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The treasure trove of yeast genera and species described by Johannes van der Walt (1925-2011).

Smith MT, Groenewald M - IMA Fungus (2012)

Bottom Line: Amongst these was Johannes P. van der Walt, who had a major role in shaping our current understanding of yeast biodiversity and taxonomy.Van der Walt based his taxonomic studies not only on available cultures, but also by going into the field to isolate yeasts from various substrates.This contribution provides a comprehensive overview of the current nomenclatural and taxonomic status of the yeast genera and species introduced by van der Walt during his career.

View Article: PubMed Central - PubMed

Affiliation: CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands;

ABSTRACT
Yeast taxonomy and systematics have in recent years been dealt with intensively primarily by a small group of individual researchers with particular expertise. Amongst these was Johannes P. van der Walt, who had a major role in shaping our current understanding of yeast biodiversity and taxonomy. Van der Walt based his taxonomic studies not only on available cultures, but also by going into the field to isolate yeasts from various substrates. This pioneering work led to the discovery of many new genera and species, which were deposited in the Centraalbureau voor Schimmelcultures (CBS) collections for future studies in taxonomy, genomics, and industrial uses. These treasures collected during more than 60 years provide an outstanding legacy to the yeast community and will continue to exist in his absence. This contribution provides a comprehensive overview of the current nomenclatural and taxonomic status of the yeast genera and species introduced by van der Walt during his career.

No MeSH data available.


Related in: MedlinePlus

Asci with ascospores of Kluyveromyces polysporus (Vanderwaltozyma polyspora) After Barnett et al. (2000). A. YM agar, 16 d. B. McClary acetate agar, 2 weeks. Bar = 5 μm.
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Figure 1: Asci with ascospores of Kluyveromyces polysporus (Vanderwaltozyma polyspora) After Barnett et al. (2000). A. YM agar, 16 d. B. McClary acetate agar, 2 weeks. Bar = 5 μm.

Mentions: In the early years of taxonomy, a group of scientist that included Johannes van der Walt, Nico van Uden and Herman J. Phaff (Fig. 1), as well as Lynford J. Wickerham, made a huge contribution by using phenotypic characteristics of morphology and physiology for the description of novel genera and species. At that time, these features were considered as important for generic assignment and species distinction. One relevant practical contribution for species characterization was the introduction of the Diazonium Blue B (DBB) test by van der Walt & Hopsu-Havu (1976). In cases where the sexual cycle of a yeast was unknown, this DBB test could be used by yeast taxonomists to determine whether the yeast had an ascomycetous or basidiomycetous affinity. Basidiomycetous yeasts gave a dark red colour reaction when the DBB solution was applied, while this reaction was absent in ascomycetous yeasts.


The treasure trove of yeast genera and species described by Johannes van der Walt (1925-2011).

Smith MT, Groenewald M - IMA Fungus (2012)

Asci with ascospores of Kluyveromyces polysporus (Vanderwaltozyma polyspora) After Barnett et al. (2000). A. YM agar, 16 d. B. McClary acetate agar, 2 weeks. Bar = 5 μm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3539321&req=5

Figure 1: Asci with ascospores of Kluyveromyces polysporus (Vanderwaltozyma polyspora) After Barnett et al. (2000). A. YM agar, 16 d. B. McClary acetate agar, 2 weeks. Bar = 5 μm.
Mentions: In the early years of taxonomy, a group of scientist that included Johannes van der Walt, Nico van Uden and Herman J. Phaff (Fig. 1), as well as Lynford J. Wickerham, made a huge contribution by using phenotypic characteristics of morphology and physiology for the description of novel genera and species. At that time, these features were considered as important for generic assignment and species distinction. One relevant practical contribution for species characterization was the introduction of the Diazonium Blue B (DBB) test by van der Walt & Hopsu-Havu (1976). In cases where the sexual cycle of a yeast was unknown, this DBB test could be used by yeast taxonomists to determine whether the yeast had an ascomycetous or basidiomycetous affinity. Basidiomycetous yeasts gave a dark red colour reaction when the DBB solution was applied, while this reaction was absent in ascomycetous yeasts.

Bottom Line: Amongst these was Johannes P. van der Walt, who had a major role in shaping our current understanding of yeast biodiversity and taxonomy.Van der Walt based his taxonomic studies not only on available cultures, but also by going into the field to isolate yeasts from various substrates.This contribution provides a comprehensive overview of the current nomenclatural and taxonomic status of the yeast genera and species introduced by van der Walt during his career.

View Article: PubMed Central - PubMed

Affiliation: CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands;

ABSTRACT
Yeast taxonomy and systematics have in recent years been dealt with intensively primarily by a small group of individual researchers with particular expertise. Amongst these was Johannes P. van der Walt, who had a major role in shaping our current understanding of yeast biodiversity and taxonomy. Van der Walt based his taxonomic studies not only on available cultures, but also by going into the field to isolate yeasts from various substrates. This pioneering work led to the discovery of many new genera and species, which were deposited in the Centraalbureau voor Schimmelcultures (CBS) collections for future studies in taxonomy, genomics, and industrial uses. These treasures collected during more than 60 years provide an outstanding legacy to the yeast community and will continue to exist in his absence. This contribution provides a comprehensive overview of the current nomenclatural and taxonomic status of the yeast genera and species introduced by van der Walt during his career.

No MeSH data available.


Related in: MedlinePlus