Bjerkandera

Bjerkandera is a genus of seven species of wood-rotting fungi in the family Meruliaceae.

Bjerkandera
Bjerkandera adusta
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Polyporales
Family:
Meruliaceae
Genus:
Bjerkandera

P.Karst. (1879)
Type species
Bjerkandera adusta
(Willd.) P.Karst. (1879)
Species

B. adusta
B. atroalba
B. centroamericana
B. fumosa
B. mikrofumosa
B. subsimulans
B. terebrans

Synonyms
  • Myriadoporus Peck (1884)

Taxonomy

The genus was circumscribed by Finnish mycologist Petter Adolf Karsten in 1879. The type species, B. adusta, was originally described as Boletus adustus by Carl Ludwig Willdenow in 1787.[1] The generic name honours Swedish naturalist Clas Bjerkander.[2] Karsten included seven species in addition to the type: B. dichroa, B. amorpha, B. fumosa, B. kymatodes, B. diffusa, and B. isabellina.[1] Most of those species have been since moved to different genera or synonymized.

In a 1913 survey of polypore genera, Adeline Ames included B. adusta, B. fumosa, and B. puberula;[3] the latter fungus is now placed in Abortiporus. Marinus Anton Donk included only B. adusta and B. fumosa in a 1974 publication.[4] Some authors have suggested to merge these two species into other genera, such as Gloeoporus, Tyromyces, or Grifola.[2] Molecular phylogenetic analysis has demonstrated that the two traditional Bjerkandera fungi form a monophyletic group that is sister to the crust fungus Terana coerulea.[5] The little-known Cuban species B. subsimulans and B. terebrans, both originally described by Miles Berkeley and Moses Ashley Curtis, were transferred to Bjerkandera by William Alphonso Murrill in 1907,[6] and are accepted as valid species by Index Fungorum. Bjerkandera atroalba and B. centroamericana are two neotropical species that were transferred to Bjerkandera, and described as new, respectively, in 2015.[7]

Description
Bjerkandera fumosa

The fruit bodies of Bjerkandera fungi have soft and pliable caps with an upper surface texture ranging from finely hairy to smooth. The pore surface on the undersurface of the cap ranges from grey to black or buff to greyish brown. The tubes are the same colour. A dark, denser zone is typically present between tubes and the context, which is usually white to buff.[8]

The hyphal system in Bjerkandera is monomitic, containing only generative hyphae. These hyphae have clamps, and are thin to thick-walled. Cystidia are absent from the hymenium. The spores of Bjerkandera are smooth with a short cylindrical shape, thin-walled, and do not react in Melzer's reagent.[8]

Habitat and distribution

Bjerkandera fungi usually grow on hardwoods, and are rarely on conifers. They cause a white rot.[8]

Species
  • Bjerkandera adusta (Willd.) P.Karst. (1879)
  • Bjerkandera atroalba (Rick) Westphalen & Tomšovský (2015)[7]
  • Bjerkandera centroamericana Kout, Westphalen & Tomšovský (2015)[7]
  • Bjerkandera fumosa (Pers.) P.Karst. (1879)
  • Bjerkandera mikrofumosa Ryvarden (2016)[9]
  • Bjerkandera subsimulans Murrill (1907)
  • Bjerkandera terebrans (Berk. & M.A.Curtis) Murrill (1907)
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References
  1. Karsten, P.A. (1879). "Symbolae ad mycologiam Fennicam. VI". Meddelanden af Societas pro Fauna et Flora Fennica (in Latin). 5: 15–46.
  2. Zmitrovich, I.V.; Bondartseva, M.A.; Vasilyev, N.P. (2016). "The Meruliaceae of Russia. I. Bjerkandera" (PDF). Turczaninowia. 19 (1): 5–18. doi:10.14258/turczaninowia.19.1.1.
  3. Ames, Adeline (1913). "A consideration of structure in relation to genera of the Polyporaceae". Annales Mycologici. 11 (3): 211–253.
  4. Donk, M.A. (1974). "Check list of European polypores". Verhandelingel Koninklijke Nederlandse Akademie van Wetenschappen. 62: 1–469.
  5. Floudas, D; Hibbett, D.S. (2015). "Revisiting the taxonomy of Phanerochaete (Polyporales, Basidiomycota) using a four gene dataset and extensive ITS sampling". Fungal Biology. 119: 679–719. doi:10.1016/j.funbio.2015.04.003. PMID 26228559.
  6. Murrill, W.A. (1907). North American Flora. 9. Polyporaceae–Agaricaceae. New York: New York Botanical Garden. p. 42.
  7. Westphalen, Mauro C.; Tomšovský, Michael; Kout, Jiří; Gugliotta, Adriana M. (2015). "Bjerkandera in the Neotropics: phylogenetic and morphological relations of Tyromyces atroalbus and description of a new species". Mycological Progress. 14: 100. doi:10.1007/s11557-015-1124-1.
  8. Ryvarden, Leif; Melo, Ireneia (2014). Poroid Fungi of Europe. Synopsis Fungorum. 31. Oslo, Norway: Fungiflora. p. 113. ISBN 978-8290724462.
  9. Ryvarden, L. (2016). "Studies in Neotropical polypores. 43. Some new species from tropical America". Synopsis Fungorum. 35: 43–47.
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