کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10932887 | 1093755 | 2010 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evolutionary plasticity of collier function in head development of diverse arthropods
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیولوژی سلول
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چکیده انگلیسی
The insect intercalary segment represents a small and appendage-less head segment that is homologous to the second antennal segment of Crustacea and the pedipalpal segment in Chelicerata, which are generally referred to as “tritocerebral segment.” In Drosophila, the gene collier (col) has an important role for the formation of the intercalary segment. Here we show that in the beetle Tribolium castaneum col is required for the activation of the segment polarity genes hedgehog (hh), engrailed (en) and wingless (wg) in the intercalary segment, and is a regulatory target of the intercalary segment specific Hox gene labial (lab). Loss of Tc col function leads to increased cell death in the intercalary segment. In the milkweed bug Oncopeltus fasciatus, the loss of col function has a more severe effect in lacking the intercalary segment and also affecting the adjacent mandibular and antennal segments. By contrast, col is not expressed early in the second antennal segment in the crustacean Parhyale hawaiensis or in the pedipalpal segment of the spider Achaearanea tepidariorum. This suggests that the early expression of col in a stripe and its role in tritocerebral segment development is insect-specific and might correlate with the appendage-less morphology of the intercalary segment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Developmental Biology - Volume 344, Issue 1, 1 August 2010, Pages 363-376
Journal: Developmental Biology - Volume 344, Issue 1, 1 August 2010, Pages 363-376
نویسندگان
Nina D. Schaeper, Matthias Pechmann, Wim G.M. Damen, Nikola-Michael Prpic, Ernst A. Wimmer,