DECILIATION - A STRESSFUL EVENT FOR PARACENTROTUS-LIVIDUS EMBRYOS

In this report, by using mono- and two-dimensional electrophoretic ana lysis, we demonstrate that deciliation on sea urchin embryos induces a stress response. Deciliation indeed causes not only the activation of ciliary subroutine, but also a transient decrease of bulk protein syn thesis. This decrease is in agreement with our previous results on hea t shock response in sea urchin, although deciliation does not induce t he expression of the same main hsp set. We were able to characterize o ne main deciliation-stress protein of 40 kDa whose expression is trans iently induced by deciliation and whose localisation is likely to be n uclear. (C) 1998 Academic Press.