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Plant and Cell Physiology Advance Access originally published online on March 8, 2005
Plant and Cell Physiology 2005 46(5):806-811; doi:10.1093/pcp/pci080
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JSPP © 2005

Short Communication

Expression of the Floral B-function Gene SLM2 in Female Flowers of Silene latifolia Infected with the Smut Fungus Microbotryum violaceum

Yusuke Kazama1, Ayako Koizumi, Wakana Uchida2, Amr Ageez and Shigeyuki Kawano

Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, FSB-601, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562 Japan

1 Corresponding author: E-mail, kk37505{at}mail.ecc.u-tokyo.ac.jp; Fax, +81-4-7136-3674.

Silene latifolia is a dioecious plant in which sex is determined by X and Y chromosomes. Expression of the B-function gene SLM2, an ortholog of PISTILLATA (PI) in Arabidopsis, was examined by in situ hybridization. SLM2 was not expressed in suppressed stamens of female flowers, but was expressed in developing stamens of smut-infected female flowers. These results indicate that the control of SLM2 is independent of the presence of the Y chromosome. Smut-infected females provide a useful system for clarifying the relationship between the B-function gene and the sex determination factor.

2 Present address: Molecular Membrane Biology Laboratory, RIKEN, Wako, Saitama 351-0198, Japan.

(Received December 5, 2004; Accepted February 21, 2005 )
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