Control of cell cycle timing during C. elegans embryogenesis

Zhirong Bao*, Zhongying Zhao, Thomas J. Boyle, John I. Murray, Robert H. Waterston

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

55 Citations (Scopus)


As a fundamental process of development, cell proliferation must be coordinated with other processes such as fate differentiation. Through statistical analysis of individual cell cycle lengths of the first 8 out of 10 rounds of embryonic cell division in Caenorhabditis elegans, we identified synchronous and invariantly ordered divisions that are tightly associated with fate differentiation. Our results suggest a three-tier model for fate control of cell cycle pace: the primary control of cell cycle pace is established by lineage and the founder cell fate, then fine-tuned by tissue and organ differentiation within each lineage, then further modified by individualization of cells as they acquire unique morphological and physiological roles in the variant body plan. We then set out to identify the pace-setting mechanisms in different fates. Our results suggest that ubiquitin-mediated degradation of CDC-25.1 is a rate-determining step for the E (gut) and P3 (muscle and germline) lineages but not others, even though CDC-25.1 and its apparent decay have been detected in all lineages. Our results demonstrate the power of C. elegans embryogenesis as a model to dissect the interaction between differentiation and proliferation, and an effective approach combining genetic and statistical analysis at single-cell resolution.
Original languageEnglish
Pages (from-to)65-72
Number of pages8
JournalDevelopmental Biology
Issue number1
Publication statusPublished - 1 Jun 2008
Externally publishedYes

User-Defined Keywords

  • Statistics
  • Single cell
  • Fate differentiation
  • cdc25
  • Skp1-related


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