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Sci. Signal., 6 October 2009
Vol. 2, Issue 91, p. ra61
[DOI: 10.1126/scisignal.2000333]


Coordinated Responses to Oxygen and Sugar Deficiency Allow Rice Seedlings to Tolerate Flooding

Kuo-Wei Lee1,6, Peng-Wen Chen2, Chung-An Lu3, Shu Chen4, Tuan-Hua David Ho5, and Su-May Yu6*

1 Graduate Institute of Life Sciences, National Defense Medical Center, Neihu, Taipei 114, Taiwan, ROC.
2 Institute of Agricultural Biotechnology, National Chiayi University, Chiayi City 600, Taiwan, ROC.
3 Department of Life Sciences, National Central University, Jhongli City, Taoyuan County 320, Taiwan, ROC.
4 Taiwan Agricultural Research Institute, Wufeng, Taichung 413, Taiwan, ROC.
5 Institute of Plant and Microbial Biology, Academia Sinica, Nankang, Taipei 115, Taiwan, ROC.
6 Institute of Molecular Biology, Academia Sinica, Nankang, Taipei 115, Taiwan, ROC.

Abstract: Flooding is a widespread natural disaster that leads to oxygen (O2) and energy deficiency in terrestrial plants, thereby reducing their productivity. Rice is unusually tolerant to flooding, but the underlying mechanism for this tolerance has remained elusive. Here, we show that protein kinase CIPK15 [calcineurin B–like (CBL)–interacting protein kinase] plays a key role in O2-deficiency tolerance in rice. CIPK15 regulates the plant global energy and stress sensor SnRK1A (Snf1-related protein kinase 1) and links O2-deficiency signals to the SnRK1-dependent sugar-sensing cascade to regulate sugar and energy production and to enable rice growth under floodwater. Our studies contribute to understanding how rice grows under the conditions of O2 deficiency necessary for growing rice in irrigated lowlands.

* To whom correspondence should be addressed. E-mail: sumay{at}

Citation: K.-W. Lee, P.-W. Chen, C.-A. Lu, S. Chen, T.-H. D. Ho, S.-M. Yu, Coordinated Responses to Oxygen and Sugar Deficiency Allow Rice Seedlings to Tolerate Flooding. Sci. Signal. 2, ra61 (2009).

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