How Much Can Antioxidative Ascorbic Acid Located in the Leaf Apoplast (Cell Wall) Detoxify Ozone?—(II) Simulation with a Program using Microsoft Excel—

DOI
  • Nouchi Isamu
    Formerly, National Institute for Agro-Environmental Sciences (Present: Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization) Formerly Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Aoki Kazuyuki
    Formerly, Tokyo Metropolitan Research Institute for Environmental Protection (Present: Tokyo Metropolitan Research Institute for Environmental Protection, Tokyo Environmental Public Service Crporation)
  • Kobayashi Kazuhiko
    Graduate School of Agricultural and Life Sciences, The University of Tokyo College of Agriculture, Ibaraki University

Bibliographic Information

Other Title
  • 葉アポプラスト（細胞壁）に存在する抗酸化性アスコルビン酸はオゾンをどこまで解毒できるのか？―(II) Microsoft Excelを用いたプログラムとシミュレーション―

Abstract

<p>Following the description in the preceding paper of the mathematical model to calculate the detoxification of ozone by ascorbic acid in the apoplast (cell wall), we describe in this paper our implementation of the model using Microsoft Excel. While we collected various parameters of the model from the literature, little information was available about the resistance (ρ3) to inword ozone transport at plasmalemma (cell membrane). Therefore, we assumed two cases; i.e., “ρ3=0” and “ρ3 ≠ 0” in the calculation of the ozone detoxification. The ozone concentration ([O3]) at the plasmalemma has often been assumed to be zero, which is equivalent to the assumption, “ρ3=0”. In this case, ascorbate (ASC-) in the apoplast can detoxify ozone by 35.2%, whereas the remaining 64.8% of the ozone reaches the cytoplasmic membrane and cytosol to react with biological molecules causing subsequent damage. By comparison, the assumption, “ρ3≠0”, leads to a higher detoxification rate, e.g., 64.5% in the case of ρ3=80.18 s m-1 and ambient [O3] of 100 ppb. The detoxification rate increases as the ambient [O3] declines, which is consistent with the common notion of a threshold concentration in the ozone damages to plant tissues.</p>

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Details 詳細情報について

  • CRID
    1390001288158005888
  • NII Article ID
    130007644218
  • DOI
    10.11298/taiki.54.128
  • ISSN
    21854335
    13414178
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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