Photopolarization of Fucus zygotes is determined by time sensitive vectorial addition of environmental cues during axis amplification

• DOI: 10.3389/fpls.2015.00026
• Publication Date: 2015-02-03T14:14:20Z
• Authors: Kenny A. Bogaert; Tom Beeckman; Olivier De Clerck
• Keywords: Cell polarity

Fucoid zygotes have been extensively used to study cell polarization and asymmetrical division. Fertilized eggs are responsive different environmental cues (e.g. light, gravity) for a long period before the polarity is fixed cells germinate accordingly. First, it commonly believed that direction sense of vector established simultaneously as indicated by formation an F-actin patch. Secondly, upon reorientation zygote, new polar gradient formed assumed position future rhizoid pole only influenced latter. Here we tested these two hypotheses investigating photopolarization in Fucus reorienting 90° relative unilateral light source at time points during first cycle. We conclude fixation indeed simultaneously. However, experiments yielded distribution axes cannot be explained if last cue supposed determine axis. our observations, together with published findings, can assuming imprinting vectors their integration vectorial sum moment axis fixation. This way will average serially perceived resulting representative dynamic intertidal environment, instead betting exclusively on