title: Monitoring the mycobiota during Greco di Tufo and Aglianico wine fermentation by 18S rRNA gene sequencing.
abstract: Spontaneous alcoholic fermentation of grape must is a complex process, carried out by indigenous yeast populations arising from the vineyard or the winery environment and therefore representing an autochthonous microbial terroir of the production area. Microbial diversity at species and biotype level is extremely important in order to develop the composite and typical flavour profile of DOCG (Appellation of Controlled and Guaranteed Origin) wines. In this study, we monitored fungal populations involved in spontaneous fermentations of Aglianico and Greco di Tufo grape must by high-throughput sequencing (HTS) of 18S rRNA gene amplicons. We firstly proposed an alternative/addition to ITS as target gene in HTS studies and highlighted consistency between the culture-dependent and -independent approaches. A complex mycobiota was found at the beginning of the fermentation, mainly characterized by non-Saccharomyces yeasts and several moulds, with differences between the two types of grapes. Moreover, Interdelta patterns revealed a succession of several Saccharomyces cerevisiae biotypes and a high genetic diversity within this species.
authors.affiliation: Department of Agricultural Sciences, Division of Microbiology, University of Naples Federico II, Via Università 100, 80055 Portici, Italy. Electronic address: francesca.defilippis@unina.it.
authors.forename: Francesca
authors.initials: F
authors.lastname: De Filippis
authors.affiliation: Department of Agricultural Sciences, Division of Microbiology, University of Naples Federico II, Via Università 100, 80055 Portici, Italy.
authors.forename: Antonietta
authors.initials: A
authors.lastname: La Storia
authors.affiliation: Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Blaiotta
mesh_terms: D005285:Fermentation; D005516:Food Microbiology; D005658:Fungi / Q000235:genetics; D020459:Genes, rRNA; D014644:Genetic Variation; D059014:High-Throughput Nucleotide Sequencing; D007218:Industrial Microbiology; D000072761:Mycobiome / Q000235:genetics; D016533:Mycological Typing Techniques; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D012441:Saccharomyces cerevisiae; D027843:Vitis / Q000382:microbiology; D014920:Wine / Q000382:microbiology*
chemical_list: D012337:RNA, Ribosomal, 18S
keywords: 18S rRNA gene sequencing; Grape must; High-throughput sequencing; Spontaneous fermentation; Winery mycobiota