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. 2021 Feb 9;9:619596. doi: 10.3389/fcell.2021.619596

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Copyright © 2021 Kunz, Lehmann and Pohl.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Simultaneous polarization and movement of apical pores in C. elegans during embryonic elongation. (A) Maximum intensity projections of stacks of confocal images from time lapse recordings of ventral (top), left side (middle), and head-on (bottom) views of wt embryos expressing PAR-6:GFP, highlighting the anterior directed movements of the amphid, outer labial (OL), inner labial (IL), cephalic (CEP), and phasmid sensilla pores during lima bean to 1.5-fold stage. See also Supplementary Video 1. PAR-6:GFP additionally highlights pharynx, gut, rectum, and the excretory pore. In the head-on view, the anterior-most hypodermal cell is traced (hyp4, traced based on a membrane marker which is not shown for clarity). (B) Maximum intensity projections of stacks of confocal images from time lapse recordings of lateral (left side) views of a representative wt embryo expressing GFP-marked histones from lima bean to twofold stage. Movement of the XXXL, hyp5 (hypodermal cell), AMsoL (amphid socket left), AMshL (amphid sheath left), and ASEL (amphid neuron cell body) are lineaged. Images in panel (B) required time-dependent brightness adjustment due to onset and increased expression of the histone from its zygotic promoter. See also Supplementary Video 2.