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Molecular mechanisms of zinc uptake and translocation in rice

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Abstract

Background

Zinc (Zn) is an essential micronutrient for plants and humans, involved in protein, nucleic acid, carbohydrate, and lipid metabolism. In addition, Zn is critical to the control of gene transcription and the coordination of other biological processes.

Scope

Zn deficiency is one of the most serious problems in plant and human nutrition. Like other plants, rice plant acquires Zn from soil and transports it to vegetative tissue as well as seed through a number of transporters which are strictly regulated. Several members of the Zn-regulated transporters and iron (Fe)-regulated transporter-like protein (ZIP) gene family have been characterized and shown to be involved in metal uptake and transport in rice. The most characterized members of this family in rice are OsZIP1, OsZIP3, OsZIP4, OsZIP5, and OsZIP8, however little is known about the expression of these genes through different growth stages of rice.

Conclusion

Here we discuss the molecular mechanisms of Zn transport in rice as an essential advance for understanding and manipulating the Zn absorption and translocation in rice. OsZIP1 and OsZIP3 seems important for Zn uptake from soil, OsZIP4, OsZIP5 and OsZIP8 for root to shoot translocation, while OsZIP4 and OsZIP8 seems particularly important for Zn transport to seed.

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Abbreviations

Zn::

Zinc

ZIP::

Zn-regulated transporters and Iron (Fe) regulated transporter like protein

YSL:

yellow stripe 1 like

NA:

nicotianamine

DMA:

2′-Deoxymugineic acid

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Acknowledgments

This study was supported by a grant from the Ministry of Agriculture, Forestry and Fisheries of Japan (Green Technology Project IP-5003). We thank Dr. Tomoko Nozoye and Dr. Motofumi Suzuki for valuable discussion.

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Authors and Affiliations

  1. Laboratory of Plant Biotechnology, Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan

    Khurram Bashir & Naoko K. Nishizawa

  2. Faculty of Science, Graduate School of Science, Tohoku University, 6-3 Aramakiaza-aoba, Aoba-ku, Sendai, Miyagi, 980-8578, Japan

    Yasuhiro Ishimaru

  3. Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi-shi, Ishikawa, 921-8836, Japan

    Naoko K. Nishizawa

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  1. Khurram Bashir
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Correspondence to Naoko K. Nishizawa.

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Bashir, K., Ishimaru, Y. & Nishizawa, N.K. Molecular mechanisms of zinc uptake and translocation in rice. Plant Soil 361, 189–201 (2012). https://doi.org/10.1007/s11104-012-1240-5

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