Articles
Unveiling the impact of postharvest treatment with Aureobasidium sp. isolate TCY70 on the microbiome of citrus fruit
Article number
1451_35
Pages
241 – 248
Language
English
Abstract
The yeast-like fungus Aureobasidium sp. shows great potential for controlling postharvest diseases of fruits.
Our preliminary data have shown that Aureobasidium sp.
TCY70 effectively reduces the incidence of postharvest diseases in citrus fruits.
In this study, we investigated the variation in the microbiome on the epiphytic surface of citrus fruit during storage following the application of Aureobasidium sp.
TCY70. Our results revealed a significant shift in fungal diversity compared to bacterial diversity in the microbiota after treatment with TCY70. In the treatment group, Aureobasidium sp. was enriched, while Cladosporium sp., Aspergillus sp., and Penicillium sp. were depleted compared to the control group.
After one month of storage, the relative abundance of Aureobasidium sp. was maintained in the treatment group at 24.4%, down from 36.7%, while Penicillium sp. was present in a lower proportion (5.5%) in the TCY70-treated group compared to the control group (18.9%). Additionally, the significantly lower Shannon index values in the treated samples indicate reduced richness and diversity post-treatment.
These findings suggest that the application of Aureobasidium sp.
TCY70 could survive on the surface of citrus and inhibit the growth of postharvest pathogens, giving Aureobasidium sp. a competitive advantage within the fungal microbiota.
Interestingly, there was no observable effect on bacterial microbiota after treatment with TCY70. These results show that the mechanism for Aureobasidium sp.
TCY70s effectiveness in managing postharvest diseases of citrus is by suppression of other fungal populations.
Our preliminary data have shown that Aureobasidium sp.
TCY70 effectively reduces the incidence of postharvest diseases in citrus fruits.
In this study, we investigated the variation in the microbiome on the epiphytic surface of citrus fruit during storage following the application of Aureobasidium sp.
TCY70. Our results revealed a significant shift in fungal diversity compared to bacterial diversity in the microbiota after treatment with TCY70. In the treatment group, Aureobasidium sp. was enriched, while Cladosporium sp., Aspergillus sp., and Penicillium sp. were depleted compared to the control group.
After one month of storage, the relative abundance of Aureobasidium sp. was maintained in the treatment group at 24.4%, down from 36.7%, while Penicillium sp. was present in a lower proportion (5.5%) in the TCY70-treated group compared to the control group (18.9%). Additionally, the significantly lower Shannon index values in the treated samples indicate reduced richness and diversity post-treatment.
These findings suggest that the application of Aureobasidium sp.
TCY70 could survive on the surface of citrus and inhibit the growth of postharvest pathogens, giving Aureobasidium sp. a competitive advantage within the fungal microbiota.
Interestingly, there was no observable effect on bacterial microbiota after treatment with TCY70. These results show that the mechanism for Aureobasidium sp.
TCY70s effectiveness in managing postharvest diseases of citrus is by suppression of other fungal populations.
Authors
P.-H. Lo, Y.-C. Huang, Y.-T. Lai
Keywords
Aureobasidium sp., microbiome, citrus, Penicillium sp., alpha diversity, beta diversity, Shannon index
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