SCC-1/COH-2 and COH-1 play distinct roles in development. (A and B)
SCC-1/COH-2 is required for mitotic division throughout development. Depletion
of SCC-1/COH-2 in embryos resulted in embryonic lethality. A terminally
arrested embryo is shown in A. When the function of SCC-1/COH-2 was depleted
postembryonically, some worms exhibited abnormal morphology of the vulva (B).
(C–E) COH-1 is essential for larval development and the egg-laying
ability. Some coh-1(RNAi) F1 progeny arrested as L1 larvae (C). When
the function of COH-1 was disrupted in L1 worms by RNAi by soaking,
coh-1(RNAi) adults showed an egg-laying defect, accumulating more
eggs in the gonad (D) than wild-type hermaphrodites (E). Bar, 10 μm (A and
C), 20 μm (B), and 20 μm (D and E).