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Plant Biol (Stuttg) 2000; 2(2): 176-181
DOI: 10.1055/s-2000-9154
Original Paper
Georg Thieme Verlag Stuttgart ·New York

Cytoskeletal Drugs and Gravity-Induced Lateral Auxin Transport in Rice Coleoptiles

R. Godbolé, W. Michalke, P. Nick 1 , and R. Hertel
  • Institut für Biologie III and 1II, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
Further Information

Publication History

November 10, 1999

November 23, 1999

Publication Date:
31 December 2000 (online)

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Abstract:

Gravity-induced events such as amyloplast sedimentation and lateral auxin transport were probed with cytoskeletal drugs in coleoptiles of rice (Oryza sativa L.). Amyloplast sedimentation was retarded by taxol. Lateral transport of auxin (3H-indoleacetic acid) was strongly inhibited by EPC (ethyl N-phenylcarbamate), but only partially inhibited by taxol. 1 mM EPC reduced gravitropism while phototropism was not affected. The findings suggest that microtubules may transduce pressure or proximity of amyloplasts to the auxin exporter in the plasmalemma.

Key words:

Amyloplasts - cytoskeletal drugs - gravitropism - lateral auxin transport - microtubules - rice (Oryza sativa L.)

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R. Hertel

Institut für Biologie III and II Albert-Ludwigs-Universität Freiburg

Schänzlestr. 1

79104 Freiburg

Germany

Section Editor: M. Koornneef

Email: hertel@uni-freiburg.de

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