Stomagen positively regulates stomatal density in Arabidopsis

Shigeo S. Sugano, Tomoo Shimada, Yu Imai, Katsuya Okawa, Atsushi Tamai, Masashi Mori and Ikuko Hara-Nishimura ()
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Shigeo S. Sugano: Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Tomoo Shimada: Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Yu Imai: Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Katsuya Okawa: Innovative Drug Research Laboratories, Kyowa Hakko Kirin Co., Ltd.
Atsushi Tamai: Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi-machi, Ishikawa 921-8836, Japan
Masashi Mori: Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi-machi, Ishikawa 921-8836, Japan
Ikuko Hara-Nishimura: Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan

Nature, 2010, vol. 463, issue 7278, 241-244

Abstract: Extra stomata in prospect As the portals through which carbon dioxide is exchanged between the epidermal leaf tissue of plants and the atmosphere, the stomata are key elements in plant physiology. As such they are the focus of genetic and environmental regulation in plants, but until now no positive signalling factor of stomata development has been identified. Now a protein with stomata-inducing properties has been identified in Arabidopsis. Termed stomagen, it is a cysteine-rich peptide found in the inner tissue (mesophyll) layers of young leaves where it initiates the stomatal lineage possibly by binding to the cell-surface receptor TMM. This discovery raises the prospect that stomagen might be used to develop crops and trees with high stomatal densities and hence high absorption capacity for CO2, not only by genetic engineering, but also by spraying with synthetic stomagen or related synthetic peptides.

Date: 2010
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DOI: 10.1038/nature08682

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