<i>N</i>-Cyanomethyl-2-chloroisonicotinamide Induces Systemic Acquired Resistance in<i>Arabidopsis</i>without Salicylic Acid Accumulation

  • YASUDA Michiko
    <i>Microbial Toxicology Laboratory, RIKEN Institute</i> <i>Laboratory for Growth Regulation, Plant Science Center, RIKEN Institute</i> <i>Graduate School of Science and Engineering, Saitama University</i>
  • NAKASHITA Hideo
    <i>Plant Functions Laboratory, RIKEN Institute</i> <i>Microbial Toxicology Laboratory, RIKEN Institute</i>
  • HASEGAWA Satoru
    <i>Microbial Toxicology Laboratory, RIKEN Institute</i> <i>Department of Applied Biological Chemistry, Tamagawa University</i>
  • NISHIOKA Masanori
    <i>Microbial Toxicology Laboratory, RIKEN Institute</i> <i>Biological Research Laboratories, Nissan Chemical Industries Ltd.</i>
  • ARAI Yuko
    <i>Microbial Toxicology Laboratory, RIKEN Institute</i> <i>Graduate School of Science and Engineering, Saitama University</i> Present address: <i>Polymer Chemistry Laboratory, RIKEN Institute</i>
  • URAMOTO Masakazu
    <i>Department of Applied Biological Chemistry, Tamagawa University</i>
  • YAMAGUCHI Isamu
    <i>Microbial Toxicology Laboratory, RIKEN Institute</i> <i>Graduate School of Science and Engineering, Saitama University</i> Present address: <i>Laboratory for Remediation Research, Plant Science Center, RIKEN Institute</i>
  • YOSHIDA Shigeo
    <i>Plant Functions Laboratory, RIKEN Institute</i> <i>Laboratory for Growth Regulation, Plant Science Center, RIKEN Institute</i> <i>Graduate School of Science and Engineering, Saitama University</i>

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タイトル別名
  • N-Cyanomethyl-2-chloroisonicotinamide Induces Systemic Acquired Resistance in Arabidopsis without Salicylic Acid Accumulation.

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  Systemic acquired resistance (SAR) is a potent innate immunity system in plants that is induced through the salicylic acid-mediated pathway. N-cyanomethyl-2-chloroisonicotinamide (NCI) is able to induce a broad range of disease resistance in tobacco and rice and induces SAR marker gene expression without SA accumulation in tobacco. To clarify the detailed mode of action of NCI, we analyzed its ability to induce defense gene expression and resistance in Arabidopsis mutants that are defective in various defense signaling pathways. Wild-type Arabidopsis treated with NCI exhibited increased expression of several pathogenesis-related genes and enhanced resistance to the bacterial pathogen, Pseudomonas syringae pv. tomato DC3000. NCI induced disease resistance and PR gene expression in NahG transgenic plants, but not in the npr1 mutant. NCI could induce PR gene expression in the etr1-1, ein2-1 and jar1-1 mutants. Thus, NCI activates SAR, independently from ethylene and jasmonic acid, by stimulating the site between SA and NPR1.<br>

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