Wickerhamomyces | |
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Genus: | Wickerhamomyces Kurtzman, Robnett & Bas.-Powers, 2008 [1] |
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Wickerhamomyces canadensis Kurtzman, Robnett & Basehoar-Powers | |
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Wickerhamomyces is a genus of fungi within the Saccharomycetales order. It is placed within the family of Phaffomycetaceae. [2]
The fungi has asexual reproduction and that budding is multilateral on a narrow base. The cells are spherical, ovoid, or elongate in shape. Pseudohyphae and true hyphae (a long, branching, filamentous structure) are produced by some species. In sexual reproduction, it is found that the asci (spore bearing cell) may be unconjugated or show conjugation between a cell and its bud or between independent cells. Some species are heterothallic (species have sexes that reside in different individuals). Asci may be persistent or deliquescent and form one to four ascospores that may be hat-shaped or spherical with an equatorial ledge. [1]
The genus name of Wickerhamomyces is in honour of Lynferd J. Wickerham (1910-1990), who was an American botanist and taxonomist, who worked at the National Center for Agricultural Utilization Research. [3] In 1970, Wickerham had authored 'Genus 14. Pachysolen Boidin et Adzet, pp. 448–454. In J. Lodder (ed.), The Yeasts. A taxonomic study, 2nd ed. North-Holland Publishing Co., Amsterdam.'
The genus was circumscribed by Cletus P. Kurtzman, Christie J. Robnett and Eleanor Basehoar-Powers in FEMS Yeast Res. vol.8 (Issue 6) on page 951 in 2008. [1]
Some genera have been re-assigned from Pichia family; such as W. canadensis, W. ciferri, W. lynferdii, W. salvicola and W. subpelliculosa. [4]
Wickerhamomyces is very divergent, and the three basal species; W. hampshirensis, W. pijperi and W. strasburgensis may be shown by future studies to be members of a sister genus. [1]
Yeasts belonging to the genera Candida , Pichia , and Wickerhamomyces have been found in Aedes and Anopheles genera of mosquitoes. Wickerhamomyces anomalus has also been isolated from the gonads of mosquitoes. [5] It can then be used as a Glucanase to control the spread of plasmodium infection in malaria mosquitoes. [6]
Wickerhamomyces anomalus has also been found in budbod (a Philippine rice cake, also known as marcha in India) and found in various other Asian countries. [7] Such as Nepal and Tibet, where these alcoholic beverages (called Chhaang) are generated using a traditional starter called murcha. Murcha is prepared by using yeast and mold flora of wild herbs in cereal flours. [8]
It has also been used as a biocontrol agent to prevent fungal contamination of grains and produce. [5] Wickerhamomyces anomalus yeast is also used during the early stages of alcoholic fermentation, adding significantly to the character and quality of the wine. [9] It helps in the sensory aroma of lily rice wine. [10]
Wickerhamomyces silvicola has been found in the gum of the wild black cherry tree ( Prunus serotina ) and W. subpelliculosus in cucumber brine. [11] Wickerhamomyces strasburgensis is found as slime flux on the Douglas fir. [12] W. sylviae have been found in yeasts isolated from inside migratory birds, although it is unclear if the bird ate an insect that (then) contained the fungus. [13]
The yeast is used in the fermentation of decoction of Saraca asoca bark to develop a suitable method for preparing its polyherbal formulation, of Asokarista. This is an Ayurvedic herbal medicine used to treat ‘female disorders’ or for menstrual disorder and female hormonal imbalances. [14]
Beer is an alcoholic beverage produced by the brewing and fermentation of starches from cereal grain—most commonly malted barley, although wheat, maize (corn), rice, and oats are also used. The grain is mashed to convert starch in the grain to sugars, which dissolve in water to form wort. Fermentation of the wort by yeast produces ethanol and carbonation in the beer. Beer is one of the oldest alcoholic drinks in the world, the most widely consumed, and the third most popular drink after water and tea. Most modern beer is brewed with hops, which add bitterness and other flavours and act as a natural preservative and stabilising agent. Other flavouring agents, such as gruit, herbs, or fruits, may be included or used instead of hops. In commercial brewing, natural carbonation is often replaced with forced carbonation.
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Mead, also called honey wine, and hydromel, is an alcoholic beverage made by fermenting honey mixed with water, and sometimes with added ingredients such as fruits, spices, grains, or hops. The alcoholic content ranges from about 3.5% ABV to more than 20%. Possibly the most ancient alcoholic drink, the defining characteristic of mead is that the majority of the beverage's fermentable sugar is derived from honey. It may be still, carbonated, or naturally sparkling, and despite a common misconception that mead is exclusively sweet, it can also be dry or semi-sweet.
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Chhaang or chhyang is a Nepalese and Tibetan alcoholic beverage popular in parts of the eastern Himalayas among the Yakkha, Limbu, Dura, Newar, Sunuwar, Rai, Bhutia, Gurung, Magar, Sherpa, Tamang, Tharus and Lepcha communities. Among the Lepcha, it is called Chi. It is also known as jaarh in Nepal.
A ferment is a fermentation starter used in indirect methods of bread making. It may also be called mother dough.
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Pichia is a genus of yeasts in the family Pichiaceae with spherical, elliptical, or oblong acuminate cells. Pichia is a teleomorph, and forms hat-shaped, hemispherical, or round ascospores during sexual reproduction. The anamorphs of some Pichia species are Candida species. The asexual reproduction is by multilateral budding.
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Starmerella is a genus of fungi within the Saccharomycetales order. The relationship of this taxon to other taxa within the order is unknown, and it has not yet been placed with certainty into any family. Although, the GBIF list the family as Phaffomycetaceae. Several members of the Starmerella clade are associated with flowers and flower-visiting insects like bees and bumblebees; these yeasts cope well with high sugar niches. Many strains (species) of the Starmerella clade, including Starmerella bombicola and Candida apicola are known to produce sophorolipids which are carbohydrate-based, amphiphilic biosurfactants.
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Ogataea is a genus of ascomycetous yeasts in the family Saccharomycetaceae. It was separated from the former genus Hansenula via an examination of their 18S and 26S rRNA partial base sequencings by Yamada et al. 1994.
The Wickerhamomycetaceae are a family of yeasts in the order Saccharomycetales that reproduce by budding. Species in the family have a widespread distribution.
Hanseniaspora opuntiae is a species of yeast in the family Saccharomycetaceae. It has been isolated from locations worldwide, on grape berries and on prickly pear cacti.
Ramesh Chandra Ray is an agriculture and food microbiologist, author, and editor. He is the former Principal Scientist (Microbiology), and Head of the Regional Centre at Indian Council of Agricultural Research ICAR - Central Tuber Crops Research Institute in Bhubaneswar, India.
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