Function of silica bodies in the epidermal system of rice (Oryza sativa L.): Testing the window hypothesis

Sakae Agarie, Waichi Agata, Hideki Uchida, Fumitake Kubota, Peter B. Kaufman

研究成果: ジャーナルへの寄稿学術誌査読

51 被引用数 (Scopus)

抄録

Silicon has been considered to be important for normal growth and development of the rice plant (Oryza sativa L.). To investigate the physiological function of deposited silica in rice leaves, the hypothesis that silica bodies in the leaf epidermal system might act as a 'window' to facilitate the transmission of light to photosynthetic mesophyll tissue was tested. The silica content of leaves increased with supplied silicon and was closely correlated with the number of silica bodies per unit leaf area in the epidermal system. There was a significant difference in silica deposition and formation of silica bodies between Si-treated and non-treated leaves; silicon was polymerized inside the silica cells and bulliform cells of the epidermis, in Si-treated leaves. Although the 'windows' were only formed in leaves with applied silicon, optical properties of leaf transmittance, reflectance and absorptance spectra in Si-treated and non-treated leaves were almost equal. Furthermore, light energy use efficiency and quantum yield of Si-treated leaves were less than in leaves not containing silica bodies. Thus, silica bodies, at least based on the data, do not function as windows in rice leaves.

本文言語英語
ページ(範囲)655-660
ページ数6
ジャーナルJournal of Experimental Botany
47
298
DOI
出版ステータス出版済み - 5月 1996

!!!All Science Journal Classification (ASJC) codes

  • 生理学
  • 植物科学

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