Rapid Down and Upward Translocation of Salicylic Acid in Tobacco Plants

DOI NDLデジタルコレクション Web Site 被引用文献3件 参考文献34件
  • OHASHI Yuko
    Plant Physiol. Dept., National Institute of Agrobiological Sciences
  • MURAKAMI Taka
    Plant Physiol. Dept., National Institute of Agrobiological Sciences
  • MITSUHARA Ichiro
    Plant Physiol. Dept., National Institute of Agrobiological Sciences
  • SEO Shigemi
    Plant Physiol. Dept., National Institute of Agrobiological Sciences

書誌事項

公開日
2004
DOI
  • 10.5511/plantbiotechnology.21.95
公開者
日本植物バイオテクノロジー学会

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説明

Salicylic acid (SA) is a proposed signal for systemic acquired resistance to pathogen infection, while precise mode of SA translocation is little understood. To study it directly, 14C-SA was fed to the petiole end and the signal was detected autoradiographically. In juvenile plants, the signal moved to the lower stem and root, then the vascular systems of upper, middle and lower leaves within 1 h. In adult plants with 13 developed leaves, it was detected in nodes of 6 upper and 3 lower leaves at 10 min, and all leaves at 1 h along the orthostichy of phyllotaxis after feeding from the 7th leaf. The signal dispersed to the leaf gap, cortex parenchyma, and epidermis. One and 7% of radioactivity recovered was detected as SA β-glucoside at 10 min and 1 h, respectively. Thus, SA can move rapidly at all nodes of plants as an emergency signal within 1 h.

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