Fig. 4

Effect of electric field on the IAA- and FC-induced elongation growth (µm/segment) of maize coleoptile segments (A) and simultaneously with growth measured medium pH (expressed as the difference between H⁺concentration per coleoptile segment at 360 and 60 min, ∆[H⁺]/segment) (B), expressed as % of control (100 %, IAA- or FC-induced elongation growth or proton extrusion of maize coleoptile segments untreated with EF: mean values 1682.7 or 1551.2 µm/segment for growth and 1.83 or 47.54 nM/segment for proton extrusion, respectively. Because of that, the differences between control (FC-induced growth and proton extrusion of the segments untreated with EF) and FC-induced growth and proton extrusion of the segments treated with EF at  ±5 V are statistically insignificant and not shown. Data (mean ± S. E.) are means of at least nine independent experiments. Means followed by the same letter are not significantly different from each other (LSD test P < 0.05)