Regeneration of fin rays in teleosts: a histochemical, radioautographic, and ultrastructural study.
Regeneration followed partial amputation of the tail fin in three representative species of teleosts. A systematic study, using histochemical methods, radioautography and transmission electron microscopy, disclosed the essentials of the natural history of regeneration of the fin soft-rays. At about 24 hours, epidermal cells had completely covered the cut edge. By the second day an apical epidermal cap was established. Beneath this cap a blastema was formed by about three days after amputation. A collagenous lepidotrichial matrix had begun to develop by 4 days after excision. Actinotrichia were first detected in the regenerates at 5 days. During these processes, the basal lamina of the epidermis played an important morphogenetic role. The cells responsible for the regenerate underwent regressive changes after form and function had been restored.
Becerra
J
J
Department of Cell Biology, Faculty of Sciences, University of Málaga, Spain.
Junqueira
L C
LC
Bechara
I J
IJ
Montes
G S
GS
D000818:Animals; D001345:Autoradiography; D002347:Carps; D005399:Fishes / Q000502:physiology*; D006054:Goldfish; D008854:Microscopy, Electron; D012038:Regeneration / Q000502:physiology*; D013623:Tail / Q000033:anatomy & histology* / Q000502:physiology*; D017210:Tilapia; D013997:Time Factors