Wavelet analysis highlights multi-timescale modes of morphogenesis.
a) Scalogram resulting from the ricker wavelet transform applied to f00(t) over the whole period covered by the dataset t ∈ [4, 8.6] hpf. b) Scalogram resulting from the ricker wavelet transform applied to f00(t) restricted to the gastrulation period t ∈ [4, 6.3] hpf. The high frequency events highlighted hererepresent time points of synchronized division across the embryo. The dark band in the middle separating two large red regions indicates that there are two phases of invagination characterized by large deformations and a relatively calm transition phase in between. c) Scalogram resulting from the ricker wavelet transform applied to f10(t) restricted to the gastrulation period t ∈ [4, 6.3] hpf. Similar to b), the high frequency events indicate synchronized division in the embryo. d) Scalogram resulting from the ricker wavelet transform applied to f20(t) restricted to endoderm invagination t ∈ [4, 5.1] hpf.