Ion channels in plants

Figures & data

Figure 1. Schematic visualization of the electric field around the growing maize root apex using data published by Collings et al.²⁸ The outward current is shown by blue arrows, the inward current is depicted by red arrows. The two reversals of the electric current polarity at the both borders of the transition zone are typical for root apices of all plants tested so far. Identity of ion channels underlying this phenomenon is enigmatic so far, but they do not seem to be related to fluxes of H⁺ and K⁺. The GLRs and CNGCs are strong candidates in this respect.

Collings DA, White RG, Overall RL. Ionic current changes associated with the gravity-induced bending response in roots of Zea mays L. Plant Physiol 1992; 100:1417 - 26; http://dx.doi.org/10.1104/pp.100.3.1417; PMID: 16653140

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