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During spontaneous food/beverage fermentations, the microbiota associated with the raw material has a considerable importance: this microbial consortium evolves in reason of the nutrient content and of the physical, chemical, and biological determinants present in the food matrix, shaping fermentation dynamics with significant impacts on the ‘qualities’ of final productions. The selection from the indigenous micro-biodiversity of ‘virtuous’ ecotypes that coupled pro-technological and biotechnological aptitudes provide the basis for the formulation of ‘tailored’ starter cultures. In the fermenting food and beverage arena, the wine sector is generally characterized by the generation of a high added value. Together with a pronounced seasonality, this feature strongly contributes to the selection of a large group of starter cultures. In the last years, several studies contributed to describe the complexity of grapevine-associated microbiota using both culture-dependent and culture-independent approaches. The grape-associated microbial communities continuously change during the wine-making process, with different dominances that correspond to the main biotechnological steps that take place in wine. In order to simplify, following a time trend, four major dominances can be mainly considered: non-Saccharomyces, Saccharomyces, lactic acid bacteria (LAB), and spoilage microbes. The first two dominances come in succession during the alcoholic fermentation: the impact of Saccharomyces (that are responsible of key enological step of ethanol production) can be complemented/integrated by the contributions of compatible non-Saccharomyces strains. Lactic acid bacteria constitute the malolactic consortium responsible of malolactic fermentation, a microbial bioconversion often desired in wine (especially in red wine production). Finally, the fourth dominance, the undesired microbiota, represents a panel of microorganisms that, coupling spoilage potential to the resistance to the harsh conditions typical of wine environment, can cause important economic losses. In each of these four dominances a complex microbial biodiversity has been described. The studies on the enological significance of the micro-biodiversity connected with each of the four dominances highlighted the presence of a dichotomy: in each consortia there are species/strains that, in reason of their metabolisms, are able to improve wine ‘qualities’ (resource of interest in starter cultures design), and species/strains that with their metabolism are responsible of depreciation of wine. Articles describing new oenological impacts of yeasts and bacteria belonging to the four main categories above mentioned (non-Saccharomyces, Saccharomycetes, lactic acid bacteria, and spoilage microbes) are welcome. Moreover, in this Research Topic, we encourage mini-review submissions on topics of immediate interest in wine microbiology that link microbial biodiversity with positive/negative effects in wine.

Wine --- Yeasts --- Microbial Diversity --- Bacteria --- Safety --- alcoholic fermentation --- malolactic fermentation --- grapes --- quality

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Yeast - Industrial Applications is a book that covers applications and utilities of yeasts in food, chemical, energy, and environmental industries collected in 12 chapters. The use of yeasts in the production of metabolites, enzymatic applications, fermented foods, microorganism controls, bioethanol production, and bioremediation of contaminated environments is covered showing results, methodologies, and processes and describing the specific role of yeasts in them. The traditional yeast Saccharomyces cerevisiae is complemented in many applications with the use of less known non-Saccharomyces yeasts that now are being used extensively in industry. This book compiles the experience and know-how of researchers and professors from international universities and research centers.

Yeast. --- Nematospora --- Yeasts --- Edible fungi --- Leavening agents --- Yeast-free diet --- Life Sciences --- Food Technology --- Agricultural and Biological Sciences --- Bromatology

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This book offers a broad understanding of several ways in which yeasts can be applied to the biotechnology industry. The seven chapters are grouped into three sections (apart from the ""Introduction"" section). The Animal Nutrition section comprises two chapters dealing with the utilization of yeast as a probiotic for animal nutrition. The Food Industry section addresses the utilization of yeast in food products. Finally, the Industrial Bioproducts section deals with the development of new yeast platforms as cell factories for biochemical production.

