抄録
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.
