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Plant and Cell Physiology 2004 45(9):1342-1345; doi:10.1093/pcp/pch154
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© 2004 Oxford University Press

Short Communication

The Motility of Chara corallina Myosin was Inhibited Reversibly by 2,3-Butanedione Monoxime (BDM)

Keisuke Funaki, Ayumi Nagata, Youka Akimoto, Kiyo Shimada, Kohji Ito and Keiichi Yamamoto1

Department of Biology, Chiba University, Inage-ku, Chiba, 263-8522 Japan

Abstract

We studied the effects of 2,3-butanedione monoxime (BDM) on the cytoplasmic streaming of Chara corallina and on the motility of myosin prepared from the same plant to examine whether this reagent really affects the plant class XI myosin. It was found that BDM inhibited both cytoplasmic streaming and the motility of myosin at a very similar concentration range (10–100 mM). BDM introduced directly into tonoplast-free cells also inhibited cytoplasmic streaming. These results suggested that effect of BDM on cytoplasmic streaming was exerted through myosin and not through ion channels at least in Chara corallina, though a very high concentration of BDM was required.

Footnotes

1 Corresponding author: E-mail, yamamoto{at}bio.s.chiba-u.ac.jp; Fax, +81-43-290-2809.


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