Death caps (Amanita phalloides) frequently establish from sexual spores, but individuals can grow large and live for more than a decade in invaded forests.
biodiversity
fungi
invasion biology
life history
mushroom
mutualisms
population genomics
spore
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
25 Dec 2023
25 Dec 2023
Historique:
received:
14
06
2023
accepted:
18
11
2023
medline:
26
12
2023
pubmed:
26
12
2023
entrez:
26
12
2023
Statut:
aheadofprint
Résumé
Global change is reshaping Earth's biodiversity, but the changing distributions of nonpathogenic fungi remain largely undocumented, as do mechanisms enabling invasions. The ectomycorrhizal Amanita phalloides is native to Europe and invasive in North America. Using population genetics and genomics, we sought to describe the life history traits of this successfully invading symbiotic fungus. To test whether death caps spread underground using hyphae, or aboveground using sexual spores, we mapped and genotyped mushrooms from European and US sites. Larger genetic individuals (genets) would suggest spread mediated by vegetative growth, while many small genets would suggest dispersal mediated by spores. To test whether genets are ephemeral or persistent, we also sampled from populations over time. At nearly every site and across all time points, mushrooms resolve into small genets. Individuals frequently establish from sexual spores. But at one Californian site, a single individual measuring nearly 10 m across dominated. At two Californian sites, the same genetic individuals were discovered in 2004, 2014, and 2015, suggesting single individuals (both large and small) can reproduce repeatedly over relatively long timescales. A flexible life history strategy combining both mycelial growth and spore dispersal appears to underpin the invasion of this deadly perennial ectomycorrhizal fungus.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Directorate for Biological Sciences
ID : DGE-1747503
Organisme : Human Frontier Science Program
ID : RGP0053/2012
Organisme : Office of the Vice Chancellor for Research and Graduate Education, University of Wisconsin-Madison
Informations de copyright
© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.
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