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Researchers identified 16 yeast species from Amazonian fruits, with Candida tropicalis and Debaryomyces hansenii being most common. This expands knowledge of yeast biodiversity and potential biotechnological applications from the Amazon.

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Area of Science:

  • Microbiology
  • Mycology
  • Biotechnology

Background:

  • Yeasts on fruit surfaces are valuable for industrial applications like enzyme and flavor production.
  • The Amazon rainforest is a potential source of novel yeast species, but their presence on native fruits is largely unexplored.

Purpose of the Study:

  • To identify and characterize yeast species isolated from native Amazonian fruits.
  • To assess the diversity and potential biotechnological utility of these yeasts.

Main Methods:

  • Isolation of 81 yeast strains from 10 Amazonian fruit species.
  • Molecular identification using Rep-PCR, RFLP of the 5.8S-ITS region, and D1/D2 sequencing of the 26S rRNA gene.
  • Phenotypic characterization, including screening for hydrolase activities.

Main Results:

  • 16 yeast species were identified, belonging to genera such as Candida, Debaryomyces, and Hanseniaspora.
  • Candida tropicalis, Debaryomyces hansenii, Hanseniaspora opuntiae, and Hanseniaspora thailandica were the most dominant species.
  • Variable phenotypic profiles were observed; only one isolate showed lipolytic activity, while others lacked proteolytic, cellulolytic, and amylolytic capabilities.

Conclusions:

  • This study reveals the yeast diversity present on Amazonian native fruits.
  • The identified yeast strains offer potential for various biotechnological applications, broadening our understanding of microbial resources in the Amazon.