C. Brownlee et Fy. Bouget, POLARITY DETERMINATION IN FUCUS - FROM ZYGOTE TO MULTICELLULAR EMBRYO, SEMINARS IN CELL & DEVELOPMENTAL BIOLOGY, 9(2), 1998, pp. 179-185
Zygotes of fucoid algae acquire polarity de novo. The initial polarity
establishes the apical-basal polarity of the multicellular embryo and
the adult plant. Acquisition of polarity involves the translation of
external vectorial signals into spatial information within the cell vi
a spatial photoreceptor activation at the level of the plasma membrane
. Fixation of the polar axis involves interactions between the cytoske
leton, plasma membrane and the cell wall. Recently a central role for
targeted secretion in polar axis fixation has been identified. In the
multicellular embryo, evidence is accumulating for roles of cell wall
and intercellular communication via diffusible signals in pattern form
ation and control of cell fate.