Communicative & Integrative Biology (May 2018)

Involvement of S-type anion channels in disease resistance against an oomycete pathogen in Arabidopsis seedlings

  • Takamitsu Kurusu,
  • Daiki Mitsuka,
  • Chikako Yagi,
  • Nobutaka Kitahata,
  • Tomokazu Tsutsui,
  • Takashi Ueda,
  • Yoshiko Yamamoto,
  • Juntaro Negi,
  • Koh Iba,
  • Shigeyuki Betsuyaku,
  • Kazuyuki Kuchitsu

DOI
https://doi.org/10.1080/19420889.2018.1495007
Journal volume & issue
Vol. 11, no. 3
pp. 1 – 6

Abstract

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Pharmacological indications suggest that anion channel-mediated plasma membrane (PM) anion efflux is crucial in early defense signaling to induce immune responses and programmed cell death in plants. Arabidopsis SLAC1, an S-type anion channel required for stomatal closure, is involved in cryptogein-induced PM Cl− efflux to positively modulate the activation of other ion fluxes, production of reactive oxygen species and a wide range of defense responses including hypersensitive cell death in tobacco BY-2 cells. We here analyzed disease resistance against several pathogens in multiple mutants of the SLAC/SLAH channels of Arabidopsis. Resistance against a biotrophic oomycete Hyaloperonospora arabidopsidis Noco2 was significantly enhanced in the SLAC1-overexpressing plants than in the wild-type, while that against a bacteria Pseudomonas syringae was not affected significantly. Possible regulatory roles of S-type anion channels in plant immunity and disease resistance against bacterial and oomycete pathogens is discussed.

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