Fig. 7.
(A) Relationship between capacitance and the distance between the plant electrode and the solution surface, when roots were lowered incrementally into solution (see Fig. 3C). (B) The relationship between capacitance measured after (C a) and before (C b) trimming of the submerged root (see Fig. 3C). The linear regression for the combined data was C a = (1.008±0.01) × C b – (1.47±1.17) (mean ± SE, n = 29, R 2 = 0.998). Points represent the mean ± SD of three repeated measurements. Data are shown for a whole root system (● ), an excised seminal root (▲), and an excised nodal root (■). Capacitance was measured at increments of 1cm for the first 6cm and in increments of 3cm thereafter.