Foods (Apr 2024)

Inhibitory Effect and Potential Antagonistic Mechanism of Isolated Epiphytic Yeasts against <i>Botrytis cinerea</i> and <i>Alternaria alternata</i> in Postharvest Blueberry Fruits

  • Jia Li,
  • Ting Yang,
  • Furong Yuan,
  • Xinyue Lv,
  • Yahan Zhou

DOI
https://doi.org/10.3390/foods13091334
Journal volume & issue
Vol. 13, no. 9
p. 1334

Abstract

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This study evaluated the biocontrol effect of isolated epiphytic yeasts (Papiliotrema terrestris, Hanseniaspora uvarum, and Rhodosporidium glutinis) against Botrytis cinerea and Alternaria alternata in blueberry fruits and its possible mechanisms. Our findings indicated that the three tested yeasts exerted a good biocontrol effect on postharvest diseases in blueberry, and that H. uvarum was the most effective. In addition, the three tested yeasts could improve the postharvest storage quality of blueberry fruits to some extent. H. uvarum demonstrated the strongest direct inhibitory effect on pathogens by suppressing spore germination, mycelial growth, and antifungal volatile organic compound (VOC) production. P. terrestris showed the highest extracellular lytic enzymes activities. It also had better adaptation to low temperature in fruit wounds at 4 °C. The biofilm formation capacity was suggested to be the main action mechanism of R. glutinis, which rapidly colonized fruit wounds at 20 °C. Several action mechanisms are employed by the superb biocontrol yeasts, while yeast strains possess distinctive characteristics and have substantially different action mechanisms.

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