Naslov
Cilia-like structures anchor the amphioxus notochord to its sheath

Autori
Bočina, Ivana ; Ljubešić, Nikola ; Saraga-Babić, Mirna

Izvornik
Acta Histochemica (0065-1281) 113 (2011), 1; 49-52

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
amphioxus; cilia; b-tubulin; dynein; notochord

Sažetak
Body stiffness is important during undulatory locomotion in fish.In amphioxus, the myosepta play an important role in transmission of muscular forces to the notochord.In order to define the specific supporting role of the notochord in amphioxus during locomotion, the ultrastructure of 10 adult amphioxus specimens was analyzed using transmission electron microscopy. Numerous cilia-like structures were found on the surface of each notochordal cell at the sites of their attachment to the notochordal sheath. Ultrastructurally, these structures consisted of the characteristic arrangement of peripheral andcentral microtubular doublets and were anchored to the inner layer of the notochordal sheath. Immunohistochemically, a positive reaction to applied dynein and b-tubulin antibodies characterized the area of the cilia-like structures. We propose that reduced back-and-forth movements of the cilia-like structures might contribute to the flow of the fluid content inside the notochord, thus modulating the stiffness of the amphioxus body during its undulatory locomotion.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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