Effect of Rare Earth Elements on Cold-responsive Ca^<2+> Signaling in Tobacco Cells(Papers presented at the Seminar, "Function and structure of thermo/moisture sensors in biosystem")

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  • LIN Cun
    Graduate School of Environmental Engineering, the University of Kitakyushu
  • YOSHIZUKA Kazuharu
    Graduate School of Environmental Engineering, the University of Kitakyushu
  • KAWANO Tomonori
    Graduate School of Environmental Engineering, the University of Kitakyushu

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  • タバコ培養細胞における低温応答性カルシウム情報伝達に対する希土類の影響(セミナー「生体の温度・水分センサーの機能と構造」)
  • タバコ培養細胞における低温応答性カルシウム情報伝達に対する希土類の影響
  • タバコ バイヨウ サイボウ ニ オケル テイオン オウトウセイ カルシウム ジョウホウ デンタツ ニ タイスル キドルイ ノ エイキョウ

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Plants respond to various environmental stimuli such as temperature shifts, by activating each component in the signaling cascade such as Ca^<2+> channels, required for adaptations to changing environments. In this study, we tested the effects of naturally existing rare earth elements (Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Lu) added as chloride salts, on Ca^<2+> influx in induced by two different temperature stresses, namely cold shock and heat shock, in suspension-cultured transgenic tobacco cell line (BY-2) expressing aequorin, a Ca^<2+>-sensitive luminescent protein in its cytosol. Action of Al^<3+> a putative TPC1-type channel inhibitor was also examined. Based on the results obtained, the nature of temperature-sensitive Ca^<2+> influx was discussed.

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