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2001 Fiscal Year Final Research Report Summary

Analysis of regulational mechanism of growth and development of testis

Research Project

Project/Area Number 11460020
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 植物保護
Research InstitutionNagoya University

Principal Investigator

TANAKA Toshiharu  Graduate School, Bio-Agricultural Sciences, Nagoya University, Associate Professor, 大学院・生命農学研究科, 助教授 (30227152)

Co-Investigator(Kenkyū-buntansha) KAWAKITA Kazuhito  Graduate School, Bio-Agricultural Sciences, Nagoya University, Associate Professor, 大学院・生命農学研究科, 助教授 (90186065)
MIYATA Tadashi  Graduate School, Bio-Agricultural Sciences, Nagoya University, Professor, 大学院・生命農学研究科, 教授 (20023476)
Project Period (FY) 1999 – 2001
KeywordsEndoparasicoid / Polydnavirus / chlorofluazuron / vas deference / testis
Research Abstract

( 1 ) Parasitic castration of host, Pseudaletia separata, was caused by polydnavirus (CkPDV) and venom of Cotesia kariyai. CkPDV was expressed in testicular cells damaged like apoptosis. CkPDV genes expressed in damaged testicular cells contained sequence of two active sites of RNase T2. Damaged cells was well stained with anti-RNase T2 antibody which was produced against protein expressed in bacteria. RNase T2 family was related with self-incompatibility. However, it was unclear how RNase T2 gene was relation to decomposed testicular cells after meiotic block of cell cycling. Recently, big oil droplets were observed in fat body cells of parasitized host after parasitization. It seemed to be caused by destruction of tubulin in the cells. It was suggested that CkPDV affected the formation of tublin in the cells, so that CkPDV disturbed the formation of the spindle in mitosis or meiosis of the testis.
( 2 ) Chlorfluazuron depressed the number of progeny when chorfluazuron was applied on Spodoptera litura larvae at previous last larval stage and delay the sperm movement to vas deference. It was examined whether same effects was duplicated or not, in Pseudaletia separata, belonged to same Noctuidae family. Chlorfluazuron did not affect the delation of movement of sperm, although the growth of testis was depressed in volume.

  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Takada, Y., S.Kawamura, T.Tanaka: "Biological characteristics : growth and development of the egg parasitoid Trichogramma dendrolimi (Hymenoptera : Trichogrammatidae) on the cabbage armyworm Mamestra brassical (Lepidoptera : Noctuidae)"Appl. Entomol. Zool.. 35. 369-379 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hotta, M., T.Okuda, T.Tanaka: "Cotesia kariyai teratocytes : growth and development"J. Insect Physiol.. 47. 31-41 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takada, Y., S.Kawamura, T.Tanaka: "Host preference of Trichogramma dendrolimi (Hymenoptera : Trichogrammatidae) on its native host, Mamestra brassicae (Lepidoptera : Noctuidae) after 12 continuous generations on a factitious host"Appl. Entomol. Zool.. 36. 213-218 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nakamatsu, Y., Y.Gyotoku, T.Tanaka: "The parasitoid Cotesia kariyai (Ck) regulates the growth and metabolic efficiency of Pseudaletia separata larvae by venom and Ck polydnavirus"J. Insect Physiol.. 47. 573-584 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田中 利治: "昆虫から学ぶ生きる知恵 第15回「大学と科学」公開シンポジウム組織委員会編"クバプロ. 174 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takada, Y.; S. Kawamura and T. Tanaka: "Biological characteristics : growth and development of the egg parasitoid Trichogramma dendrolimi (Hymenoptera : Trichogrammatidae) on the cabbage armyworm Mametra brassicae (Lepidoptera : Noctuidae)."Appl. Entomol. Zool.. 35. 369-379 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hotta, M., T. Okuda and T. Tanaka: "Cotesia kariyai teratocytes : growth and development"J. Insect Physiol.. 47. 31-41 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takada, Y., S. Kawamura, T. Tanaka: "Host preference of Triehogramma dendrolimi(Hymenoptera : Trichogrammatidae) on its native host, Mamestra brassicae (Lepidoptera : Noctuidae) after 12 continuous generation s on a factitious host"Appl. Entomol. Zool.. 36. 213-218 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] I Nakamatsu. Y., Y. Gyotoku, T. Tanaka,: "The parasitoid Cotesia kariyai (Ck) regulates the growth and metabolic efficiency of Pseudaletia separata larval by venom and Ck polydnavirus"J. Insect Physiol.. 47. 573-584 (2001)

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

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Published: 2003-09-17  

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