Figure 2: Effect of polyamines on root abscission in A. pinnata. Root abscission is represented as % of the initial number of roots following addition of individual polyamines at time zero. (a) Experiments in the presence of varying concentration of putrescine (0.5, 3 and 5 mM () and 2 mM ()); (b) in the presence of varying concentration of spermidine (0.5 mM (); 2 mM (), 3 and 5 mM ()); (c) in the varying concentration of spermine (0.5, 3 and 5 mM () and 2 mM ()). The standard error bars are only shown where larger than the symbols used. Assays were conducted in 10 mM potassium phosphate solution (pH 7).