In the “1KFG: Deep Sequencing of Ecologically-relevant
Dikarya” project (CSP1974), we aim to sequence additional
sampling of genomic diversity within keystone lineages of
plant-interacting fungi and saprophytic fungi that are of special
ecological importance for understanding terrestrial ecosystems. In
addition, comparative genome analysis with saprotrophic,
mycorrhizal and pathogenic fungi will provide new insights into the
specific and conserved adaptations associated with each fungal
lifestyle.
Sistotrema sernanderi
Sistotrema sernanderi is a wood-inhabiting corticioid
fungus from the order Cantharellales with thin, smooth, effused
fruiting bodies. It is a wide-spread species in Europe, reported
from dead wood of deciduous trees and conifers (Duhem 2012), and
also reported from North America (Rogers 1944) and South America
(Greslebin 2001). While some species of Sistotrema are
mycorrhizal (Nilsson et al. 2006), others, like Sistotrema
sernanderi, appear to be wood saprotrophs and are found on
white-rot wood. However, this lineage of wood-decomposing fungi do
not possess class II peroxidases that are associated with advanced
white-rot fungi. Hence the genome of this species will be of
interest in studying diversity of wood decomposition strategies of
fungi.
This species is of interest from a phylogenetic perspective as
well. Sistotrema is a polyphyletic genus, and though all
the species belong to the Cantharellales, many of them are only
distantly related. It appears that S. sernanderi is not
closely related to other sequenced species of Sistotrema,
and possesses an unusual combination of characters for the genus:
its basidia are 4-sterigmatic (in most Sistotrema there
are 6 sterigmata or more) and it has well-developed gloeocystidia
(most species have none). Due to these differences Parmasto (1968)
described a separate genus, Urnobasidium, for S.
sernanderi. It is important to have a genome available for
this species when constructing a sequence-based classification for
the order Cantharellales.
The genome strain is a polysporic culture collected from a
fruiting body that grew on deciduous decayed wood in Helsinki,
Finland.
Researchers who wish to publish analyses using data from
unpublished CSP genomes are respectfully required to contact the PI
and JGI to avoid potential conflicts on data use and coordinate
other publications with the CSP master paper(s).
References
- Duhem B (2012) Études mophologiques de plusieurs Sistotrema gléocystidiés. Bulletin de la Société Mycologique de France 128:17-51
- Greslebin AG (2001) Sistotremateae (Corticiaceae, Aphyllophorales) of the Patagonian Andes forests of Argentina. Mycological Research 105:1392-1396
- Nilsson RH, Larsson KH, Larsson E, Koljalg U (2006) Fruiting body-guided molecular identification of root-tip mantle mycelia provides strong indications of ectomycorrhizal associations in two species of Sistotrema (Basidiomycota). Mycological Research 110:1426-1432.
- Parmasto E (1968) Conspectus systematis Corticiacearum. Institut zoologii i botaniki akademii nauk Estonskoy SSR, Tartu
- Rogers DP (1944) The Genera Trechispora and Galzinia (Thelephoraceae). Mycologia 36 (1):70-103