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Dovana, Francesco [1], Garbelotto, Matteo [2].

An overview on Laccaria montana, a species described by Singer from the Swiss Alps.

Laccaria Berkeley & Broome is a large and widely distributed genus capable of forming symbioses with the roots of numerous plant hosts belonging to the Pinaceae, Myrtaceae, Salicaceae, Fagaceae, Dipterocarpaceae, Nothofagaceae and Fabaceae. Numerous studies have shown the beneficial effect of Laccaria on plant growth and its use for disease control, but it's possible that often its identification at the species level may be incorrect. Issues with the identification are caused by the lack of variability of species-level diagnostic morphological features. Often, only molecular analyses can reliably identify Laccaria spp., but the lack of molecular studies on type materials makes this approach uncertain. Laccaria montana was originally described by Singer in 1973 from the upper Val d'Hérens in the Valais, Switzerland. Laccaria montana is a species mainly associated with Salix and Dryas octopetala in the alpine zone. The first molecular study about this species,by Osmundson et al. (2005) included only samples from North America and demonstrated the close phylogenetic relationship between Laccaria montana and Laccaria pumila, which share the same habitat. Subsequent studies showed that sequences of Laccaria montana from Europe grouped in the same clade (/montana-pumila) from North America. In the absence of DNA  sequence  data from the  Holotype  of Laccaria montana, a preliminary study of samples collected from the locus classicus close to the Ferpècle Glacier has been conducted for the purpose of designating a possible epitype. Different basidiomes collected under Salix herbacea, Salix sp. and Dryas octopetala have been studied from a morphological and genetic point of view by comparing them with samples reported in previous studies.

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1 - University of Torino, Department of Life Sciences and Systems Biology, Viale P.A. Mattioli 25, I-10125 , Turin, Italy, Italy
2 - University of California, Berkeley, Department of Environmental Science, Policy and Management, 54 Mulford Hall, Berkeley, USA


Presentation Type: Oral Paper
Session: MY6, Mycology: Systematics and Biodiversity
Location: /
Date: Thursday, July 22nd, 2021
Time: 10:45 AM(EDT)
Number: MY6004
Abstract ID:835
Candidate for Awards:None

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