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An ancestral regulatory network for posterior development in arthropods 174 Communicative & Integrative Biology 2009; Vol. 2 Issue 2
 

Summary: An ancestral regulatory network for posterior development in arthropods
174 Communicative & Integrative Biology 2009; Vol. 2 Issue 2
[Communicative & Integrative Biology 2:2, 174-176; March/April 2009]; 2009 Landes Bioscience
A number of recent studies have investigated posterior develop-
ment in several different arthropods. As previously found in spiders,
it has been discovered that Delta-Notch signaling is required for
the development of posterior segments in an insect, the cockroach
Periplaneta americana. Furthermore analysis of Wnt8 function
in the spider Achaearanea tepidariorum and the beetle Tribolium
castaneum demonstrates that this Wnt ligand is required for the
establishment of the growth zone and development of posterior
segments in both these arthropods. Taken together these studies
provide an interesting insight into the architecture of the genetic
network that regulated posterior development in the common
ancestor of the arthropods.
Introduction
During embryogenesis in the fruit fly, Drosophila melanogaster,
all segments are specified almost simultaneously. This is called the
long germ mode of development. In contrast, most other arthropods
exhibit short germ development, during which posterior segments

  

Source: Alwes, Frederike - Department of Organismic and Evolutionary Biology, Harvard University

 

Collections: Biology and Medicine