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 Ca2+ distributions, we were also able to show an interaction between ROS and Ca2+ signalling. The modulation of intracellular Ca2+ 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.
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