title: Feedback control of reactive oxygen and Ca signaling during brown algal embryogenesis.
abstract: In a recent paper in Planta, we combined novel confocal reflectance imaging of intracellular reactive oxygen species (ROS) with inhibition-of-growth experiments to show that ROS help to direct polarized growth in brown algal zygotes. Using confocal fluorescence imaging of intracellular Ca(2+) distributions, we were also able to show an interaction between ROS and Ca(2+) signaling. The modulation of intracellular Ca(2+) signals by reactive oxygen species (ROS) is a common motif in many plant and algal systems, but our Planta paper is its first demonstration during early development. We explain here how our findings complement a number of recent studies on polarized growth in plant and algal systems.
authors.affiliation: UMR7139; Station Biologique; Centre National de la Recherche Scientifique; Université Pierre & Marie Curie Paris VI; Roscoff, France.
authors.forename: Susana Mb
authors.initials: SM
authors.lastname: Coelho
authors.forename: Colin
authors.initials: C
authors.lastname: Brownlee
authors.forename: John Hf
authors.initials: JH
authors.lastname: Bothwell
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