Figure 4.

Depletion of total cellular ATP in tobacco cell cultures after treatment with SA or its analogs. A, Tobacco cell cultures were incubated with various concentrations of SA. At indicated time points, cell samples were taken for determining total cellular ATP levels. B, Tobacco cell cultures were incubated with 0.5 mm SA, acetylsalicylic acid (ASA), 5-chlorosalicylic acid (5-CSA), 3-hydroxybenzoic acid (3-HBA), or 4-hydroxybenzoic acid (4-HBA). ATP levels were determined after 6 h of incubation and reported (+se calculated from three independent assays). FW, Fresh weight.