Yeast --- Biotechnology. --- Industrial applications. --- Chemical engineering --- Genetic engineering --- Nematospora --- Yeasts --- Edible fungi --- Leavening agents --- Yeast-free diet --- Life Sciences --- Biotechnology --- Immunology and Microbiology --- Applied Microbiology

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Biotechnology including medical applications depends on the yeast as biofermenter to produce many industrial products including pharmaceutical ones. Although yeasts are first known as useful microorganisms, some of them are identified as pathogens for plants, animals, and humans. Due to the simple cellular structure of the yeast among other microbial groups, it is used in the earliest investigations to determine the features of eukaryotic molecular biology, cell biology, and physiology. The economic income of some countries mainly depends on yeast for producing the economic products, such as France that depends on yeast for wine production. This book throws light on yeast and its important role in the medical applications.

Chemistry, Technical. --- Yeast. --- Nematospora --- Yeasts --- Edible fungi --- Leavening agents --- Yeast-free diet --- Chemical technology --- Industrial chemistry --- Technical chemistry --- Chemistry --- Technology --- Chemical engineering --- Life Sciences --- Food Technology --- Agricultural and Biological Sciences --- Bromatology

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From the beginning of this century, non-Saccharomyces yeasts have taken increased relevance in wine processing. Several biotechnological companies now produce non-Saccharomyces yeasts at an industrial level to improve aroma or flavor, stabilize wine, produce biological acidification, or conversely metabolize malic acid. Species like Torulaspora delbrueckii, Metschnikowia pulcherrima, Kloeckera apiculata, Lachancea thermotolerans, Schizosaccharomyces pombe, and several others are common due to the technological applications they have in sensory quality but also in wine ageing and stabilization. Moreover, spoilage non-Saccharomyces yeasts like Brettanomyces bruxellensis, Saccharomycodes ludwigii, and Zygosacharomyces bailii are becoming important because of the alterations they are able to produce in high-quality wines. New strategies to control these defective yeasts have been developed to control them without affecting sensory quality. The knowledge of the physiology, ecology, biochemistry, and metabolomics of these yeasts can help to better use them in controlling traditional problems such as low fermentative power, excessive volatile acidity, low implantation under enological conditions, and sensibility to antimicrobial compounds like sulfites traditionally used in wine processing. This Special Issue intends to compile current research and revised information on non-Saccharomyces yeasts with enological applications to facilitate the use and the understanding of this biotechnological tool. In 1 year this SI has globally more than 15kdownloads and produced more than 30 citations.

n/a --- wine acidity --- pulcherrimin --- glycosidases --- Lactobacillus plantarum --- Saccharomycodes ludwigii --- sparkling wine --- processing foods --- non-Saccharomyces --- taxonomy --- Candida stellate --- wine quality --- Candida stellata --- non-Saccharomyces yeast --- Brettanomyces bruxellensis --- flavor complexity --- Schizosaccharomyces pombe --- Wickerhamomyces anomalus --- Stermerella bacillaris --- mixed cultures fermentation --- oenological uses --- winemaking --- re-fermentation --- Zygosaccharomyces rouxii --- Torulaspora delbrueckii --- genetic improvement --- Zygotorulaspora florentina --- maloalcoholic fermentation --- high-ethanol --- mixed starters --- yeast --- wines --- non-Saccharomyces yeasts --- aroma compounds --- spoilage yeasts’ control --- metabolism --- acetate esters --- Pichia anomala --- wine --- sequential fermentations --- spoilage-control --- enzymes --- yeast dominance --- acidification --- ageing-on-lees --- Kluyveromyces thermotolerans --- co-fermentation --- biotechnological applications --- stable pigments --- ecology --- Pichia kudriavzevii --- Lachancea thermotolerans --- Metschnikowia pulcherrima --- biocontrol --- S. ludwigii --- Candida intermedia --- nitrogen --- yeast inoculation --- volatile acidity --- off-flavors --- malolactic bacteria --- wine safety --- genome --- Aureobasidium pullulans --- viticulture --- anthocyanin --- aroma --- antimicrobial peptides --- spoilage yeasts' control