Universität zu Köln

Boyan, George and Ehrhardt, Erica ORCID: 0000-0002-9252-1414 (2020). Epithelial domains and the primordial antennal nervous system of the embryonic grasshopper Schistocerca gregaria. Invertebr. Neurosci., 20 (2). HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1439-1104

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Abstract

The antenna is a key sensory organ in insects. Factors which pattern its epithelium and the spacing of sensillae will play an important role in shaping its contribution to adaptive behavior. The antenna of the grasshopper S. gregaria has three major articulations: scape, pedicel, and flagellum. During postembryonic development, the flagellum lengthens as segments (so-called meristal annuli) are added at each molt. However, the five most apical annuli do not subdivide; thus, their epithelial domains must already be defined during embryogenesis. We investigated epithelial compartmentalization and its relationship to the developing primordial nervous system of the antenna by simultaneous immunolabeling against the epithelial cell surface molecule Lachesin, against neuron-specific horseradish peroxidase, and against the mitosis marker phospho-histone 3. We found that Lachesin is initially expressed in a highly ordered pattern of rings and a sock in the apical antennal epithelium of the early embryo. These expression domains appear in a stereotypic order and prefigure later articulations. Proliferative cells segregate into these developing domains and pioneer- and sensory-cell precursors were molecularly identified. Our study allows pioneer neurons, guidepost cells, and the earliest sensory cell clusters of the primordial nervous system to be allocated to their respective epithelial domain. As the apical-most five domains remain stable through subsequent development, lengthening of the flagellum must originate from more basal regions and is likely to be under the control of factors homologous to those which regulate boundary and joint formation in the antenna of Drosophila.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Boyan, George UNSPECIFIED UNSPECIFIED UNSPECIFIED Ehrhardt, Erica UNSPECIFIED orcid.org/0000-0002-9252-1414 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-340239
DOI:	10.1007/s10158-020-0240-z
Journal or Publication Title:	Invertebr. Neurosci.
Volume:	20
Number:	2
Date:	2020
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	1439-1104
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language UNPAIRED MEDIAN NEURONS; DISTAL-LESS; IMMUNOGLOBULIN SUPERFAMILY; PIONEER NEURONS; DESERT LOCUST; DROSOPHILA; EXPRESSION; GROWTH; ORTHOPTERA; LACHESIN Multiple languages Neurosciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34023