strains are members of the M. guilliermondii species according to the current standards, the distribution of large vari...Continue Reading

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Citations

Oct 20, 2015·International Journal of Food Microbiology·Petra WrentMaría-Isabel de Silóniz
Oct 28, 2019·Microorganisms·Clara Vida G C CarneiroJoão R M Almeida
Dec 5, 2019·Anais Da Academia Brasileira De Ciências·Mauricio Ramírez-CastrillónEsteban Osorio-Cadavid
Mar 20, 2018·Infectious Diseases and Therapy·Luca RosciniGianluigi Cardinali

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