Figure 2

Changes of [Ca²⁺] _i level in NIH-3T3, HeLa and SaOS-2 cells following ethylene treatment. A. NIH-3T3 cells were treated with 0.1 mM (○), 0.3 mM (△) and 1 mM ethephon (□) 5 min after starting the experiment. In one control experiment, 0.5 mM of H₃PO₄ was added (●). B. HeLa cells were treated with 0.3 mM (○), 1 mM (△) and 2 mM ethephon (□) 5 min after starting the experiment. C. SaOS-2 cells were treated with 0.3 mM (○), 1 mM (△) and 2 mM ethephon (□) 5 min after starting the experiment. The values for the ratios of the 340/380 nm images are shown. The arrows mark the time at which ethephon was added to the cells. The results are expressed as mean values ± S.E.; n = 40.