Histological studies on the yolk granule formation in the egg character mutant, vit, of Bombyx mori

Kazuhiro Fujikawa, Yutaka Kawaguchi, Takahiro Kusakabe, Katsumi Koga

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The formation of protein yolk spheres during oogenesis in the egg character mutation, vit, of Bombyx mori, was studied by light microscopy and transmission electron microscopy of sections of the resin-embedded follicles. The vit ovary exhibited the normal polytrophic meroistic form, in which the follicle has an oocyte, nurse cells and follicular epithelial cells. Also the accumulations of lipid droplets, glycogen granules and small yolk spheres took place normally in the vit oocytes during oogenesis. However, abnormality of the mutant appeared because large protein yolk spheres did not form. Instead, many small spheres were accumulated, which were not observed in the normal. Since the vit egg has been reported to have the egg specific protein but lack the two major yolk proteins, vitellin and the 30 kDa proteins, we infer that the vit mutation affects the incorporation of the precursors for these proteins from hemolymph to oocyte.

Original languageEnglish
Pages (from-to)111-115
Number of pages5
JournalJournal of Insect Biotechnology and Sericology
Volume72
Issue number2
Publication statusPublished - Jun 1 2003

Fingerprint

Egg Proteins
yolk proteins
Bombyx
oogenesis
Bombyx mori
Oocytes
Ovum
granules
Oogenesis
oocytes
Proteins
mutants
Vitellins
vitellin
mutation
Mutation
Protein Precursors
proteins
Hemolymph
nurses

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Applied Microbiology and Biotechnology
  • Business, Management and Accounting(all)
  • Agricultural and Biological Sciences(all)
  • Insect Science
  • Industrial and Manufacturing Engineering

Cite this

Histological studies on the yolk granule formation in the egg character mutant, vit, of Bombyx mori. / Fujikawa, Kazuhiro; Kawaguchi, Yutaka; Kusakabe, Takahiro; Koga, Katsumi.

In: Journal of Insect Biotechnology and Sericology, Vol. 72, No. 2, 01.06.2003, p. 111-115.

Research output: Contribution to journalArticle

@article{eef4d5b51b2043d09cc167a0c26316e4,
title = "Histological studies on the yolk granule formation in the egg character mutant, vit, of Bombyx mori",
abstract = "The formation of protein yolk spheres during oogenesis in the egg character mutation, vit, of Bombyx mori, was studied by light microscopy and transmission electron microscopy of sections of the resin-embedded follicles. The vit ovary exhibited the normal polytrophic meroistic form, in which the follicle has an oocyte, nurse cells and follicular epithelial cells. Also the accumulations of lipid droplets, glycogen granules and small yolk spheres took place normally in the vit oocytes during oogenesis. However, abnormality of the mutant appeared because large protein yolk spheres did not form. Instead, many small spheres were accumulated, which were not observed in the normal. Since the vit egg has been reported to have the egg specific protein but lack the two major yolk proteins, vitellin and the 30 kDa proteins, we infer that the vit mutation affects the incorporation of the precursors for these proteins from hemolymph to oocyte.",
author = "Kazuhiro Fujikawa and Yutaka Kawaguchi and Takahiro Kusakabe and Katsumi Koga",
year = "2003",
month = "6",
day = "1",
language = "English",
volume = "72",
pages = "111--115",
journal = "Journal of Insect Biotechnology and Sericology",
issn = "1346-8073",
publisher = "Japanese Society of Sericultural Sciences",
number = "2",

}

TY - JOUR

T1 - Histological studies on the yolk granule formation in the egg character mutant, vit, of Bombyx mori

AU - Fujikawa, Kazuhiro

AU - Kawaguchi, Yutaka

AU - Kusakabe, Takahiro

AU - Koga, Katsumi

PY - 2003/6/1

Y1 - 2003/6/1

N2 - The formation of protein yolk spheres during oogenesis in the egg character mutation, vit, of Bombyx mori, was studied by light microscopy and transmission electron microscopy of sections of the resin-embedded follicles. The vit ovary exhibited the normal polytrophic meroistic form, in which the follicle has an oocyte, nurse cells and follicular epithelial cells. Also the accumulations of lipid droplets, glycogen granules and small yolk spheres took place normally in the vit oocytes during oogenesis. However, abnormality of the mutant appeared because large protein yolk spheres did not form. Instead, many small spheres were accumulated, which were not observed in the normal. Since the vit egg has been reported to have the egg specific protein but lack the two major yolk proteins, vitellin and the 30 kDa proteins, we infer that the vit mutation affects the incorporation of the precursors for these proteins from hemolymph to oocyte.

AB - The formation of protein yolk spheres during oogenesis in the egg character mutation, vit, of Bombyx mori, was studied by light microscopy and transmission electron microscopy of sections of the resin-embedded follicles. The vit ovary exhibited the normal polytrophic meroistic form, in which the follicle has an oocyte, nurse cells and follicular epithelial cells. Also the accumulations of lipid droplets, glycogen granules and small yolk spheres took place normally in the vit oocytes during oogenesis. However, abnormality of the mutant appeared because large protein yolk spheres did not form. Instead, many small spheres were accumulated, which were not observed in the normal. Since the vit egg has been reported to have the egg specific protein but lack the two major yolk proteins, vitellin and the 30 kDa proteins, we infer that the vit mutation affects the incorporation of the precursors for these proteins from hemolymph to oocyte.

UR - http://www.scopus.com/inward/record.url?scp=0041917281&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0041917281&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0041917281

VL - 72

SP - 111

EP - 115

JO - Journal of Insect Biotechnology and Sericology

JF - Journal of Insect Biotechnology and Sericology

SN - 1346-8073

IS - 2

ER -