Development Genes and Evolution

, Volume 206, Issue 1, pp 80–85 | Cite as

Spatial and temporal expression pattern of Bombyx fork head/SGF-1 gene in embryogenesis

  • Hiroki Kokubo
  • S. Takiya
  • V. Mach
  • Y. Suzuki
ORIGINAL ARTICLE

Abstract

 The embryonic expression of Bombyx fkh/SGF-1 gene has been analysed using in situ hybridization and immunohistochemistry. Both transcripts and protein were first detected in the most anterior and posterior regions at the time of germ anlage formation, and were successively expressed in the foregut and hindgut at later stages. A weaker expression was also detected in the elongated midgut. By the time embryo retraction was finished transcripts and protein were also detectable in the invaginated whole silk glands, and after the blastokinesis stage the products were restricted to the middle and posterior silk glands achieving a state required for the SGF-1 distribution for later stages. Expression could also be detected in the central and peripheral nervous systems. From these observations, we propose that Bombyx Fkh/SGF-1 may play a role in organogenesis processes such as those of the gut, silk glands, and nervous systems, act as a region specific homeotic gene, and in spite of clear embryonic developmental differences between Drosophila and Bombyx, two terminals may be determined by region specific genes such as Bombyx fkh/SGF-1 as opposed to segmental development.

Key words fork head SGF-1 Silk gland Salivary gland Gut 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • Hiroki Kokubo
    • 1
  • S. Takiya
    • 1
  • V. Mach
    • 1
  • Y. Suzuki
    • 1
  1. 1.National Institute for Basic Biology, Myodaiji-cho, Okazaki 444, JapanJP

Personalised recommendations