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1987 Fiscal Year Final Research Report Summary

Physiological and biochemical studies on the cold-adaptation of the silkworm eggs.

Research Project

Project/Area Number 60560064
Research Category

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

Allocation TypeSingle-year Grants
Research Field 蚕糸学
Research InstitutionKyoto Institute of Technology

Principal Investigator

FURUSAWA Toshiharu  associate Prof. Faculty of Textile Science, Kyoto Institute of Technology, 繊維学部, 助教授 (70127166)

Project Period (FY) 1985 – 1987
Keywordssilkworm eggs / sorbitol / glycerol / lipid / alcohol / phosphoglyceride / permeability / 不飽和脂肪酸
Research Abstract

The biochemical responses of Bombyx eggs to cold environment was examined from the viewoint of polyol and lipid metabolisms. The sorbitol accumulation was observed even in non-diapause eggs when these eggs were kept below 10゜C. However, the fluctuation of sorbitol would be different between temperatures of 1゜C and 5゜C. This phenomenon may be not due to phosphofructokinase activity but the difference of NAD-sorbitol dehydrogenase activity in the non-diapause eggs under lower temperatures.
As for lipids which would be associated with oxygen permeability of egg-shells on the initiation of diapause, GC-MS analysis indicated that they were consisted of two components: acetate esterified alcohols of chain length C_<32> and C_<52>, saturated. The predominant phosphoglyceride in silkworm eggs is phsphatidylcholone (PC), followed by Phosphatidylethanolomine (PE) and phosphatidyl serine (PS). PC, PE and PS contained palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (18:2) and linolenic acid (C18:3) as fatty acylchains. Unsaturated fatty acid in phosphoglyceride was changed in quality by chilling of the eggs under lower temperatures.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 吉見知明: Nippon Nogeikagaku Kaishi. 61. 217-219 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉沢寿治: 日本蚕糸学雑誌. 56. 143-149 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉沢寿治: 日本蚕糸学雑誌. 56. 150-156 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Indrasith L.S.: Insect Biochem. 17. 539-545 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Furusawa T.: J.Seric.Sci.Jpn.56. 202-209 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Furusawa T.: J.Seric.Sci.Jpn. 56. 467-473 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tomoaki YOSHIMI: "Identification of phosphoglycerides from silkworm eggs" Nippon Nogeikagaku Kaishi. 61. 217-219 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshiharu FURUSAWA: "Fluctuation of the free sugars with embryonic development of non-diapause eggs of the silkworm, Bombyx mori." J. Sxeric. Sci. Jpn.56(2). 143-149 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshiharu FURUSAWA: "Polyol accumulation in the non-diapause eggs of the silkworm, Bombyx mori." J. Seric. Sci. Jpn.56(2). 150-156 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] L. S. INDRASITH: "Limited degradation of vitellin and egg-specific protein in Bombyx mori eggs during embryogenesis" Insect Biochem.17(4). 539-545 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshiharu FURUSAWA: "Control of polyol metabolism and diapause duration of Bombyx eggs by anaerobiosis" J. Seric. Sci. Jpn.56(3). 202-209 (1987)

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

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Published: 1989-03-30  

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