Suillus grevillei
Species of fungus
From Wikipedia, the free encyclopedia
Suillus grevillei, commonly known as tamarack jack,[3] Greville's bolete, or larch bolete, is a mycorrhizal mushroom with a tight, brilliantly coloured cap, shiny and wet looking with its mucous slime layer. The hymenium easily separates from the flesh of the cap, with a central stalk that is quite slender. The species has a ring or a tight-fitting annular zone.
| Suillus grevillei | |
|---|---|
| |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Boletales |
| Family: | Suillaceae |
| Genus: | Suillus |
| Species: | S. grevillei |
| Binomial name | |
| Suillus grevillei | |
| Synonyms | |
| |
| Suillus grevillei | |
|---|---|
| Mycological characteristics | |
 | Pores on hymenium |
 | Cap is convex |
 | Hymenium is adnate |
 | Stipe has a ring |
 | Spore print is ochre |
 | Ecology is mycorrhizal |
 | Edibility is edible |
Etymology
The specific epithet is derived from Robert Kaye Greville.[4]
Description
Suillus grevillei is a mushroom with a 5–10 cm (2–4 in) cap colored from citrus yellow to burnt orange,[5] that is at first hemispherical, then bell-shaped, and finally flattened. It has a sticky skin, often with veil remnants on the edge,[6] short tubes of yellow (possibly staining brownish)[6] which descend down to the bottom of its cylindrical stalk (6–10 x 1–2 cm), which is yellowish above the ring area with streaks of reddish brown below.[6] The flesh is yellow, staining brown.[6]
Taste mild to slightly astringent to bitterish; odor none to somewhat metallic.[7]
Habitat and distribution
Edibility
Suillus grevillei can be cooked as an edible mushroom, though one without culinary interest, if the slimy cuticle is removed from the cap.[9][5]
Chemistry
The fungus produces grevillin which is characteristic of this fungus. Contain at least 11 yellow, orange, and red pigments derived from decarboxylated pulvinic acids, of which 3',4',4- trihydroxypulvinone is the major pigment. Cyclovariegatin is also partly responsible for its colour.[10]
The genetic and enzymatic basis for atromentin, the precursor to various pulvinic acid-type pigments, has been characterized (an atromentin synthetase by the name, GreA). A cosmid library (31 249 bp in total) has been made from the genome. The estimated gene density based on the cosmid library is 1 per 3900 bp of genomic DNA. The genome has a GC content of 49.8%.[citation needed]
See also
- List of North American boletes
- Larch bolete, other species of fungi associated with larch
