ヒラタケ白こぶ病病原線虫 Iotonchium ungulatum の昆虫寄生態雌線虫及び生活環の記載 The Insect-parasitic Stage and Life Cycle of Iotonchium ungulatum (Tylenchida : Iotonchiidae), the Causal Agent of Gill-knot Disease of the Oyster Mushroom

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Author(s)

    • 津田 格 TSUDA Kaku
    • Laboratory of Environmental Mycoscience, Graduate School of Agriculture, Kyoto University Laboratory of Environmental Mycoscience, Graduate School of Agriculture, Kyoto University
    • 二井 一禎 FUTAI Kazuyoshi
    • Laboratory of Environmental Mycoscience, Graduate School of Agriculture, Kyoto University Laboratory of Environmental Mycoscience, Graduate School of Agriculture, Kyoto University

Abstract

ヒラタケ白こぶ病の病原線虫<I>Iotonckium ungulatum</I>の昆虫寄生態雌線虫の形態、及び生活環を記載した。昆虫寄生態雌線虫は、キノコバエ科の一種ナミトモナガキノコバエ<I>Rhymosia domestica</I>の血体腔内に寄生し、そこで産卵する。病害子実体から羽化してきたキノコバエを解剖したところ、血体腔内で孵化した幼線虫のキノコバエ卵巣への侵入が観察された。キノコバエ卵巣から取り出した幼線虫をヒラタケ子実体に接種すると、ひだ上にこぶが生じた。このことから、キノコバエの産卵行動時に新しいヒラタケ子実体に産み付けられた幼線虫が菌食態雌線虫へ発育するものと考えられた。病害子実体から羽化してきたキノコバエが保持する寄生態雌線虫数は、雄キノコバエよりも雌キノコバエにおいて有意に多かった。

<I>Iotonchium ungulatum</I> is the causal agent of gill-knot disease of the oyster mushroom, <I>Pleurotus ostreatus</I>. The insect-parasitic females of this nematode are described. The insect-parasitic female nematodes inhabit and lay many eggs in the haemocoel of the fungus gnat, <I>Rhymosia domestica</I>. Juvenile nematodes hatched from these eggs invade host gnats ovaries, and the nematodes are supposed to be deposited on the gills of the oyster mushroom where they generate knots and grow into the mycetophagous females. In the laboratory experiment, female gnats harbored significantly greater number of insect-parasitic female nematodes than did the male gnats. <I>Jpn. J. Nematol.</I> 30 (1/2): 1-7 (2000).

Journal

  • Nematological Research (Japanese Journal of Nematology)

    Nematological Research (Japanese Journal of Nematology) 30(1), 1-7, 2000-12-28

    The Japanese Nematological Society

References:  6

Codes

  • NII Article ID (NAID)
    10008014817
  • NII NACSIS-CAT ID (NCID)
    AN10453166
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09196765
  • NDL Article ID
    5728775
  • NDL Source Classification
    ZR4(科学技術--生物学--動物)
  • NDL Call No.
    Z18-1311
  • Data Source
    CJP  NDL  J-STAGE  JASI 
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