Correction to: BMC Plant Biol (2019) 19: 225

https://doi.org/10.1186/s12870-019-1838-3

In the original publication of this article [1], the author pointed out there is an error in Figs. 4 and 5. The ‘BR’ should be replaced by ‘EBR’. The correct figures are below:

Fig. 4
figure 1

Effects of suboptimal RZT and EBR on NO3 (A; scatter NO3 flux rate, B; average NO3 flux rate) flux rate in roots of cucumber seedlings under suboptimal RZT treatment. Flux rate was recorded for 10 min in roots seven days after treatment. Each point is the mean of nine individual seedlings and bars indicate standard deviations. Treatments with the same letters are not significantly different by the least significant difference (LSD) test at P = 0.05

Fig. 5
figure 2

Effects of suboptimal RZT and EBR on NH4+ (A; scatter NH4+ flux rate, B; average NH4+ flux rate) flux rate in roots of cucumber seedlings under suboptimal RZT treatment. Flux rate was recorded for 10 min in roots seven days after treatment. Each point is the mean of nine individual seedlings and bars indicate standard deviations. Treatments with the same letters are not significantly different by the least significant difference (LSD) test at P = 0.05