Direct control of shoot meristem activity by a cytokinin-activating enzyme

Takashi Kurakawa, Nanae Ueda, Masahiko Maekawa, Kaoru Kobayashi, Mikiko Kojima, Yasuo Nagato, Hitoshi Sakakibara () and Junko Kyozuka ()
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Takashi Kurakawa: University of Tokyo
Nanae Ueda: RIKEN Plant Science Center
Masahiko Maekawa: Okayama University
Kaoru Kobayashi: University of Tokyo
Mikiko Kojima: RIKEN Plant Science Center
Yasuo Nagato: University of Tokyo
Hitoshi Sakakibara: RIKEN Plant Science Center
Junko Kyozuka: University of Tokyo

Nature, 2007, vol. 445, issue 7128, 652-655

Abstract: Makes shoots and leaves The plant hormone cytokinin is required for the activity of the shoot meristem, a prerequisite for the continuous growth of higher plants. Kurakawa et al. report that fine-tuning of cytokinin activity by a novel cytokinin activating enzyme is crucial for the control of the meristem activity. The enzyme, encoded by the LONELY GUY (LOG) gene, catalyses the final step in the synthesis of bioactive cytokinin. Cell-specific conversion of the inactive form to the active form where cytokinin action is required may be an efficient mechanism for preventing cytokinin action in tissues or at times when it is not needed.

Date: 2007
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DOI: 10.1038/nature05504

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