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Table 12 Calculation of the EH+–constant for the empirical formula EH+ = Em/(log10 1/aH+ ∙ μm) = 0.157 ± 0.009, where Em (mV) is the membrane potential in the perenchymal coleoptile cells of Zea mays L. (Additional file 1: SI Table 1) and H+-activity is taken from Additional file 1: SI Table 2

From: A quantitative report on the impact of chloride on the kinetic coefficients of auxin-induced growth: a numerical contribution to the “acid growth hypothesis”

Treatment Em (mV)
A (0 min) B (3 min) C (6 min) D (10 min) E (20 min) F (30 min) Mean
1 mM KCl + IAA −0.199 −0.200 −0.192 −0.194 −0.208 −0.217 −0.202 ± 0.009
10 mM KCl −0.182 −0.177 −0.175 −0.175 −0.176 −0.175 −0.177 ± 0.003
10 mM KCl + IAA −0.109 ± 0.011 −0.110 ± 0.011 −0.108 ± 0.011 −0.111 ± 0.009 −0.116 ± 0.010 −0.118 ± 0.011 −0.112 ± 0.004
10 mM KCl + IAA + A-9-C −0.144 ± 0.009 −0.135 ± 0.009 −0.138 ± 0.008 −0.141 ± 0.010 −0.140 ± 0.007 −0.138 ± 0.008 −0.139 ± 0.003
Mean −0.158 −0.155 −0.153 −0.155 −0.160 −0.162 −0.157 ± 0.009
  1. Errors calculated using the total derivative and standard deviation methods