Suillus sibiricus

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Suillus sibiricus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Boletales
Family: Suillaceae
Genus: Suillus
Species:
S. sibiricus
Binomial name
Suillus sibiricus
(Singer) Singer (1945)
Synonyms[1]
  • Ixocomus sibiricus Singer (1938)
  • Boletus sibiricus (Singer)
    A.H.Sm.
    (1949)
Suillus sibiricus
View the Mycomorphbox template that generates the following list
Pores on hymenium
Cap is convex or flat
Hymenium is adnate or decurrent
Stipe has a ring or is bare
mycorrhizal
Edibility is edible or can cause allergic reactions

Suillus sibiricus is a

conspecific
with the latter species.

Taxonomy, naming, and phylogeny

S. umbonatus (Western North America)

S. sibiricus (USA-Arizona)

S. americanus (USA-Michigan)

S. sibiricus (Nepal)

S. sibiricus (China-Jilin)

S. sibiricus (China-Yunnan)

Possible phylogenetic relationships of S. sibiricus and related species with an eastern Asian/eastern North American disjunct distribution.[2]

The species was first described scientifically under the name Ixocomus sibiricus by American mycologist Rolf Singer in 1938, based on material that was collected under Pinus cembra var. sibirica in the Altai Mountains of central Asia.[3] In 1945, he transferred it to Suillus.[4] Alexander H. Smith called the species Boletus sibiricus in 1949,[5] but this is today considered a synonym.[1] Singer named the subspecies S. sibiricus subsp. helveticus in 1951,[6] based on material collected by Jules Favre from Switzerland in 1945. Roy Watling later considered this a nomen nudum—not published with an adequate description, and therefore failing to qualify as a formal scientific name.[7]

According to Singer's 1986 arrangement, S. sibiricus is

classified in the subsection Latiporini of section Suillus in the genus Suillus. Section Suillus includes species with glandular dots on the stem, and a partial veil which becomes appendiculate on the cap edge. Characteristics of species in subsection Latiporini include cinnamon-coloured spore prints without an olive tinge, and wide pores on the underside of the cap (wider than 1 mm when mature). Other species in the subsection include S. flavidus, S. umbonatus, S. punctatipes, and S. americanus.[8]

A phylogenetic analysis of various eastern Asian and eastern North American disjunct Suillus species revealed that S. sibiricus forms a well-supported clade with S. americanus and S. umbonatus;[2] these relationships are corroborated by a previous analysis (1996), which used a larger sampling of Suillus species to determine taxonomic relationships in the genus.[9] Within this clade, S. umbonatus and U.S. S. sibiricus can be separated from the rest of the group. However, the phylogenetic relationships among the tested isolates determined from different methods of analysis are not always consistent and could not be established with confidence. In general, there is little phylogenetic divergence detected in this clade.[2]

Description

The angular pores are greater than 1 mm wide.

The fruit body of Suillus sibiricus is a medium-sized bolete. The cap is at first hemispherical and straw yellow, but expands with maturity and finally flattens out becoming darker with reddish brown spots or fibrils. The cap diameter is up to 10 cm (3.9 in). The cap cuticle is mucilaginous especially when moist and can be peeled off. A partial veil extends from the stem to the cap periphery in immature specimens. In mature specimens, it is obliterated leaving a felty ring around the stem and fragments hanging from the cap periphery. The tubes are initially yellow but become brown, adnate or slightly decurrent. The pores are angular, wider than 1 mm in diameter and the same colour as the tubes but stain dirty pink or vinaceous when bruised.[10] The tubes that make up the pores are 7 to 10 mm (0.3 to 0.4 in) long.[11] Droplets can be present and these leave dark brown spots after drying out.[12]

The

microscope.[12] The basidia (spore-bearing cells) are club-shaped, four-spored, and measure 22–34 by 5–8 μm.[11] The flesh reddens and then blackens when potassium hydroxide solution is applied. With iron(II) sulfate solution, the flesh slowly discolours to grey.[14]

Suillus sibiricus is reportedly edible, but it is without any commercial or culinary value.[12][15][16] It is one of over 200 species of mushrooms frequently collected for consumption in Nepal.[17] Its taste has been described variously by authors as sour (Europe) and not distinctive or slightly bitter (North America). Its odour is not distinctive.[10][12] It can cause allergic reactions.[10]

