Mycorrhizae from Denali National Park and Preserve, Alaska

Treu, Roland; Laursen, Gary A.; Stephenson, Steven L.; Landolt, John C.; Densmore, Roseann V.

doi:10.1007/s005720050101

Cited by 88 publications

(76 citation statements)

References 23 publications

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“…Greipsson et al (2002) and Treu et al (1996) recorded AM structures in roots from southern Iceland and at Denali National Park in central Alaska (both c. 63 ºN), whilst, in sub-Arctic tundra, the association has been recorded at Point Barrow (71 ºN) on the northern Alaskan coast (Miller & Laursen 1978), at Abisko (68 ºN) in northern Sweden and in several studies in the Kilpisjärvi area (69 ºN) of north-western Finland Ruotsalainen et al 2004;Pietikäinen et al 2007). …”

Section: Arbuscular Mycorrhizasmentioning

confidence: 91%

“…In taiga and sub-Arctic habitats in Alaska, northern Finland and Siberia, mantles have often been recorded on the roots of Betula nana and Salix species, often S. arctica (Miller 1982;Treu et al 1996;Väre et al 1997;Michelsen et al 1998). Dryas octopetala is also colonised by ECM at Abisko in northern Sweden and Eagle Summit (65 ºN) in Alaska (Miller 1982;Michelsen et al 1998).…”

Section: Ectomycorrhizasmentioning

confidence: 99%

“…Unusually for herbaceous species, Polygonum viviparum and Kobresia myosuroides also form ECM in these regions (Hesselman 1900;Treu et al 1996;Väre et al 1997;Michelsen et al 1998).…”

Section: Ectomycorrhizasmentioning

confidence: 99%

“…A few of these records are in planta: mantles similar to those formed by Cenococcum geophilum have been recorded in central Alaska (Treu et al 1996), the northern Alaskan coast (Linkins & Antibus 1982), north-western Finland ) and Devon Island ). By contrast, there are many records of ectomycorrhizal fruiting bodies in Arctic tundra.…”

Section: Ectomycorrhizasmentioning

confidence: 99%

“…Vaccinium spp., often V. uliginosum and V. vitis-idaea but also V. myrtillus, often host ERM in these habitats, as do Cassiope tetragona and Empetrum nigrum Katenin 1964;Katenin 1972;Miller 1982;Treu et al 1996;Michelsen et al 1996;Väre et al 1997). Ledum palustre and L. procumbens also host ERM in central Alaska and in the Russian sub-Arctic, as does Andromeda polifolia in the latter region and at Abisko Katenin 1964;Katenin 1972;Miller 1982;Michelsen et al 1996;.…”

Section: Ericoid Mycorrhizasmentioning

confidence: 99%

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Mycorrhizas and dark septate root endophytes in polar regions

2009

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We review the distributions and functions of mycorrhizas and dark septate root endophytes in polar regions. Arbuscular mycorrhizas (AM) are present in the Arctic and Antarctic to 82 ºN and 63 ºS, respectively, with fine endophyte being the dominant form of AM in roots at higher latitudes. Ecto-(ECM) and ericoid (ERM) mycorrhizas both occur in the Arctic to 79 ºN, owing to the presence of species of Salix, Dryas, Vaccinium and Cassiope to this latitude.ECM and ERM are not present in Antarctic ecosystems, owing to an absence of suitable hosts. Arbutoid and orchid mycorrhizas are infrequent in the Arctic, whilst the latter is present at one location in the sub-Antarctic. Data from studies of AM, ECM and ERM colonisation along a latitudinal transect through the Arctic indicate that the frequency of plant species not colonised by mycorrhizas increases at higher latitudes, largely owing to an increase in nonmycorrhizal and a decrease in obligately mycorrhizal plant families at more northerly locations. A separate group of root-and rhizoid-associated fungi, the dark septate root endophytes (DSE), are widespread to 82 ºN and 77 ºS, and are apparently more frequent than mycorrhizal fungi in polar regions. The functions of DSE are largely unclear, but studies suggest beneficial effects on plant growth under defined conditions. We advocate further research into the effects of DSE on their host plants in polar regions.

