Encyclopedia of Metalloproteins

2013 Edition
| Editors: Robert H. Kretsinger, Vladimir N. Uversky, Eugene A. Permyakov

Silicon Transporters

Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-1533-6_494



Plants accumulate silicon in the tissues for enhancing tolerance to various stresses. Different transporters are involved in the uptake, xylem loading, and distribution of silicon, including influx transporter and efflux transporter. Influx transporter belongs to a Nod26-like major intrinsic protein (NIP) subfamily of aquaporin-like proteins, while efflux transporter is a member of putative anion transporters.


Silicon (Si) is the second most abundant element after oxygen in the Earth’s crust. It is essential for animals and diatoms, but has not been recognized as an essential element for plant growth, because there is no evidence showing that Si is involved in the metabolism, which is required for the essentiality in higher plants (Epstein 1999; Ma and Takahashi 2002; Ma et al. 2011). However, beneficial effects of Si have been observed in a wide range of...

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  1. Chiba Y, Mitani N, Yamaji N, Ma JF (2009) HvLsi1 is a silicon influx transporter in barley. Plant J 57:810–818CrossRefPubMedGoogle Scholar
  2. Epstein E (1999) Silicon. Annu Rev Plant Physiol Plant Mol Biol 50:641–664CrossRefPubMedGoogle Scholar
  3. Ma JF (2004) Role of silicon in enhancing the resistance of plants to biotic and abiotic stresses. Soil Sci Plant Nutr 50:11–18CrossRefGoogle Scholar
  4. Ma JF, Takahashi E (2002) Soil, fertilizer, and plant silicon research in Japan. Elsevier, AmsterdamGoogle Scholar
  5. Ma JF, Yamaji N (2006) Silicon uptake and accumulation in higher plants. Trends Plant Sci 11:392–397CrossRefPubMedGoogle Scholar
  6. Ma JF, Tamai K, Yamaji N, Mitani N, Konishi S, Katsuhara M, Ishiguro M, Murata Y, Yano M (2006) A silicon transporter in rice. Nature 440:688–691CrossRefPubMedGoogle Scholar
  7. Ma JF, Yamaji N, Mitani N, Tamai K, Konishi S, Fujiwara T, Katsuhara M, Yano M (2007) An efflux transporter of silicon in rice. Nature 448:209–212CrossRefPubMedGoogle Scholar
  8. Ma JF, Yamaji N, Mitani N, Xu XY, Su YH, McGrath S, Zhao FJ (2008) Transporters of arsenite in rice and their role in arsenic accumulation in rice grain. Proc Natl Acad Sci USA 105:9931–9935CrossRefPubMedGoogle Scholar
  9. Ma JF, Yamaji N, Mitani-Ueno N (2011) Transport of silicon from roots to panicles in plants. Proc Jpn Acad Ser B 87:377–385CrossRefGoogle Scholar
  10. Mitani N, Yamaji N, Ma JF (2009a) Identification of maize silicon influx transporters. Plant Cell Physiol 50:5–12CrossRefPubMedGoogle Scholar
  11. Mitani N, Chiba Y, Yamaji N, Ma JF (2009b) Identification and characterization of maize and barley Lsi2-like silicon efflux transporters reveals a distinct silicon uptake system from that in rice. Plant Cell 21:2133–2142CrossRefPubMedGoogle Scholar
  12. Mitani N, Yamaji N, Ago Y, Iwasaki K, Ma JF (2011) Isolation and functional characterization of an influx silicon transporter in two pumpkin cultivars contrasting in silicon accumulation. Plant J66:231–240Google Scholar
  13. Mitani-Ueno N, Yamaji N, Zhao FJ, Ma JF (2011) Aromatic/arginine selectivity filter of NIP aquaporins plays a critical role in substrate selectivity for silicon, boron and arsenic. J Exp Bot 62:4391–4398CrossRefPubMedGoogle Scholar
  14. Montpetit J, Vivancos J, Mitani-Ueno N, Yamaji N, Rémus-Borel W, Belzile F, Ma JF, Bélanger RR (2012) Cloning, functional characterization and heterologous expression of TaLsi1, a wheat silicon transporter gene. Plant Mol Biol 79:35–46CrossRefPubMedGoogle Scholar
  15. Yamaji N, Ma JF (2007) Spatial distribution and temporal variation of the rice silicon transporter Lsi1. Plant Physiol 143:1306–1313CrossRefPubMedGoogle Scholar
  16. Yamaji N, Ma JF (2009) Silicon transporter Lsi6 at the node is responsible for inter-vascular transfer of silicon in rice. Plant Cell 21:2878–2883CrossRefPubMedGoogle Scholar
  17. Yamaji N, Mitani N, Ma JF (2008) A transporter regulating silicon distribution in rice shoots. Plant Cell 20:1381–1389CrossRefPubMedGoogle Scholar
  18. Zhao XQ, Mitani N, Yamaji N, Shen RF, Ma JF (2010) Involvement of silicon influx transporter OsNIP2;1 in selenite uptake in rice. Plant Physiol 153:1871–1877CrossRefPubMedGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Plant Stress Physiology GroupInstitute of Plant Science and Resources, Okayama UniversityKurashikiJapan