Molecular community analysis of arbuscular mycorrhizal fungi in roots of geothermal soils in Yellowstone National Park (USA).

摘要: To better understand adaptation of plants and their mycorrhizae to extreme environmental conditions, we analyzed the composition communities arbuscular mycorrhizal fungi (AMF) in roots from geothermal sites Yellowstone National Park (YNP), USA. Arbuscular were identified using molecular methods including seven specific primer pairs for regions ribosomal DNA that amplify different subgroups AMF. Roots Dichanthelium lanuginosum, a grass only occurring areas, sampled along with thermal nonthermal Agrostis scabra control growing outside thermally influenced sites. In addition, root samples stolonifera areas Iceland identify possible common mycosymbionts between these geographically isolated locations. YNP, 16 phylotypes belonging genera Archaeospora, Glomus, Paraglomus, Scutellospora, Acaulospora detected. Eight could be assigned known morphospecies, two others have been reported previously studies environments, six new science. The most diverse abundant lineage was Glomus group A, frequent phylotype corresponding intraradices. Five detected preliminary sampling area also found YNP. Nonthermal vegetation dominated by high diversity A while not. Using multivariate analyses, subset three determined associated conditions field analyzed. conclusion, AMF soils are distinct composition, both unique generalist occur across broad range conditions.