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The experiments were financially supported by the Bundesminister für Forschung und Technologie, Bonn.
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Volkmann, D., Behrens, H.M. & Sievers, A. Development and gravity sensing of cress roots under microgravity. Naturwissenschaften 73, 438–441 (1986). https://doi.org/10.1007/BF00367291
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DOI: https://doi.org/10.1007/BF00367291