CO2 regulator SLAC1 and its homologues are essential for anion homeostasis in plant cells

Juntaro Negi, Osamu Matsuda, Takashi Nagasawa, Yasuhiro Oba, Hideyuki Takahashi, Maki Kawai-Yamada, Hirofumi Uchimiya, Mimi Hashimoto and Koh Iba ()
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Juntaro Negi: Faculty of Sciences, Kyushu University
Osamu Matsuda: Faculty of Sciences, Kyushu University
Takashi Nagasawa: Faculty of Sciences, Kyushu University
Yasuhiro Oba: Faculty of Sciences, Kyushu University
Hideyuki Takahashi: Iwate Biotechnology Center, Kitakami, Iwate 024-0003, Japan
Maki Kawai-Yamada: Institute of Molecular and Cellular Biosciences, The University of Tokyo
Hirofumi Uchimiya: Iwate Biotechnology Center, Kitakami, Iwate 024-0003, Japan
Mimi Hashimoto: Faculty of Sciences, Kyushu University
Koh Iba: Faculty of Sciences, Kyushu University

Nature, 2008, vol. 452, issue 7186, 483-486

Abstract: A stomatal ion channel The stomata on the undersides of leaves control the exchange of carbon dioxide and water between plants and the atmosphere. Stomatal pore aperture is regulated by transport of ions and metabolites across guard-cell membranes. Perhaps surprisingly, until now no plant plasma membrane anion channel subunits have been cloned — and the homologues of animal anion channels have been shown not to encode functional ion channels in plants. Now two groups working independently have identified a protein that is an essential component for S-type anion channel function and is required for stomatal closure in response to a variety of physiological and stress stimuli. Termed SLAC1, it is a distant homologue of fungal and bacterial dicarboxylate/malic acid transport proteins.

Date: 2008
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DOI: 10.1038/nature06720

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