Figure 4From: In vivo reorganization of the actin cytoskeleton in leaves of Nicotiana tabacumL. transformed with plastin-GFP. Correlation with light-activated chloroplast responsesInfluence of calcium and magnesium ions on the actin network in dark-adapted and weak light-irradiated cells. Samples were incubated for 2 h with 5 mM Ca2+ (A, C) or 5 mM Mg2+ (B, D). Actin cytoskeleton in the dark-adapted cells (A, B) and after irradiation with continuous weak red light for 1 h (C, D). Scale bars, 10 μm.Back to article page