Figure 6From: Humic matter elicits proton and calcium fluxes and signaling dependent on Ca2+-dependent protein kinase (CDPK) at early stages of lateral plant root development Calcium-dependent protein kinase (CDPK) activity in rice roots treated with and without humic acid. Calcium-dependent protein kinase (CDPK) activity in rice roots treated with and without humic acid (HA: 3.5 mM C L−1 and control), respectively. The data represent the mean ± SD (n = 5).Back to article page