[Involvement of anion channel in signal transduction of early defense responses elicited by harpinPss in tobacco]

Shi Yan Sheng Wu Xue Bao. 1999 Mar;32(1):88-92.
[Article in Chinese]

Abstract

No matter when anion channel inhibitors, DIDS (4, 4'-diisothiocyanatostilbene-2, 2'-disulfonic acid) and A9C (anthracene-9-carboxylic acid) added (before, at the same time of or after harpinPss treatment), they can inhibit harpinPss-induced hypersensitive response in tobacco seedlings and release of active oxygen and extracellular alkalinization in tobacco suspension cells. DIDS and A9C also inhibit harpinPss-induced Ca2+ influx. In all these cases, DIDS is more efficient than A9C. It is postulated that anion channel positively regulates calcium channel in plasma membrane, and harpinPss may function through signal transduction mediated by anion channel and calcium channel to regulate cellular Ca2+ concentration and defense responses.

Publication types

  • English Abstract
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anions
  • Bacterial Outer Membrane Proteins / pharmacology*
  • Calcium / metabolism*
  • Calcium Channels / physiology
  • Cells, Cultured
  • Ion Channels / physiology*
  • Nicotiana / drug effects
  • Nicotiana / physiology*
  • Plants, Toxic*
  • Reactive Oxygen Species / metabolism
  • Signal Transduction / physiology

Substances

  • Anions
  • Bacterial Outer Membrane Proteins
  • Calcium Channels
  • Ion Channels
  • Reactive Oxygen Species
  • HrpZ protein, Pseudomonas syringae
  • Calcium