Membrane Depolarization Induced by N-Acetylchitooligosaccharide Elicitor in Suspension-Cultured Rice Cells
スポンサーリンク
概要
- 論文の詳細を見る
N-acetylchitooligosaccharides (fragments of chitin) elicit defense responses, including phytoalexin production, in suspension-cultured rice cells. They induced rapid and transient membrane depolarization accompanied by a transient increase in net Cl^<-1> -effiux. The membrane depolarization was not affected by anaerobiosis or azide, suggesting that the major part of the depolarization was mediated by ion channels, not by energy-dependent ion pumps. Depolarization was partly inhibited in the presence of Ca^<2+> or Cl^<-1> channel blockers and highly inhibited by depletion of Ca^<2+> in the extracellular medium. A calcium ionophore, A23187, caused a transient depolarization but not an increase in Cl^<-1> efflux, while it did not inhibit the elicitor-induced transient depolarization and Cl^<-1> efflux. These suggest that the influx of Ca^<2+> from the extracellular space to the cytoplasm is necessary as an initial trigger but not sufficient for membrane depolarization, Cl^<-1> efflux, and the following signaling processes.
- 日本植物生理学会の論文
著者
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SHIBUYA Naoto
Department Biochemistry, National Institute of Agrobiological Science
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Kikuyama Munehiro
Biological Laboratory, The University of the Air
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Kuchitsu Kazuyuki
Department of Cell Biology, National Institute of Agrobiological Resources
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Kikuyama M
Niigata Univ. Niigata Jpn
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Kuchitsu Kazuyuki
Dept. Biotech. Natl. Inst. Agrobiol. Resources
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Kuchitsu Kazuyuki
Department Of Applied Biological Science Tokyo University Of Science
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Shibuya N
Dep. Of Life Sciences Fac. Of Agriculture Meiji Univ.
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Kikuyama Munehiro
Biological Laboratory The University Of The Air.
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Kikuyama Munehiro
Biological Laboratory The University Of The Air
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