Summary.
The role of myosins for auxin-induced cell division was probed using the inhibitor 2,3-butanedione monoxime in the tobacco cell line VBI-0, where cell elongation and division are axially aligned under the control of auxin. A morphometric analysis revealed that cell division is blocked in a dose-dependent manner, whereas cell expansion continued. In addition, the polarity of terminal cells was impaired resulting in malformed, pear-shaped cells. Early effects of the inhibitor are aberrant features of the cytoarchitecture including a block of vesicle transport, a diffuse broadening of cross walls, and the disorganization of the actin cytoskeleton. The findings are discussed with respect to a possible role of myosins as link between vesicle flow and signal control of cell division.
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Correspondence and reprints: Institut für Biologie II, Albert-Ludwigs-Universität Freiburg, Schänzlestrasse 1, 79104 Freiburg, Federal Republic of Germany.
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Holweg, C., Honsel, A. & Nick, P. A myosin inhibitor impairs auxin-induced cell division. Protoplasma 222, 193–204 (2003). https://doi.org/10.1007/s00709-003-0025-3
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DOI: https://doi.org/10.1007/s00709-003-0025-3