title: Globisporangium oryzicola sp. nov., causing poor seedling establishment of directly seeded rice.
abstract: A new species, Globisporangium oryzicola, was isolated from directly seeded rice seedlings, and from soils of paddy fields and an uncultivated field. Despite their different origins, five of the seven isolates studied caused poor seedling establishment of rice in a laboratory inoculation experiment. The species is characterized by oogonia with smooth-walled or sometimes one projection, with one to two antheridia, and aplerotic oospores. Hyphal swellings were rarely observed. Phylogenetic analyses based on the internal transcribed spacer region of the ribosomal RNA gene and mitochondrial cytochrome c oxidase subunit 1 and 2 genes confirmed that the species differed from other Globisporangium species. This novel species is described and illustrated in detail.
authors.affiliation: Genetic Resources Center, National Agriculture and Food Research Organization, 2-1-2 Kannondai, Tsukuba, Ibaraki, 305-8602, Japan. uzuhashi@affrc.go.jp.
authors.forename: Shihomi
authors.initials: S
authors.lastname: Uzuhashi
authors.affiliation: Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka, 599-8531, Japan.|Research Center, Nihon Nohyaku Co.,Ltd., 345 Oyamada-cho, Kawachinagano, Osaka, 586-0094, Japan.
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Hata
authors.affiliation: Agriculture Research Center, Hiroshima Prefectural Technology Research Institute, 6869 Hara Hachihonmatsu, Higashihiroshima, Hiroshima, 739-0151, Japan.
authors.forename: Shohei
authors.initials: S
authors.lastname: Matsuura
authors.affiliation: Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka, 599-8531, Japan.
authors.forename: Motoaki
authors.initials: M
authors.lastname: Tojo
mesh_terms: D001483:Base Sequence; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D003576:Electron Transport Complex IV / Q000235:genetics; D012275:Oryza / Q000469:parasitology*; D010802:Phylogeny; D011775:Pythium / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D036226:Seedlings / Q000254:growth & development* / Q000469:parasitology*; D016415:Sequence Alignment
chemical_list: D021903:DNA, Ribosomal Spacer; D003576:Electron Transport Complex IV
keywords: Molecular phylogeny; Oomycete; Paddy field; Pythium; Rice seedlings