オリゴ糖エリシターおよびその受容体を介した植物生体防御機構の調節

  • Yamaguchi Takeshi
    Department of Biotechnology, National Institute of Agrobiological Resources, Ministry of Agriculture, Forestry and Fisheries
  • Ito Yuki
    Department of Biotechnology, National Institute of Agrobiological Resources, Ministry of Agriculture, Forestry and Fisheries
  • Shibuya Naoto
    Department of Biotechnology, National Institute of Agrobiological Resources, Ministry of Agriculture, Forestry and Fisheries

書誌事項

タイトル別名
  • Oligosaccharide Elicitors and Their Receptors for Plant Defense Responses.
  • ミニレビュー オリゴトウ エリシター オヨビ ソノ ジュヨウタイ オ カイシタ ショクブツ セイタイ ボウギョ キコウ ノ チョウセツ ガン エイゴ ゲンブン

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抄録

N-Acetylchitooligosaccharides (oligochitin, chitin oligosaccharides) of a specific size can act as potent elicitor signals for suspension-cultured rice cells as well as various plant cells which include many monocots and some dicots. We recently isolated and characterized a highly elicitor-active glucopentaose from the cell wall β-Glucan from rice blast disease fungus. The results indicated that rice and soybean cells recognize different structural units of fugal glucans as elicitor signals. Because this elicitor treatment can induce many defense reactions, it has been serving as an excellent model system for the study of the signal transduction cascade leading to the activation of defense-related genes. It is critically important to identify and characterize the receptor molecules which perceive the elicitor signal to clarify the whole signal transduction cascade. A 75kDa chitin oligosaccharide binding protein in the plasma membrane of suspension-cultured rice cells was identified as a putative receptor for the elicitor and purified. Recent studies on the structure and function of the binding proteins for these oligosaccharide elicitors will provide a clue to understanding how these elicitors are perceived and transduced in rice and other plant cells and also how such recognition systems have evolved.

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