Movies

primordium migration I placode formation

Formation of the lateral line neuromasts

In zebrafish, mechanosensory organs called neuromasts (NM) are deposited at regular intervals by the migrating posterior lateral line (pLL) primordium (group of about 100 cells). The pLL primordium is organized into polarized rosettes representing proto-NM. This time-lapse movie shows that rosettes are deposited cyclically from the trailing edge of the migrating pLL primordium . Cells are labeled with memGFP (Cooper et al., 2005) and imaged at 6-minute intervals beginning at 30 hours post-fertilization. Note that rosettes are quickly renewed, as proto-NM is deposited from the trailing edge. Arrowheads indicate rosettes. Initial magnification is 140x.