... form of programmed cell death, apoptosis, to one of the oldest, most basic, and most radical developmental processes, the metamorphosis of the marine hydrozoon Hydractinia echinata . Apoptosis, represented by DNA fragmentation, appears very early during metamorphosis, approximately 20 minutes post...

... and in basal parts of primary polyps. Tentacles and stolon tips are always free of replicating cells. © 1988 by Company of Biologists 1988 proliferation kinetics metamorphosis Hydractinia echinata cell proliferation Hydroids often are chosen as model organisms for studies that are aimed...

...G. Plickert; M. Kroiher S-phase cells in intact animals of the coelenterate species Eirene viridula, Hydractinia echinata, Hydra attenuate , and Hydra magnipapillata incorporate the thymidine analogue bromodeoxyuridine (BrdU) into newly synthesized DNA. BrdU-labelled nuclei divide and cells appear...