Abstract
Pattern formation mechanisms in developing organisms determine cellular differentiation and function. However, the components that interact during the manifestation of a spatial pattern are in general unknown. Characean algae represent a model system to study pattern formation. These algae develop alternating acid and alkaline transport domains that influence the pattern of growth. In the present study, it will be demonstrated that a diffusion mechanism is implicated in acid and alkaline domain formation and this growth pattern. Experiments on the characean growth pattern were performed that resulted in pronounced, however, unpredictable modifications in the original pattern. A major component involved in this pattern-forming mechanism emerged from the nonlinear kinetics of the H+-ATPase that is located in the plasma membrane of these algae. Based on these kinetics, a mathematical model was developed and numerically analyzed. As a result, the contribution of a diffusional component to the characean acid/alkaline pattern appeared most likely.
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This work was supported by the Deutsche Forschungsgemeinschaft (grant #571 1/1) to JF.
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Fisahn, J., Lucas, W.J. Spatial organization of transport domains and subdomain formation in the plasma membrane of Chara corallina . J. Membarin Biol. 147, 275–281 (1995). https://doi.org/10.1007/BF00234525
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DOI: https://doi.org/10.1007/BF00234525