Plant and Soil

, Volume 307, Issue 1–2, pp 21–27 | Cite as

Reexamination of silicon effects on rice growth and production under field conditions using a low silicon mutant

Regular Article

Abstract

Silicon (Si) is a beneficial element for healthy growth and high and sustainable production of rice, but the mode of action of the beneficial effects has not been well understood. We carried out field trials for four years at two different locations to re-examine the effects of Si on the growth and production of rice using a low silicon rice (lsi1) mutant. The mutant accumulated much lower Si at each growth stage compared with the wild-type rice (Oryza sativa L. cv Oochikara), but there was no difference in the accumulation of other nutrients including N, P, and K. Measurements at different growth stages showed that low Si in the mutant hardly affected the tiller number, chlorophyll content (SPAD value), and root growth. The plant height and shoot dry weight of the wild-type rice were slightly higher than those of the mutant at a later growth stage, but the difference was not significant between the two lines. However, grain yield was reduced by 79–98%, depending on year, due to a low Si accumulation in the mutant, which showed the largest effect of Si on rice production among all studies reported so far. Among the yield components, the percentage of filled spikelets was mostly affected, being only 13.9% of the wild-type rice in the mutant. The grain color of the mutant became brown because of excessive transpiration and infection of pathogens. These results indicate that Si increases rice yield mainly by enhancing the fertility of spikelets.

Keywords

Field Growth Mutant Production Rice Silicon Stress 

References

  1. Datnoff LE, Rodrigues FÁ (2005) The role of silicon in suppressing rice diseases. APSnet Features February 2005Google Scholar
  2. Epstein E (1994) The anomaly of silicon in plant biology. Proc Natl Acad Sci U S A 91:11–17PubMedCrossRefGoogle Scholar
  3. Epstein E (1999) Silicon. Annu Rev Plant Physiol 50:641–664CrossRefGoogle Scholar
  4. Fauteux F, Remus-Borel W, Menzies JG, Belanger RR (2005) Silicon and plant disease resistance against pathogenic fungi. FEMS Microbiol Lett 249:1–6PubMedCrossRefGoogle Scholar
  5. Ma JF (2004) Role of silicon in enhancing the resistance of plants to biotic and abiotic stresses. Soil Sci Plant Nutr 50:11–18Google Scholar
  6. Ma JF, Takahashi E (2002) Soil, Fertilizer, and Plant Silicon Research in Japan. Elsevier Science, AmsterdamGoogle Scholar
  7. Ma JF, Yamaji N (2006) Silicon uptake and accumulation in higher plants. Trend Plant Sci 11:392–397CrossRefGoogle Scholar
  8. Ma JF, Nishimura K, Takahashi E (1989) Effect of silicon on the growth of rice plant at different growth stages. Soil Sci Plant Nutr 35:347–356Google Scholar
  9. Ma JF, Goto S, Tamai K, Ichii M (2001) Role of root hairs and lateral roots in silicon uptake by rice. Plant Physiol 127:1773–1780PubMedCrossRefGoogle Scholar
  10. Ma JF, Tamai K, Ichii M, Wu GF (2002) A rice mutant defective in Si uptake. Plant Physiol 130:2111–2117PubMedCrossRefGoogle Scholar
  11. 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 440:688–691PubMedCrossRefGoogle Scholar
  12. Ma JF, Yamaji N, Mitani N, Tamai K, Konishi S, Fujiwara T, Katsuhara M, Yano M (2007) An effulux transporter of silicon in rice. Nature 448:209–212PubMedCrossRefGoogle Scholar
  13. Sasamoto K (1958) Studies on the relation between the silica content in the rice plant and the insect pests. Part 6. Jpn J Appl Entomol Z 2:88–92Google Scholar
  14. Savant NK, Snyder GH, Datnoff LE (1997) Silicon management and sustainable rice production. Adv Agron 58:151–199CrossRefGoogle Scholar
  15. Seo W, Ota Y (1982) Role of the hull in the ripening of the rice plant. Part 5. Water loss in hull and development of rice kernel. Jpn J Corp Sci 51:529–534Google Scholar
  16. Takahashi E, Hino K (1978) Silica uptake by plant with special reference to the forms of dissolved silica. J Sci Soil Mature Jpn 49:357–360Google Scholar
  17. Takahashi E, Arai K, Kashida Y (1966) Studies on the physiological role of silicon in corp plant. Part 14. J Sci Soil Mature Jpn 37:594–598Google Scholar
  18. Yoshida S (1965) Chemical aspect of silicon in physiology of the rice plant. Bull Natl Agric Sci B 15:1–58Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Research Institute for BioresourcesOkayama UniversityKurashikiJapan

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