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Section: Arbuscular Mycorrhizasmentioning

confidence: 91%

Section: Ectomycorrhizasmentioning

confidence: 99%

“…Unusually for herbaceous species, Polygonum viviparum and Kobresia myosuroides also form ECM in these regions (Hesselman 1900;Treu et al 1996;Väre et al 1997;Michelsen et al 1998).…”

Section: Ectomycorrhizasmentioning

confidence: 99%

Section: Ectomycorrhizasmentioning

confidence: 99%

Section: Ericoid Mycorrhizasmentioning

confidence: 99%

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Mycorrhizas and dark septate root endophytes in polar regions

2009

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Intraspecific polyploidy correlates with colonization by arbuscular mycorrhizal fungi in Heuchera cylindrica

Anneberg

Segraves

2019

American J of Botany

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Premise Polyploidy is known to cause physiological changes in plants which, in turn, can affect species interactions. One major physiological change predicted in polyploid plants is a heightened demand for growth‐limiting nutrients. Consequently, we expect polyploidy to cause an increased reliance on the belowground mutualists that supply these growth‐limiting nutrients. An important first step in investigating how polyploidy affects nutritional mutualisms in plants, then, is to characterize differences in the rate at which diploids and polyploids interact with belowground mutualists. Methods We used Heuchera cylindrica (Saxifragaceae) to test how polyploidy influences interactions with arbuscular mycorrhizal fungi (AMF). Here we first confirmed the presence of AMF in H. cylindrica, and then we used field‐collected specimens to quantify and compare the presence of AMF structures while controlling for site‐specific variation. Results Tetraploids had higher colonization rates as measured by total, hyphal, and nutritional‐exchange structures; however, we found that diploids and tetraploids did not differ in vesicle colonization rates. Conclusions The results suggest that polyploidy may alter belowground nutritional mutualisms with plants. Because colonization by nutritional‐exchange structures was higher in polyploids but vesicle colonization was not, polyploids might form stronger associations with their AMF partners. Controlled experiments are necessary to test whether this pattern is driven by the direct effect of polyploidy on AMF colonization.

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Occurrence of Arbuscular Mycorrhizas and Dark Septate Endophytes in Hydrophytes from Lakes and Streams in Southwest China

Wang

Zhao

2006

International Review of Hydrobiology

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In this study, the colonization of arbuscular mycorrhizas (AM) and dark septate endophytes (DSE) in 140 specimens of 32 hydrophytes collected from four lakes and four streams in southwest China were investigated. The arbuscular mycorrhizal fungi (AMF) and DSE colonization in these hydrophytes were rare. Typical AM structures were observed in one of the 25 hydrophytic species collected in lakes and six of the 17 species collected in streams.Spores of 10 identified AMF species and an unidentified Acaulospora sp. were isolated from the sediments. The identified AMF came from the four genera, Acaulospora, Gigaspora, Glomus and Scutellospora. Glomus and G. mosseae were the dominant genus and species respectively in these aquatic environments.The presence of DSE in hydrophytes was recorded for the first time. DSE occurred in one of the 25 hydrophyte species collected in lakes and three of the 17 species collected in streams.

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Mycorrhizae from Denali National Park and Preserve, Alaska

Cited by 88 publications

References 23 publications

Mycorrhizas and dark septate root endophytes in polar regions

Mycorrhizas and dark septate root endophytes in polar regions

Intraspecific polyploidy correlates with colonization by arbuscular mycorrhizal fungi in Heuchera cylindrica

Occurrence of Arbuscular Mycorrhizas and Dark Septate Endophytes in Hydrophytes from Lakes and Streams in Southwest China

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