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Action spectrum for polarotropism of the germ tube of the liverwort Sphaerocarpos Donnellii aust.

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Summary

A series of dose response curves was worked out in the polarotropically active blue and UV spectral region. These dose response curves show changes in slope as a function of wavelength. In blue the slope values are higher than in UV. As a consequence, both the relative height of the peaks in blue and UV and the fine characteristics in blue of the action spectrum calculated on the basis of these dose response curves change decisively with different response levels taken for calculation. Therefore no decision can be made as to what photoreceptor(s) might be involved. Though at medium response levels the action spectra show similarity with action spectra of other blue-UV-mediated photoresponses, which generally are believed as being indicative of some flavin.

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Authors and Affiliations

  1. Department of Botany, University of Freiburg i. Br., Freiburg i. Br., Germany

    A. M. Steiner

  2. Institut für Botanische Entwicklungsphysiologie, Universität Hohenheim, Fruwirthstr. 20, 7 Stuttgart-Hohenheim

    A. M. Steiner

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  1. A. M. Steiner
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Steiner, A.M. Action spectrum for polarotropism of the germ tube of the liverwort Sphaerocarpos Donnellii aust.. Planta 86, 343–352 (1969). https://doi.org/10.1007/BF00388960

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  • DOI: https://doi.org/10.1007/BF00388960

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