Analysis of the fungal population involved in Katsuobushi production.

J Gen Appl Microbiol

Education and Research Center for Fermentation Studies, Faculty of Agriculture, Kagoshima University.

Published: September 2020

AI Article Synopsis

  • The study investigates the fungal population involved in the traditional Japanese method of making dried bonito (Katsuobushi), revealing that the Aspergillus species are the main fungi during production.
  • Analysis using amplicon sequencing and culture methods identified three specific Aspergillus species: A. chevalieri, A. montevidensis, and A. sydowii, with A. chevalieri being the most prominent throughout the process.
  • The research provides insights into how these fungi contribute to Katsuobushi production, enhancing our understanding of traditional food practices.

Article Abstract

Naturally occurring fungi have been used in the traditional production of dried bonito, Katsuobushi, in Japan. In this study, we analyzed the fungal population present during Katsuobushi production. Amplicon sequence analysis of ITS1 indicated that Aspergillus spp. are predominant throughout the production process. In addition, culture-dependent analyzes identified three species Aspergillus chevalieri, Aspergillus montevidensis, and Aspergillus sydowii, based on sequencing of benA, caM, and rpb2 genes. A. chevalieri isolates were classified into teleomorphic and anamorphic strains based on morphological analysis. A. chevarieri was the dominant species throughout the production process, whereas A. montevidensis increased and A. sydowii decreased in abundance during Katsuobushi production. Our study will enhance the understanding of fungal species involved in traditional Katsuobushi production.

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Source
http://dx.doi.org/10.2323/jgam.2019.09.003DOI Listing

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