Figure 5From: Humic matter elicits proton and calcium fluxes and signaling dependent on Ca2+-dependent protein kinase (CDPK) at early stages of lateral plant root development Anion fluxes measurements in the apical and elongation zones of rice roots. Anion fluxes measurements in the apical (0 to 100 μm) and elongation (200 to 500 μm) zones of rice roots, before (○) and after (●) incubation with 3.5 mM C L−1humic acid (HA).Back to article page