SEIDL, S (1991) STRUCTURE AND DIFFERENTIATION OF THE SENSILLA OF THE VENTRAL SENSORY FIELD ON THE MAXILLARY PALPS OF PERIPLANETA-AMERICANA (INSECTA, BLATTODEA), PAYING SPECIAL ATTENTION TO THE CILIOGENESIS OF THE SENSORY CELLS. ZOOMORPHOLOGY, 111 (1). pp. 35-47. ISSN 0720-213X,
Full text not available from this repository.Abstract
The embryonic development of palpal contact chemosensitive sensilla was studied from 42% of development up to the hatching of the larvae. Ciliogenesis of the sensory cells can be observed at the earliest stages investigated. A complex consisting of two basal bodies and a cap-like ciliary vesicle is localized in the dendritic inner segment. It migrates apically and fuses with the cytoplasmic membrane. At the same time, microtubule doublets of the distal basal body elongate, thus generating the dendritic outer segment. Furthermore, the typical accessory structures of a motile cilium are formed. Although the central pair of microtubules is lacking, the dendritic outer segment can be considered as a modified motile cilium. At about 84% of development the hair structure starts to be formed. Whereas the socket is generated by the tormogen cell, the trichogen cell produces the hair shaft and terminal porus. The dendrite sheath, which rises above the newly formed hair, is attached apically to the embryonic cuticle forming an irregular pore. In larvae and imagines, the inner surface of the dendrite sheath is highly differentiated. A range of circular ledges and filamentous structures wrapping around the dendritic outer segments can be distinguished. These may have a stabilizing function. Furthermore, in cryo-fixed specimens, the dendritic outer segments possess regularly spaced swellings which are about 1-mu-m in length and about 0.5-mu-m in diameter. Their functional significance is still unclear.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GRYLLUS-BIMACULATUS DEG; FINE-STRUCTURE; ANTHERAEA-POLYPHEMUS; OLFACTORY HAIRS; TASTE HAIRS; LEPIDOPTERA; COCKROACH; DIPTERA; ACTIN; ULTRASTRUCTURE; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/55193 |
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