Genetic population structure of three Armillaria species at the landscape scale: a case study from Swiss Pinus mugo forests

Mycological Research
Muriel BendelDaniel Rigling

Abstract

Armillaria species are plant pathogens that cause Armillaria root rot and are known to cause mortality of mountain pines (Pinus mugo) in the Swiss National Park in the Central Alps. The identity of isolates and the spatially explicit population structure of the Armillaria species were investigated in a 3.3km(2) study area in the Swiss National Park. In total, 242 Armillaria isolates, 205 from wood samples and 37 from epiphytic rhizomorphs, were collected. Species were identified using haploid-diploid pairings and genets were determined using intraspecific somatic incompatibility tests. The population structure differed markedly among the Armillaria species. A. cepistipes and A. borealis mainly occurred as genets of small spatial extent (mean 0.2ha, and 0.6ha), whereas A. ostoyae formed significantly larger genets (mean 6.8ha). The largest A. ostoyae genet extended over approx. 37ha. Several disease centres associated with Heterobasidion annosum were found to be embedded within large Armillaria genets. The extension of large A. ostoyae genets suggests that forests that occupy the study area have developed in the presence of these Armillaria genets. The finding of large Armillaria genets supports the assumption that large genets ...Continue Reading

References

Jul 31, 2002·Annual Review of Phytopathology·Gregory S Gilbert
May 17, 2006·Trends in Ecology & Evolution·Ottmar HoldenriederDavid Lonsdale
Jan 1, 1995·Annual Review of Phytopathology·J B Anderson, L M Kohn

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Citations

Dec 17, 2014·Microbial Ecology·Marco PautassoOttmar Holdenrieder
Sep 15, 2011·Mycologia·Nicholas J BrazeeRobert L Wick
Mar 3, 2010·Molecular Plant-microbe Interactions : MPMI·Michele PerazzolliClaudio Moser
Jan 29, 2010·Biological Reviews of the Cambridge Philosophical Society·Marco PautassoSigrid Hehl-Lange
Sep 12, 2020·BMC Genomics·Vasilina S AkulovaKonstantin V Krutovsky

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