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通过病毒宏基因组学探索发酵蔬菜中的病毒多样性。

Exploring viral diversity in fermented vegetables through viral metagenomics.

作者信息

Cantuti Gendre Julia, Le Marrec Claire, Chaillou Stéphane, Omhover-Fougy Lysiane, Landaud Sophie, Dugat-Bony Eric

机构信息

UMR 0782 SAYFOOD, Université Paris-Saclay, INRAE, AgroParisTech, 22 place de l'agronomie, 91120, Palaiseau, France.

UMR 1366 OENOLOGIE, Université Bordeaux, INRAE, Bordeaux INP, Bordeaux Sciences Agro, Institut des Sciences de la Vigne et du Vin, 210 Chemin de Leysotte, 33140, Villenave-d'Ornon, France.

出版信息

Food Microbiol. 2025 Jun;128:104733. doi: 10.1016/j.fm.2025.104733. Epub 2025 Jan 17.


DOI:10.1016/j.fm.2025.104733
PMID:39952771
Abstract

Fermented vegetables are traditionally produced using the endogenous microorganisms present in raw ingredients. While the diversity of bacteria and fungi in fermented vegetables has been relatively well studied, phage communities remain largely unexplored. In this study, we collected twelve samples of fermented cabbage, carrot, and turnip after fermentation and analyzed the microbial and viral communities using shotgun and viral metagenomic approaches. Assessment of the viral diversity also benefited from epifluorescence microscopy to estimate viral load. The viral metagenomics approach targeted dsDNA, ssDNA, and RNA viruses. The microbiome of fermented vegetables was dominated by lactic acid bacteria and varied according to the type of vegetable used as raw material. The analysis of metagenome-assembled-genomes allowed the detection of 22 prophages of which 8 were present as free particles and therefore detected in the metaviromes. The viral community, estimated to range from 5.28 to 7.57 log virus-like particles per gram of fermented vegetables depending on the sample, was mainly composed of dsDNA viruses, although ssDNA and non-bacterial RNA viruses, possibly originating from the phyllosphere, were also detected. The dsDNA viral community, primarily comprising bacteriophages, varied depending on the type of vegetable used for fermentation. The bacterial hosts predicted for these phages mainly belonged to Lactobacillaceae and Enterobacteriaceae families. These results highlighted the complex microbial and viral composition of fermented vegetables, which varied depending on the three types of vegetables used as raw material. Further research is needed to deepen our understanding of the impact of these viruses on the microbial ecology of fermented vegetables and on the quality of the final products.

摘要

传统上,发酵蔬菜是利用原料中存在的内生微生物生产的。虽然发酵蔬菜中细菌和真菌的多样性已经得到了相对充分的研究,但噬菌体群落仍 largely 未被探索。在本研究中,我们在发酵后收集了12份发酵卷心菜、胡萝卜和芜菁样本,并使用鸟枪法和病毒宏基因组学方法分析了微生物和病毒群落。病毒多样性的评估还受益于落射荧光显微镜来估计病毒载量。病毒宏基因组学方法针对双链DNA、单链DNA和RNA病毒。发酵蔬菜的微生物群以乳酸菌为主,并根据用作原料的蔬菜类型而有所不同。宏基因组组装基因组的分析使得能够检测到22个前噬菌体,其中8个以游离颗粒形式存在,因此在病毒宏基因组中被检测到。根据样本不同,每克发酵蔬菜中的病毒群落估计在5.28至7.57 log病毒样颗粒之间,主要由双链DNA病毒组成,不过也检测到了可能源自叶际的单链DNA和非细菌RNA病毒。双链DNA病毒群落主要由噬菌体组成,根据用于发酵的蔬菜类型而有所不同。预测这些噬菌体的细菌宿主主要属于乳杆菌科和肠杆菌科。这些结果突出了发酵蔬菜复杂的微生物和病毒组成,其因用作原料的三种蔬菜类型而异。需要进一步研究以加深我们对这些病毒对发酵蔬菜微生物生态和最终产品质量影响的理解。

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