Antagonism of LIN-17/Frizzled and LIN-18/Ryk in Nematode Vulva Induction Reveals Evolutionary Alterations in Core Developmental Pathways
2011
Different Paths, Same Structure in Nematode Vulva Induction
publication
Evidence: moderate
Author Information
Author(s): Xiaoyue Wang, Ralf Sommer
Hypothesis
Developmental systems drift allows for different molecular pathways to produce similar morphological features without evolutionary penalty.
Conclusion
The study shows that two species of roundworm use different signaling pathways to achieve similar vulva structures, highlighting the concept of developmental systems drift.
Supporting Evidence
- Caenorhabditis elegans and Pristionchus pacificus share similar vulva structures but use different signaling pathways.
- The study identified that lin-17 acts as an inhibitor in vulvar induction in P. pacificus.
- Mutations in lin-17 can lead to abnormal vulva formation, indicating its critical role in the signaling pathway.
Takeaway
Even though two types of roundworms look similar, they use different methods to grow their vulvas, which shows that nature can be creative in how it builds things.
Methodology
The authors explored the molecular effects of three genes involved in vulvar induction in two roundworm species.
Digital Object Identifier (DOI)
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