title: Varietal differences in the growth responses of rice to an arbuscular mycorrhizal fungus under natural upland conditions.
abstract: Seedlings of three rice (Oryza sativa L.) varieties (one indica, ARC5955; and two japonica, Nipponbare and Koshihikari) with or without pre-colonization by the arbuscular mycorrhizal fungus Funneliformis mosseae were transplanted into an upland field and grown to maturity. Pre-colonization had no effect on the yield of Nipponbare or Koshihikari. However, pre-colonized ARC5955 exhibited a strong tendency toward increased yield, which was accompanied by increases in the percentage of ripened grain and the 1000-grain weight. The rice roots were also colonized by indigenous arbuscular mycorrhizal fungi in the field, but these had only limited effects on shoot biomass and grain yields. We speculate that F. mosseae may have exhibited priority effects, allowing it to dominate the rice roots. There was no significant difference in the contents of most mineral elements in the shoots of pre-colonized ARC5955 at harvest, indicating that some other factor is responsible for the observed yield increase.
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Thongkhoun
authors.initials: T
authors.lastname: Sisaphaithong
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Hanai
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Tomioka
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kobae
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Aiko
authors.initials: A
authors.lastname: Tanaka
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Katsuya
authors.initials: K
authors.lastname: Yano
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.
authors.forename: Chisato
authors.initials: C
authors.lastname: Takenaka
authors.affiliation: a Graduate School of Bioagricultural Sciences, Nagoya University , Chikusa-ku , Nagoya , Japan.|b Faculty of Agriculture, Ryukoku University , Seta Oe-cho, Otsu , Shiga , Japan.
authors.forename: Shingo
authors.initials: S
authors.lastname: Hata
mesh_terms: D038821:Mycorrhizae / Q000502:physiology*; D012275:Oryza / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology; D036226:Seedlings / Q000382:microbiology*; D013559:Symbiosis / Q000502:physiology
keywords: Arbuscular mycorrhiza; Funneliformis mosseae; Oryza sativa; field experiment; grain yield; symbiosis