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Plant and Cell Physiology Advance Access originally published online on May 13, 2006
Plant and Cell Physiology 2006 47(7):1004-1009; doi:10.1093/pcp/pcj055
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© The Author 2006. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Short Communication

n-Butanol induces depolymerization of microtubules in vivo and in vitro

Ai Hirase1, Takahiro Hamada1, Tomohiko J. Itoh2, Teruo Shimmen1 and Seiji Sonobe1,*

1 Graduate School of Life Science, University of Hyogo, Japan
2 Graduate School of Life Science, Nagoya University, Japan

* Corresponding author: E-mail, sonobe{at}sci.u-hyogo.ac.jp; Fax, +81-791-58-0175.

The effects of butanol on microtubules (MTs) were examined by immunofluorescence microscopy. Fragmentation of cortical MTs was induced by n-butanol, but not by s- and t-butanols, in cultured tobacco BY-2 cells. Taxol prevented n-butanol-induced MT fragmentation. Fragmented cortical MTs were still attached to the inner face of the plasma membrane when n-butanol-treated protoplasts were ruptured on the slide glass. Moreover, MTs were depolymerized in the presence of n-butanol in vitro. Therefore, n-butanol is not only an activator of phospholipase D but also an effective MT-depolymerizing agent.

(Received August 30, 2005; Accepted April 28, 2006)
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