|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Parapodial glandular organs in Owenia borealis (Annelida: Oweniidae) and their possible relationship with nephridiaстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Rimskaya-Korsakova N.N., Dyachuk V., Temereva E.N.
- Журнал: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution
- Том: 334
- Номер: 2
- Год издания: 2020
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- DOI: 10.1002/jez.b.22928
- Аннотация: Oweniidae is a basal group of the recent annelids and nowadays it attracts attention of researchers of many biological fields. Surprisingly, details of their anatomy, like the adult excretory system, remain obscure. Researchers recently suggested that the paired organs of tubeworms in the family Oweniidae are related to nephridia. In the current study of Owenia borealis adults, we determined that these structures are parapodial glandular organs (PGOs) and are located in the first two segments of adults. The PGOs are complex subepidermal multicellular glands that contain secretory cells, i.e., goblet cells, which are differentiated by the type of the producing tube matter. The goblet cells are surrounded by muscles that are used to extrude material stored in the PGO’s lumen into the external environment. The anterior pair of PGOs have very well-developed rough endoplasmatic reticulum in the proximal cells, spacious Golgi complexes, numerous nail-shaped microvilli, and apocrine secretory processes in the goblet cells of the distal parts. The posterior pair of PGOs only consists of cells, which probably produce proteinaceous fibrils. We discuss the homology of goblet cells with specific nail-shaped microvilli that produce -chitin within annelids. We also discuss the possibility that PGOs and nephridia have a common origin. This study provides new information on the ultrastructure of cells that secrete the organic material used to form the tubes inhabited by tube-dwelling annelids.
- Добавил в систему: Темерева Елена Николаевна