کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2173988 1093769 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of the insect head involves lateral contribution of the intercalary segment, which depends on Tc-labial function
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Formation of the insect head involves lateral contribution of the intercalary segment, which depends on Tc-labial function
چکیده انگلیسی

The insect head is composed of several segments. During embryonic development, the segments fuse to form a rigid head capsule where obvious segmental boundaries are lacking. Hence, the assignment of regions of the insect head to specific segments is hampered, especially with respect to dorsal (vertex) and lateral (gena) parts. We show that upon Tribolium labial (Tc-lab) knock down, the intercalary segment is deleted but not transformed. Furthermore, we find that the intercalary segment contributes to lateral parts of the head cuticle in Tribolium. Based on several additional mutant and RNAi phenotypes that interfere with gnathal segment development, we show that these segments do not contribute to the dorsal head capsule apart from the dorsal ridge. Opposing the classical view but in line with findings in the vinegar fly Drosophila melanogaster and the milkweed bug Oncopeltus fasciatus, we propose a “bend and zipper” model for insect head capsule formation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Developmental Biology - Volume 338, Issue 1, 1 February 2010, Pages 107–116
نویسندگان
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