Journal
JOURNAL OF PHYCOLOGY
Volume 46, Issue 6, Pages 1350-1355Publisher
WILEY
DOI: 10.1111/j.1529-8817.2010.00894.x
Keywords
boundary layer; brown algae; microsensor; oxygen gradients; photosynthesis; respiration
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Funding
- Nordic Academy for Advanced Study (NorFA)
- Walter and Andree de Nottbeck foundation
- Danish Natural Science Research Council
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We investigated the O-2, pH, and irradiance microenvironment in and around the tissue of the brown alga Fucus vesiculosus L. using microsensors. Microsensors are ideal tools for gaining new insights into what limits and controls macroalgal activity and growth at very fine spatial (< 100 mu m) and temporal (seconds) scales. This first microsensor investigation of a fucoid macroalga revealed differences in the microenvironment and metabolic activities at the level of different cell layers and thallus structures. F. vesiculosus responded quickly to rapid shifts in irradiance resulting in a highly dynamic microenvironment around and within its thallus. In combination with detailed morphological studies and molecular approaches, microsensors offer a promising toolbox to quantitatively describe structural and functional adaptations of macroalgae to environmental conditions, such as flow and light climate, as well as their physiological responses to environmental stressors.
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