Occurrence of an Ephelis Fungus on Ishigaki Island and Observations on its Epiphytic Association with Host Grasses

JIRCAS Journal
ISSN 13407686
書誌レコードID(総合目録DB) AA11030483
本文フルテキスト

Distribution of Ephelis-infected grasses on Ishigaki, and the frequency at which infected plants were present, were observed over a three year period. Sites with infected plants were most commonly wet areas that had been undisturbed for many years. The frequency of infection varied widely between grass species. In three of the fifteen grasses found to be hosts to this fungus, infected plants were present at many sites, while in other species, infected plants were present at only one or two sites. Ephelis infection of three of the grasses was found in only one plant. The number of infected tillers at each site was typically low with apparently a random distribution, and no evidence of spread from sites of infection. Infected plants were characterized by stromata that covered the inflorescence with dense mycelial growth, and in most grasses, by hyphae on the surface of the leaf blades. Infected plants typically showed both infected and Ephelis-free tillers. Examination of infected plants of 10 species revealed that the Ephelis fungus was essentially an epiphyte, with hyphae in vegetative tillers being located on the surface of the stem apex, including primordial leaves. Hyphae on the leaf blades were also apparently confined to epiphytic growth. Possible mechanisms for infection, the ecological and economic significance of Ephelis infection on Ishigaki, and areas for future research are outlined.

刊行年月日
作成者 Michael J. CHRISTENSEN Keiichi TAKAHASHI Katsuyuki KOHNO Takao TSUKIBOSHI Makoto KOBAYASHI
著者キーワード Clavicipitaceae Ephelis epiphyte grasses
公開者 Japan International Research Center for Agricultural Sciences
オンライン掲載日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
8
開始ページ 49
終了ページ 60
権利 Japan International Research Center for Agricultural Sciences
言語 eng