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Past, present and future research directions with Pichia anomala
Department of Microbiology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.ORCID iD: 0000-0002-2059-9044
Department of Microbiology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.
Department of Microbiology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.
2011 (English)In: Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology, ISSN 0003-6072, E-ISSN 1572-9699, Vol. 99, no 1, 121-125 p.Article in journal (Refereed) Published
Abstract [en]

The first International Pichia anomala Symposium provided a survey of past, recent and ongoing research on this yeast. The research community working with this yeast has focussed on several areas. Based on molecular data, a revision of the taxonomy is required: the name P. anomala is no longer applicable, as the genus Pichia is polyphyletic. The current debate centres on whether the yeast should be designated as Wickerhamomyces anomalus or if the previous name, Hansenula anomala, should be re-instated. The anti-microbial activities of this yeast received considerable attention during the symposium. H. anomala has been extensively studied as a biopreservation agent in many different post-harvest systems. Several mechanisms account for its anti-microbial activities, including the production of killer proteins and toxic volatile metabolites. Anti-idiotypic antibodies generating an "internal image" of a killer protein have been found to possess therapeutic activity against a broad range of microorganisms. A great diversity of H. anomala strains was reported at the symposium. Strains have been isolated from several food and feed systems and even from the intestine and reproductive organs of a malaria vector (Anopheles stephensi). Feed and food supplemented with certain H. anomala strains show an improved quality due, for example, to the addition of advantageous proteins and phytase activity. However, a number of apparent opportunistic pathogenic strains have also been isolated. Strain differentiation, especially the recognition of potentially pathogenic isolates, is an important challenge for the future commercialisation of this yeast. Future industrial and agricultural application of this yeast also raises questions of the economics of large-scale production, its survival during storage (formulation) and of safety regulations, all of which require further investigation.

Place, publisher, year, edition, pages
Dordrecht, Netherlands: Springer, 2011. Vol. 99, no 1, 121-125 p.
Keyword [en]
Pichia anomala, Hansenula, Wickerhamomyces, Killer protein, Biocontrol, Phytase, Ethyl acetate, Opportunistic pathogen
National Category
Microbiology
Identifiers
URN: urn:nbn:se:oru:diva-52274DOI: 10.1007/s10482-010-9508-3ISI: 000286463200015PubMedID: 20924674ScopusID: 2-s2.0-79451471304OAI: oai:DiVA.org:oru-52274DiVA: diva2:971486
Available from: 2016-09-16 Created: 2016-09-16 Last updated: 2016-09-16Bibliographically approved

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