Abstract: Arbuscular mycorrhizae (AM) are seldom reported from high latitudes. We found that Asteraceae (Arnica, Erigeron, and Taraxacum) at a site on Axel Heiberg Island (approximately 80[degrees]N) have abundant AM and fine endophytes (FE). We used standard microscopic methods for examination and quantification, plus high-resolution confocal fluorescence imaging. AM in Arctic Asteraceae were compared with those in congeners from Saskatoon and with those in some other Arctic species. Arctic AM had 6 [micro]m wide aseptate hyphae producing abundant arbuscules, vesicles, and ...
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