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JXB Advance Access published online on October 1, 2008
Journal of Experimental Botany, doi:10.1093/jxb/ern250
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© The Author [2008]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

RESEARCH PAPER

A novel, cellulose synthesis inhibitory action of ancymidol impairs plant cell expansion

Jana Hofmannová1, Katerina Schwarzerová1,*, Lenka Havelková1, Petra Boríková1, Jan Petrásek1,2 and Zdenek Opatrny1

1Department of Plant Physiology, Faculty of Science, Charles University Prague, Vinicná 5, Prague 128 44, Czech Republic
2Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Rozvojová 263, Prague 165 02, Czech Republic

* To whom correspondence should be addressed: E-mail: schwarze{at}natur.cuni.cz

The co-ordination of cell wall synthesis with plant cell expansion is an important topic of contemporary plant biology research. In studies of cell wall synthesis pathways, cellulose synthesis inhibitors are broadly used. It is demonstrated here that ancymidol, known as a plant growth retardant primarily affecting gibberellin biosynthesis, is also capable of inhibiting cellulose synthesis. Its ability to inhibit cellulose synthesis is not related to its anti-gibberellin action and possesses some unique features never previously observed when conventional cellulose synthesis inhibitors were used. It is suggested that ancymidol targets the cell wall synthesis pathway at a regulatory step where cell wall synthesis and cell expansion are coupled. The elucidation of the ancymidol target in plant cells could potentially contribute to our understanding of cell wall synthesis and cell expansion control.

Key words: Ancymidol, cell expansion, cell wall, cellulose synthesis, 2,6-dichlorobenzonitrile, gibberellin, isoxaben, microtubules, vesicle trafficking

Received 7 August 2008; Accepted 26 August 2008


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