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Plant and Cell Physiology Advance Access published online on November 8, 2007
Plant and Cell Physiology, doi:10.1093/pcp/pcm154
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© The Author 2007. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

Gain-of-function phenotypes of chemically synthetic CLAVATA3/ESR-related (CLE) peptides in Arabidopsis thaliana and Oryza sativa.

Atsuko Kinoshita1, Yasukazu Nakamura2, Erika Sasaki3, Junko Kyozuka3, Hiroo Fukuda1 and Shinichiro Sawa1,*

1University of Tokyo, Graduate School of Science, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
2Laboratory of Plant Genome Informatics, Kazusa DNA Research Institute, Kisarazu, Chiba, 292-0818, Japan
3University of Tokyo, Graduate School of Agricultural and Life Sciences, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-0033, Japan

Address correspondence to: Dr. Shinichiro Sawa, Department of Biological Sciences, Graduate school of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan, Phone; +81-3-5841-4463, Fax; +81-3-5841-4462, E-mail; sawa{at}biol.s.u-tokyo.ac.jp


  Abstract

Using 26 chemically synthetic CLAVATA3/ESR (CLE) peptides, which correspond to the predicted products of the 31 Arabidopsis CLE genes, we investigated the CLE peptide function in Arabidopsis and rice. Treatment with some CLE peptides inhibited root elongation in rice as well as in Arabidopsis. It also reduced the size of the shoot apical meristem in Arabidopsis but not in rice. Database searches revealed 47 putative CLE genes in the rice genome and multiple CLE domains in some CLE genes, indicating diverse CLE function in these plants.

Keywords: CLE peptides - Arabidopsis thaliana - Oryza sativa - shoot apical meristem

(Received October 9, 2007; Accepted November 6, 2007)
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