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List of bioluminescent fungi

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List of bioluminescent fungi
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This list of bioluminscent fungi has more than 125 known species found largely in temperate and tropical climates.[1] They are members of the order Agaricales (Basidiomycota) with one possible exceptional ascomycete belonging to the order Xylariales[2] (with extremely faint light).[a] All known bioluminescent Agaricales are mushroom-forming, white-spored agarics that belong to four distinct evolutionary lineages. The Omphalotus lineage (comprising the genera Omphalotus and Neonothopanus) contains 12 species, the Armillaria lineage has 10 known species, while the Mycenoid lineage (Favolachia, Mycena, Panellus, Prunulus, Roridomyces) has more than 50 species. The recently discovered Lucentipes lineage contains two species, Mycena lucentipes and Gerronema viridilucens, which belong to a family that has not yet been formally named.[5] Armillaria mellea is the most widely distributed of the luminescent fungi, found across Asia, Europe, North America, and South Africa.[6]

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Bioluminescent Mycena roseoflava
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Panellus stipticus is among about 125 known species of bioluminescent fungi.

The newly discovered Eoscyphella lineage, represented by Eoscyphella luciurceolata from the Atlantic Rainforest in southern Brazil, marks a significant expansion in understanding of fungal bioluminescence.[7]

Bioluminescent fungi emit a greenish light at a wavelength of 520–530 nm. The light emission is continuous and occurs only in living cells.[8] No correlation of fungal bioluminescence with cell structure has been found. Bioluminescence may occur in both mycelia and fruit bodies, as in Panellus stipticus and Omphalotus olearius, or only in mycelia and young rhizomorphs, as in Armillaria mellea.[9] In Roridomyces roridus luminescence occurs only in the spores, while in Collybia tuberosa, it is only in the sclerotia.[10]

Although the biochemistry of fungal bioluminescence has not fully been characterized, the preparation of bioluminescent, cell-free extracts has allowed researchers to characterize the in vitro requirements of fungal bioluminescence. Experimental data suggest that a two-stage mechanism is required. In the first, a light-emitting substance (called "luciferin") is reduced by a soluble reductase enzyme at the expense of NAD(P)H. In the second stage, reduced luciferin is oxidized by an insoluble luciferase that releases the energy in the form of bluish-green light. Conditions that affect the growth of fungi, such as pH, light and temperature, have been found to influence bioluminescence, suggesting a link between metabolic activity and fungal bioluminescence.[10]

All bioluminescent fungi share the same enzymatic mechanism, suggesting that there is a bioluminescent pathway that arose early in the evolution of the mushroom-forming Agaricales.[5] All known luminescent species are white rot fungi capable of breaking down lignin, found in abundance in wood. Bioluminescence is an oxygen-dependent metabolic process and therefore may provide antioxidant protection against the potentially damaging effects of reactive oxygen species produced during wood decay.

The physiological and ecological function of fungal bioluminescence has not been established with certainty. It has been suggested that in the dark beneath closed tropical forest canopies, bioluminescent fruit bodies may be at an advantage by attracting grazing animals (including insects and other arthropods) that could help disperse their spores. Conversely, where mycelium (and vegetative structures like rhizomorphs and sclerotia) are the bioluminescent tissues, the argument has been made that light emission could deter grazing.[10]

The following list of bioluminescent mushrooms is based on a 2008 literature survey by Dennis Desjardin and colleagues,[11] in addition to accounts of several new species published since then.[12][13][14][15]

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Species

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Notes

  1. Some sources identify xylaria hypoxylon with extremely faint light.[3][4]
  2. Apparently it is the same species as given in Index Fungorum with a current name as Dictyopanus foliicola Kobayasi.[28]
  3. This species is given in Audrey et al. (2015) as Filoboletus manipularis and in Corner (1954) as Mycena manipularis var. microporus, but Index Fungorum indicates that Favolaschia manipularis is the current name.[31]
  4. This species is given in Kobayasi (1951) as Poromycena hanedae (as ′hanedai′) but Index Fungorum indicates that Filoboletus hanedae (as ′hanedai′) is the current name.[35]
  5. This species is presumably given in Corner (1994) as Mycena Noctilucens var. magnispora but Index Fungorum indicates that Mycena Noctilucens is the current name.
  6. This species is given in Corner (1954) and presumably in Corner (1994) as Mycena pruinoso-viscida and Mycena pruinoso-viscida var. rabaulensis but Index Fungorum indicates that Mycena pruinosoviscida is the current name.[60]
  7. This species is given in Corner (1981) as Pleurotus eugrammus var. radicicolus, but Index Fungorum indicates that Nothopanus eugrammus is the current name.[65]
  8. This species is given in Zang (1979) as Lampteromyces luminescens, but Index Fungorum indicates that Omphalotus japonicus is the current name.[69]
  9. This species is given in Corner (1954) as Dictyopanus pusillus var. sublamellatus and in Kobayasi (1963), Corner (1954), Corner (1986) as Panellus gloeocystidiatus but Index Fungorum indicates that Panellus pusillus is the current name.[80]
  10. This species is given in Corner (1994), Corner (1950), Horak (1978) as Mycena lamprospora, but Index Fungorum indicates that Roridomyces lamprosporus is the current name.[85]
  11. This species is given in Desjardin et al. (2008) as Mycena rorida, but both Index Fungorum and MycoBank indicate that Roridomyces roridus is the current name.[86][87]

    References

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