Similar species

In North America, Suillus americanus has a similar appearance, but a more easterly distribution. It is associated with eastern white pine. Although some authors have tried to distinguish between the two with by using width of the stem, or by differences in fruit body colouration, it is acknowledged that these characteristics are variable, and depend on environmental factors.[14] The phylogenetic analysis of Wu and colleagues (2000) suggests that the two taxa may be the same, although more samples from different geographical areas will be needed to verify this.[2]

Distribution and habitat

Macedonian pine. Rila mountain, Bulgaria

Suillus sibiricus has been recorded in parts of Europe, North America and Siberia. The fungus forms strict

pure culture conditions in the laboratory.[21]

The fungus is rare in Europe and its distribution typically corresponds with high elevations at or near the alpine

winter sports.[15]

The fungus fruits in summer and autumn in Europe, and in western North America where it often occurs abundantly.

Nuevo Leon, Mexico.[25]

See also

Notes

  1. ^ European countries in which S. sibiricus is found include Austria, Bulgaria, Czech Republic, France, Germany, Italy, Macedonia, Montenegro, Poland, Slovakia and Switzerland.[15][18][22][23]
  2. ^ European countries in which S. sibiricus is red listed or protected include Austria, Bulgaria, France, Germany, Macedonia (preliminary Red List), Montenegro (protected but not red listed), Poland, Slovakia and Switzerland.[15][18][22][23]

References

  1. ^ a b "Species synonymy: Suillus sibiricus (Singer) Singer". Index Fungorum. CAB International. Retrieved 2010-07-22.
  2. ^
    PMID 11020303
    .
  3. ^ Singer R. (1938). "Sur les genres Ixocomus, Boletinus, Phylloporus, Gyrodon et Gomphidius" [On the genera Ixocomus, Boletinus, Phylloporus, Gyrodon and Gomphidius]. Revue de Mycologie (in French). 3: 35–53.
  4. ^ Singer R. (1945). "The Boletineae of Florida with notes on extralimital species. II. The Boletaceae (Gyroporoideae)". Farlowia. 2 (2): 223–303.
  5. ISBN 0-02-852420-9
    .
  6. ^ Singer R. (1949). "The Agaricales in Modern Taxonomy". Lilloa. 22 (2): 657.
  7. doi:10.1080/03746606508685128
    .
  8. ISBN 3-87429-254-1
    .
  9. JSTOR 3760972
    .
  10. ^
    ISBN 0-89815-169-4
    .
  11. ^
    ISBN 978-0-02-853410-7
    . Retrieved 2010-07-22.
  12. ^ a b c d e Ts. Hinkova (1986). Нашите Гъби [Our Mushrooms]. Zemizdat (Bulgaria). p. 28.
  13. ^
    JSTOR 3756270
    . (subscription required)
  14. ^ a b c d Michael Kuo. "Suillus sibiricus". Mushroom Expert. Retrieved 2010-07-22.
  15. ^ a b c d e f Dahlberg A, Croneborg H (2003). 33 Threatened Fungi in Europe (PDF). Uppsala, Sweden: Swedish Species Information Centre. pp. 11, 74–75. Retrieved 2010-07-22.
  16. ^ a b Phillips R. "Suillus sibiricus". Rogers Mushrooms. Rogers Plants Ltd. Retrieved 2010-07-22.
  17. S2CID 6985365
    .
  18. ^ a b c "Maślak syberyjski Suillus sibiricus" (in Polish). NaGrzyby. Retrieved 2010-07-22.
  19. ^ Grand LF. (1968). "Conifer associates and mycorrhizal synthesis of some Pacific Northwest Suillus species". Forest Science. 14 (3): 304–12.
  20. ^ "Maslyonok Sibirskiy (Suillus sibiricus)" (in Russian). florAnimal. Retrieved 2010-07-22.
  21. ISSN 0367-973X
    .
  22. ^ a b Kasom G, Miličković N (2006). "Protected Species of Macromycetes in the Republic of Montenegro" (PDF). Institute for the Protection of Nature of Montenegro. Retrieved 2010-07-22.
  23. ^ a b Karadelev M. (2000). A Preliminary Red List of Macromycetes in the Republic of Macedonia by Institute of Biology, Faculty of Natural Science, Skopje (PDF) (Report). European Council for the Conservation of Fungi. pp. 7–10. Retrieved 2010-07-22.
  24. doi:10.1016/j.fldmyc.2011.12.003
    .
  25. ^ Garcia J, Castillo J (1981). "Species of Boletaceae and Gomphidaceae fungi known in Nuevo Leon Mexico". Boletin de la Sociedad Mexicana de Micologia (in Spanish). 15: 121–98.

External links

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