15-P044 Comparative analysis of midline guidance and axonal path finding in the chelicerates Cupiennius salei and Achaearanea tepidariorum

نویسندگان

  • Viktoria Linne
  • Angelika Stollewerk
چکیده

terning genes) differ as compared to Drosophila (Wheeler etal., 2005). We assume that temporal changes in spatial cues might influence neuroblast identity. This mechanism might have contributed to evolutionary changes in arthropod neurogenesis. We are therefore analysing the expression pattern of homologues of the Drosophila neuroblast identity genes (e.g. segment polarity genes, dorso-ventral patterning genes) during the whole course of neurogenesis in Tribolium.

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منابع مشابه

Cupiennius salei and Achaearanea tepidariorum: Spider models for investigating evolution and development.

The spiders Cupiennius salei and Achaearanea tepidariorum are firmly established laboratory models that have already contributed greatly to answering evolutionary developmental questions. Here we appraise why these animals are such useful models from phylogeny, natural history and embryogenesis to the tools available for their manipulation. We then review recent studies of axis formation, segme...

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Progressive activation of Delta-Notch signaling from around the blastopore is required to set up a functional caudal lobe in the spider Achaearanea tepidariorum.

In the development of most arthropods, the caudal region of the elongating germ band (the growth zone) sequentially produces new segments. Previous work with the spider Cupiennius salei suggested involvement of Delta-Notch signaling in segmentation. Here, we report that, in the spider Achaearanea tepidariorum, the same signaling pathway exerts a different function in the presumptive caudal regi...

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While there is a detailed understanding of neurogenesis in insects and partially also in crustaceans, little is known about neurogenesis in chelicerates. In the spider Cupiennius salei Keyserling, 1877 (Chelicerata, Arachnida, Araneae) invaginating cell groups arise sequentially and in a stereotyped pattern comparable to the formation of neuroblasts in Drosophila melanogaster Meigen, 1830 (Inse...

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Pervasive microRNA Duplication in Chelicerates: Insights from the Embryonic microRNA Repertoire of the Spider Parasteatoda tepidariorum

MicroRNAs are small (∼22 nt) noncoding RNAs that repress translation and therefore regulate the production of proteins from specific target mRNAs. microRNAs have been found to function in diverse aspects of gene regulation within animal development and many other processes. Among invertebrates, both conserved and novel, lineage specific, microRNAs have been extensively studied predominantly in ...

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عنوان ژورنال:
  • Mechanisms of Development

دوره 126  شماره 

صفحات  -

تاریخ انتشار 2009