13,700
edits
Changes
m
no edit summary
''Pichia'' is a genus of yeasts in the family Saccharomycetaceae with spherical, elliptical, or oblong cells. ''Pichia'' is a teleomorph, and forms hat-shaped, hemispherical, or round ascospores during reproduction. The anamorphs of some ''Pichia'' species are ''Candida'' species. The asexual reproduction is by multilateral budding. ''Pichia'' can be prolific pellicle-forming yeasts. <ref name="Pichia wiki">[https://en.wikipedia.org/wiki/Pichia . Wikipedia, Obtained 8/1/17]</ref> Many species of ''Pichia'' have been to biotransform monoterpenes found in hop oils (see [[Hops#Hop_Derived_Compounds_In_Beer_and_Biotransformations|Hop Biotransformations]]).
Some species of ''Pichia'' can produce exopolysaccharides (EPS), which are extracellular (produced and expelled outside of the cell) polymers of monosaccharides connected by glycosidic bonds with a degree of polymerization higher than 10. EPS assists in producing biofilms for microorganisms. It is possible that EPS from yeast could make beer "ropy" or "sick", similar to [[Pediococcus]] <ref name="Gientka_2015" /><ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2465980936763439/ Zach taggartTaggart. Milk the Funk Facebook group post on EPS from yeast. 01/16/2019.]</ref>.
[[File:Pichiakpellicle.jpg|thumb|Pichia kudriavzevii pellicle; photo by Dr Matt Bochman [https://www.facebook.com/539527212902201/photos/a.686127604908827.1073741828.539527212902201/686127568242164/?type=1&theater ].]]