Identification of Endosymbionts in Oligobrachia mashikoi (Siboglinidae, Annelida) Identification of Endosymbionts in Oligobrachia mashikoi (Siboglinidae, Annelida)

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Abstract

金沢大学理工研究域自然システム学系

<i>Oligobrachia mashikoi</i>, a frenulata, is a marine invertebrate living in an unusual habitat in Tsukumo Bay (20-25 m deep), Japan. It lacks a mouth and a gut, and instead possesses specialized cells called bacteriocytes, in which endosymbiotic bacterial cells are kept. The endosymbiosis involves specific interactions and obligatory metabolic exchanges between the host and endosymbiotic bacterial cells. Analyses of 16S rRNA genes from the endosymbiotic cells indicated that there are at least seven phylotypes of endosymbionts in <i>O. mashikoi</i>, and these phylotypes are closely related <i>Gammaproteobacteria</i> among which sequence homology was more than 97.6%. The analyses suggested that an adult worm predominantly accommodates one of the seven phylotypes. <i>In situ</i> hybridization targeting 16S rRNA demonstrated that the distribution patterns of the bacterial cells in adult worms were very similar among at least two phylotypes of the endosymbionts. The findings suggest that <i>O. mashikoi</i> has a strict selection mechanism for its endosymbiont.<br>

Journal

  • Microbes and Environments

    Microbes and Environments 22(2), 136-144, 2007-06-01

    Japanese Society of Microbial Ecology

References:  37

Cited by:  7

Codes

  • NII Article ID (NAID)
    110006290376
  • NII NACSIS-CAT ID (NCID)
    AA11173196
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    13426311
  • NDL Article ID
    8766008
  • NDL Source Classification
    ZR5(科学技術--生物学--菌類・微生物)
  • NDL Call No.
    Z54-J644
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE 
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