title: Effect of environmental gradient in coastal vegetation on communities of arbuscular mycorrhizal fungi associated with Ixeris repens (Asteraceae).
abstract: The community structure of arbuscular mycorrhizal (AM) fungi associated with Ixeris repens was studied in coastal vegetation near the Tottori sand dunes in Japan. I. repens produces roots from a subterranean stem growing near the soil surface which provides an opportunity to examine the effects of an environmental gradient related to distance from the sea on AM fungal communities at a regular soil depth. Based on partial sequences of the nuclear large subunit ribosomal RNA gene, AM fungi in root samples were divided into 17 phylotypes. Among these, five AM fungal phylotypes in Glomus and Diversispora were dominant near the seaward forefront of the vegetation. Redundancy analysis of the AM fungal community showed significant relationships between the distribution of phylotypes and environmental variables such as distance from the sea, water-soluble sodium in soil, and some coexisting plant species. These results suggest that environmental gradients in the coastal vegetation can be determinants of the AM fungal community.
authors.affiliation: Fungus/Mushroom Resource and Research Center, Tottori University, Koyama-Minami, Tottori, Japan. m_yamato@muses.tottori-u.ac.jp
authors.forename: Masahide
authors.initials: M
authors.lastname: Yamato
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yagame
authors.forename: Yuko
authors.initials: Y
authors.lastname: Yoshimura
authors.forename: Koji
authors.initials: K
authors.lastname: Iwase
mesh_terms: D019659:Asteraceae / Q000382:microbiology*; D001483:Base Sequence; D027722:Convolvulaceae / Q000382:microbiology; D029785:Cyperaceae / Q000382:microbiology; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D004777:Environment; D055137:Glomeromycota / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000302:isolation & purification*; D007564:Japan; D008969:Molecular Sequence Data; D038821:Mycorrhizae / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000302:isolation & purification*; D009792:Oceans and Seas; D010710:Phosphates / Q000032:analysis; D010802:Phylogeny; D018517:Plant Roots / Q000382:microbiology; D018547:Plant Stems / Q000382:microbiology; D006109:Poaceae / Q000382:microbiology; D054712:Salinity; D017422:Sequence Analysis, DNA; D012964:Sodium / Q000032:analysis; D012987:Soil / Q000737:chemistry; D013559:Symbiosis
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D010710:Phosphates; D012987:Soil; D012964:Sodium