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Article Addendum

Feedback control of reactive oxygen and Ca²⁺ signalling during brown algal embryogenesis

Susana M.B. Coelho, Colin Brownlee and John H.F. Bothwell

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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.

Authors

Susana M.B. Coelho

UMR7139; Station Biologique; Centre National de la Recherche Scientifique; Université Pierre & Marie Curie Paris VI; Roscoff, France

Colin Brownlee

Marine Biological Association of the UK; The Laboratory; Plymouth, United Kingdom

John H.F. Bothwell

Marine Biological Association of the UK; The Laboratory; Plymouth, United Kingdom

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