Plant and Cell Physiology Advance Access originally published online on May 15, 2007
Plant and Cell Physiology 2007 48(6):892-896; doi:10.1093/pcp/pcm057
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Short Communication |
Phototropins and Neochrome1 Mediate Nuclear Movement in the Fern Adiantum capillus-veneris
1Division of Photobiology, National Institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki, Aichi, 444-8585 Japan
2Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University,1-1 Minamiosawa, Hachioji, Tokyo, 192-0397 Japan
*Corresponding author: E-mail, wada{at}nibb.ac.jp; Fax, +81-564-55-7611.
| Abstract |
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In gametophytic cells (prothalli) of the fern Adiantum capillus-veneris, nuclei as well as chloroplasts change their position according to light conditions. Nuclei reside on anticlinal walls in darkness and move to periclinal or anticlinal walls under weak or strong light conditions, respectively. Here we reveal that red light-induced nuclear movement is mediated by neochrome1 (neo1), blue light-induced movement is redundantly mediated by neo1, phototropin2 (phot2) and possibly phot1, and dark positioning of both nuclei and chloroplasts is mediated by phot2. Thus, both the nuclear and chloroplast photorelocation movements share common photoreceptor systems.
Keywords: Adiantum capillus-veneris - Chloroplast movement - Fern - Neochrome - Nuclear movement - Phototropin
Abbreviations: A, anticlinal; DAPI, 4',6-diamidino-2-phenylindole; EMS, ethylmethane sulfonate; neo, neochrome; P, periclinal; phot, phototropin.
3Present address: Nishii Initiative Research Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
(Received April 10, 2007; Accepted May 7, 2007)
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