Functional analysis of the role of eyes absent and sine oculis in the developing eye of the cricket Gryllus bimaculatus

Akira Takagi, Kazuki Kurita, Taiki Terasawa, Taro Nakamura, Tetsuya Bando, Yoshiyuki Moriyama, Taro Mito, Sumihare Noji, Hideyo Ohuchi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


In the cricket Gryllus bimaculatus, a hemimetabolous insect, the compound eyes begin to form in the embryo and increase 5-6 fold in size during the postembryonic development of the nymphal stage. Retinal stem cells in the anteroventral proliferation zone (AVPZ) of the nymphal eye proliferate to increase retinal progenitors, which then differentiate to form new ommatidia in the anterior region of the eye. However, mechanisms underlying this type of eye formation have not been well elucidated yet. Here, we found that the homologues of the retinal determination transcription factor genes of eyes absent (eya) and sine oculis (so) are expressed during the cricket embryonic eye formation. eya is also expressed intensely in the AVPZ of the nymphal eye. To explore their functions, we performed knockdown by RNA interference (RNAi). Knockdown of Gb'eya resulted in loss of the embryonic eye. In the nymphal eye, RNAi against Gb'eya or Gb'so impaired retinal morphology by apparently transforming cornea structures into head cuticle. These results imply that Gb'eya and Gb'so are essential for the differentiation of the retinal progenitor cells and maintaining retinal structures during eye development.

Original languageEnglish
Pages (from-to)227-240
Number of pages14
JournalDevelopment Growth and Differentiation
Issue number2
Publication statusPublished - Feb 2012
Externally publishedYes


  • Anteroventral proliferation zone
  • Eye development
  • Eyes absent
  • Gryllus bimaculatus
  • RNA interference
  • Sine oculis

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology


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