Fig. 3From: Transcriptomic and phosphoproteomic profiling and metabolite analyses reveal the mechanism of NaHCO3-induced organic acid secretion in grapevine rootsH+ flux (a) and H+-ATPase activity (b) of root tips in response to NaHCO3 treatment. Positive and negative values indicate the efflux and influx of H+, respectively. Values are the means of three replicates, and error bars denote the SD. ** highly significant difference, P < 0.01Back to article page