Compositional Shifts in the Mycobiota of ‘Shine Muscat’ Grape (Vitis labruscana Baily × V. vinifera L.) Bunches During Cold Storage at Different Temperatures
2025
Wei Li | Linjun Xie | Yongmei Zhou | Xian Ji | Haijun Wang | Liting Pang | Feicui Liang | Guo Cheng | Jin Zhang
The cultivation of &lsquo:Shine Muscat&rsquo: grapes is rapidly expanding in East Asia due to their desirable qualities and muscat flavor. Studies have revealed that storing these grapes at an controlled freezing-point temperature diminishes their muscat flavor, whereas storage at 10 °:C preserves it. However, the impact of a higher storage temperature on the evolution of microbial communities remains unclear. This study aimed to analyze the mycobiota dynamics of &lsquo:Shine Muscat&rsquo: grape bunches under different cold storage temperatures. A total of 1,892,842 and 1,643,200 sequences were obtained from berries and pedicels, identifying over 208 fungal genera from 6 phyla. Xylariaceae was the most abundant family, with a prevalence between 7.21% and 69.27% across all sample groups. The primary genera included Zygosporium, Cladosporium, Aspergillus, Acremonium, Podosordaria, Zasmidium, Penicillium, and Alternaria. Spoilage-related fungi varied with storage temperature, with Aspergillus, Penicillium, and Alternaria being dominant at 0 °:C and Cladosporium, Aspergillus, Penicillium, and Alternaria being prevalent at 10 °:C. The fungal profiles of berries and pedicels differed significantly, and storage temperature further influenced these variations. Our findings highlight distinct fungal diversity and spoilage patterns in &lsquo:Shine Muscat&rsquo: grape bunches from the Nanning region compared to those grown in temperate areas, revealing the unique microbial evolution of grape bunches stored at different temperatures in Nanning.
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