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1991 Fiscal Year Final Research Report Summary

Life history of the ambrosia beetles and their symbiotic fungi.

Research Project

Project/Area Number 01480071
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 林学
Research InstitutionNagoya University

Principal Investigator

KANAMITSU Keiji  Nagoya Univ. Fac. of Agric. Professor, 農学部, 教授 (10012064)

Co-Investigator(Kenkyū-buntansha) NAKASHIMA Toshio  Hokkaido Univ. Professor Emer., 名誉教授 (60001377)
HIJII Naoki  Nagoya Univ. Fac. of Agric. Assistant Prof., 農学部, 助手 (80202274)
Project Period (FY) 1989 – 1991
KeywordsAmbrosia beetles / Symbiotic fungi / Mycangia / Ambrosiella sp. / Yeast / Symbiosis / Scolytoplatypus mikado / Xylosandrus mutilatus
Research Abstract

The fungal symbionts in the gallery system and the mycangia of the four ambrosia beetles, Scolytoplatypus mikado, Xylosandrus mutilatus, X. brevis, and X. crassiusculus, were studied using both isolation experiments and SEM microscopy. In the galleries, one of Ambrosiella spp. was predominant during the larval growing periods, but its relative dominance among all the associated fungi of each beetle species gradually decreased during development of the larvae. In contrast, yeasts (mainly Candida sp.) and Paecilomyces sp. continuously dominated in the galleries after eclosion. Ambrosiella sp. was consistently stored in the mycangia in all adult stages, except the teneral or overwintering adults during which other fungi were dominant. No fungal spores occurred in the mycangia of the adult beetles reared under aseptic conditions from the pupal stage, while only Ambrosiella sp. was stored in those from the teneral-adult stage. These results suggest that : 1) each scolytid beetle is associated with at least three fungal species, among which Ambrosiella sp. is the most essential food, -resource for development of the broods and 2) immediately after eclosion, new female adults may take a few associated fungal species, with no or incomplete selection, into their mycangia from the walls of the cradles.
Positive correlations between the diametral size of infested logs and fecundity per gallery and between the fecundity and survival rate of brood in each gallery, as observed in S. mikado, also suggested that ambrosia beetles would have the potential to increase abruptly over their endemic levels in response to increased availability of host trees.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 衣浦 晴生: "誘引トラップによる捕護されたキクイムシ類." 100回日本林学会大会論文集. 100. 601-602 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 梶村 恒: "クスノオオキクイムシ(Xyleborus mutilatus)の共生菌ー越冬期と穿入・産卵期との比較ー." 38回日本林学会大会中部支部論文集. 38. 153-156 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 衣浦 晴夫: "ミカドキクイムシ(Scolytoplatypus mikado)の共生菌ー孔道内における発育状態ー." 38回日本林学会大会中部支部論文集. 38. 157-158 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 衣浦 晴夫: "Xylosandurus属2種のキクイムシの共生菌" 日本林学会誌. 72. 441-445 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kinuura,H.: "Life history and reproduction of the ambrosia beetle,Scolyto-platypus mikado BLANDFORD(Coleptera:Scolytidae)." Japanese Joural of Entomology. 59. 763-773 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kinuura,H.: "Symbiotic fungi assciated with the ambrosia beetlw.Scolyto-platypus mikado BLANDFORD(Coleoptera:Scolytidae)-succession of the flora and fungal phasesin the gallery system and the mycangium in relation to the developmental stages of the beetle-." Journal of the Japanese forestry Society. 73. 197-205 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 梶村 恒: "クスノオオキクイムシ(Xyleborus mutilatus)の共生菌(IV)ー胞子貯蔵器官(mycangia)の微細構造と共生菌の放出方法ー" 102回日本林学会大会論文集. 102. 255-256 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 梶村 恒: "クスノオオキクイムシ(Xyleborus mutilatus)の共生菌(V)ー電気泳動法によるアンブロシア菌の蛋白質分析ー" 102回日本林学会大会論文集. 102. 257-259 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kajimura,H.: "Fungal symnionts of the ambrosia beetle,Xylosandrus mutilatus(BLANDFORD)(Coleptera:Scolytidae):dynamics of the fungal flora in the gallery system and the mycangia in relation to the life history of the beetle." Ecolgical Research.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kinuura, H., Toyoshima, Y., and Hijii, N.: "Scolytid beetles (Coleoptera) captured with a synthetic attractant." Trans. 100th Ann. Mtg. Jpn. For. Soc.601-602 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kinuura, H., Hijii, N., and Kanamitsu, K.: "Symbiotic fungi of two scolytid species of the genus Xylosandrus (Coleoptera : Scolytidae)." J. Jpn. For. Soc.72(5). 441-445 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kinuura, H. and Hijii, N.: "Life history and reproduction of the ambrosia beetle, Scolyto-platypus mikado BLANDFORD (Coleoptera : Scolytidae)." Jpn. J. Ent.59(4). 763-773 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kinuura, H., Hijii, N. and Kanamitsu, K.: "Symbiotic fungi associated with the ambrosia beetle, Scolyto-platypus mikado BLANDFORD (Coleoptera : Scolytidae) - succession of the flora and fungal phases in the gallery system and the mycangium in relation to the developmental stages of the beetle -." J. Jpn. For. Soc.73(3). 197-205 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kajimura, H., Hijii, N. and Kanamitsu, K.: "Ambrosia beetle, Xyleborus mutilatus BLANDFORD (Coleoptera : Scolytidae) and their symbiotic fungi (IV) -Ultrastructure of the mycangia and release process of fungal spores from the mycangia-." Trans. 102nd Ann. Mtg. Jpn. For. Soc.255-256 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kajimura, H. and Hijii, N.: "Fungal symbionts of the ambrosia beetle, Xylosandrus mutilatus (BLANDFORD) (Coleoptera : Scolytidae) : dynamics of the fungal flora in the gallery system and the mycangia in relation to the life history of the beetle." Ecol. Res.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kajimura, H. and Hijii, N.: "Fungal symbionts of the ambrosia beetle, Xylosandrus mutilatus (BLANDFORD) (Coleoptera : Scolytidae) : dynamics of the fungal flora in the gallery system and the mycangia in relation to the life history of the beetle." Ecol. Res.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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