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Updated: Jan 28, 2026

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Disproval of the Starch-Amyloplast Hypothesis?
Peter Richter1, Sebastian M Strauch1, Michael Lebert1
1Department of Biology, Cell Biology Division, Gravitational Biology Group, Friedrich-Alexander-University Erlangen-Nuremberg, Staudtstrasse 5, 91058 Erlangen, Germany.
Abstract:
In a recent publication, Edelmann (Protoplasma 2018; 255,1877-1881) refuted the well-established starch-amyloplast hypothesis of gravitropism in plants. Gravitropic curvatures of shoots and roots were still present after amyloplast-containing tissues (in sheath of vascular bundles and root caps) were dissected. Here, we discuss Edelmann's data in the light of Popper's falsification principle.
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