Silicon deficiency promotes lignin accumulation in rice

DOI Web Site 被引用文献2件 参考文献27件
  • Suzuki Shiro
    Research Institute for Sustainable Humanosphere, Kyoto University
  • Ma Jian Feng
    Institute of Plant Science and Resources, Okayama University
  • Yamamoto Naoki
    Research Institute for Sustainable Humanosphere, Kyoto University
  • Hattori Takefumi
    Research Institute for Sustainable Humanosphere, Kyoto University
  • Sakamoto Masahiro
    Graduate School of Agriculture, Kyoto University
  • Umezawa Toshiaki
    Research Institute for Sustainable Humanosphere, Kyoto University Institute of Sustainability Science, Kyoto University

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Although both lignin and silica accumulate on cell walls and confer rigidity, mechanical strength, and resistance to pathogen invasion in rice, it remains unclear whether silicon deficiency affects lignin accumulation. We demonstrate that low silicon rice mutated in a silicon influx transporter, Lsi1, or a silicon efflux transporter, Lsi2, contained larger amounts of lignin in the rice straws. Furthermore, wild-type rice cultivated on low silicon media also accumulated larger amounts of lignin in shoots. Significant accumulation of guaiacyl lignin upon silicon deficiency was determined by nitrobenzene oxidation analysis. These data indicate a negative correlation between silicon accumulation and lignin deposition.

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