Putative origin of clonal lineages of Amylostereum areolatum, the fungal symbiont associated with Sirex noctilio, retrieved from Pinus sylvestris, in eastern Canada

Bergeron, Marie-Josée; Leal, Isabel; Foord, B.; Ross, Grace; Davis, Chuck; Slippers, Bernard; Groot, Peter de; Hamelin, Richard

doi:10.1016/j.funbio.2011.05.009

Cited by 28 publications

(34 citation statements)

References 28 publications

(34 reference statements)

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“…The detection of an A. areolatum MLG unique to Canada supports the results of Nielsen et al [8] and Bergeron et al [18], who identified A. areolatum isolates unique to ENA. These findings suggest that this genotype could have been introduced from a previously unsampled S. noctilio source population, as identified by a recent analysis of a global S. noctilio collection [22], or that ENA harbours an unsampled native A. areolatum population.…”

Section: Discussionsupporting

confidence: 84%

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Lack of fidelity revealed in an insect–fungal mutualism after invasion

et al. 2013

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Symbiont fidelity is an important mechanism in the evolution and stability of mutualisms. Strict fidelity has been assumed for the obligate mutualism between Sirex woodwasps and their mutualistic Amylostereum fungi. This assumption has been challenged in North America where the European woodwasp, Sirex noctilio, and its fungal mutualist, Amylostereum areolatum, have recently been introduced. We investigate the specificity of the mutualism between Sirex and Amylostereum species in Canada, where S. noctilio co-infests Pinus with native Sirex nigricornis and its mutualist, Amylostereum chailletii. Using phylogenetic and culture methods, we show that extensive, reciprocal exchange of fungal species and strains is occurring, with 75.3 per cent of S. nigricornis carrying A. areolatum and 3.5 per cent of S. noctilio carrying A. chailletii. These findings show that the apparent specificity of the mutualism between Sirex spp. and their associated Amylostereum spp. is not the result of specific biological mechanisms that maintain symbiont fidelity. Rather, partner switching may be common when shifting geographical distributions driven by ecological or anthropogenic forces bring host and mutualist pairs into sympatry. Such novel associations have potentially profound consequences for fitness and virulence. Symbiont sharing, if it occurs commonly, may represent an important but overlooked mechanism of community change linked to biological invasions.

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Section: Discussionsupporting

confidence: 84%

“…Both MLG1 and MLG3 corresponded with previously isolated samples (MLG3 and MLG2 in Bergeron et al [18], respectively). MLG2 was unique in this study, although ITS (MLG2a and MLG2b) and IGS sequences (MLG2a) have been previously isolated [8,19].…”

Section: Resultssupporting

confidence: 75%

Lack of fidelity revealed in an insect–fungal mutualism after invasion

et al. 2013

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“…noctilio combined data for six mitochondrial and nuclear loci of the fungus (9,80) and showed that the introduction had most likely occurred more than once and from different sources. Some of these North American fungal genotypes are shared with those from the Southern Hemisphere and Europe, but others are apparently unique (Figure 1a).…”

Section: Studies To Determine the Possible Origin Of The North Americmentioning

confidence: 99%

SirexWoodwasp: A Model for Evolving Management Paradigms of Invasive Forest Pests

Slippers

Hurley

Wingfield

2015

Annu. Rev. Entomol.

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The Sirex woodwasp, Sirex noctilio, and its fungal mutualist, Amylostereum areolatum, together constitute one of the most damaging invasive pests of pine. Despite a century of research and well-established management programs, control remains unpredictable and spread continues to new areas. Variable success in managing this pest has been influenced by complex invasion patterns, the multilayered nature of biological interactions, the varying local ecologies, and microevolutionary population processes in both the biocontrol organisms and in the wasps. Recent research findings are challenging the historical perspectives on methods to manage the Sirex woodwasp, calling for management programs to incorporate the variable local dynamics affecting this pest complex. In this regard, the Sirex woodwasp provides a superb model to illustrate the need for a different approach to develop efficient and sustainable management tools to deal with the growing and global nature of pest invasions in forests and plantations.

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“…The fungus plays an important role in the lifecycle of the woodwasp through decomposition of wood, which provides a nutritional resource and habitat to the larval stage (Gilmour 1965;Boissin et al 2012). The discovery of A. areolatum in Canada presented an opportunity to use population genetic tools to investigate the potential origin of (Wooding et al 2013), which are associated with the basidiomycete Amylostereum chailletii (Persoon) Boidin (Bergeron et al 2011). The natural history of the North American native species has not been studied as thoroughly as that of S. noctilio, although they are considered to be similar in many respects (Nielsen et al 2009), including their preference for weakened trees (Stillwell 1966).…”

Section: Invasive Insects With Symbiotic Partners: Sirex Woodwaspmentioning

confidence: 99%

Evolving symbioses between insects and fungi that kill trees in Canada: new threats associated with invasive organisms

Ramsfield

2016

Can Entomol

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Abstract-Symbiotic relationships between insects and fungi are known to cause tree mortality either through direct damage by larval feeding that can be facilitated by symbiotic fungi, or through insects vectoring pathogens directly to healthy trees. Within their native ranges, the impacts of many insect-fungus symbioses are restricted to weakened and declining trees; however, within the last century tree mortality caused by globally invasive insect-fungus associations has had a devastating impact on trees in both urban and natural forest ecosystems. Unfortunately, Canadian forests have been seriously affected by invasive organisms and an emerging threat is the expansion of a native bark beetle into the boreal forest of Alberta. This paper reviews the symbiotic relationships between selected invasive insects and pathogens that cause tree mortality within the urban and forested landscapes of Canada; it uses these case studies to illustrate potentially damaging new evolutionary trajectories.

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Putative origin of clonal lineages of Amylostereum areolatum, the fungal symbiont associated with Sirex noctilio, retrieved from Pinus sylvestris, in eastern Canada

Cited by 28 publications

References 28 publications

Lack of fidelity revealed in an insect–fungal mutualism after invasion

Lack of fidelity revealed in an insect–fungal mutualism after invasion

SirexWoodwasp: A Model for Evolving Management Paradigms of Invasive Forest Pests

Evolving symbioses between insects and fungi that kill trees in Canada: new threats associated with invasive organisms

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