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JXB Advance Access originally published online on January 23, 2009
Journal of Experimental Botany 2009 60(5):1427-1438; doi:10.1093/jxb/ern303
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© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

This article appears in the following Journal of Experimental Botany issue: Special Issue: Perspectives on Plant Development [View the issue table of contents]

REVIEW-ARTICLE

Molecular regulators of phosphate homeostasis in plants

Wei-Yi Lin1,2,3 *, Shu-I Lin1,4 * and Tzyy-Jen Chiou1,2,3,4,{dagger}

1Agricultural Biotechnology Research Center, Academia Sinica, Taipei 115, Taiwan, ROC
2Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan, ROC
3Department of Life Sciences, National Chung-Hsing University, Taichung 402, Taiwan, ROC
4Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan, ROC

{dagger} To whom correspondence should be addressed: E-mail: tjchiou{at}gate.sinica.edu.tw

An appropriate cellular phosphate (Pi) concentration is indispensable for essential physiological and biochemical processes. To maintain cellular Pi homeostasis, plants have developed a series of adaptive responses to facilitate external Pi acquisition and to limit Pi consumption and to adjust Pi recycling internally when the Pi supply is inadequate. Over the past decade, significant progress has been made toward understanding such regulation at the molecular level. In this review, the focus is on the molecular regulators that mediate cellular Pi concentrations. The regulators are introduced and organized according to their original identification procedures, by the forward genetic approach of mutant screening or by reverse genetic analysis. These genes are involved in Pi uptake, allocation or remobilization or are upstream regulators, such as transcriptional factors or signalling molecules. In the future, integration of current knowledge and exploration of new technology is expected to offer new insights into molecular mechanisms that maintain Pi homeostasis.

Key words: Phosphorus, phosphate homeostasis, forward genetics, reverse genetics

* These authors contributed equally to this work.

Received 1 September 2008; Revised 5 November 2008 Accepted 10 November 2008


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