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. 2014 Mar 13;15(3):4464–4480. doi: 10.3390/ijms15034464

Figure 3.

Figure 3.

Effects of supplying nitrate to the culture solution on soybean lateral root growth under light or dark conditions. (a) Light 0 mM: Plants were cultivated in N free culture solution under light conditions at 28 °C; (b) Light 5 mM: Plants were cultivated in the culture solution with 5 mM nitrate under light conditions at 28 °C; (c) Dark 0 mM: Plants were cultivated in N free culture solution under dark conditions at 18 °C; (d) Dark 5 mM: Plants were cultivated in the culture solution with 5 mM nitrate under dark conditions at 18 °C. The graph shows the increase in the length of the lateral root. Each data point shows the average and standard error of eight replications of lateral root growth in each treatment. The lateral root growth was statistically different (p < 0.01) compared with light 0 mM treatment from 5 h in dark 0 mM, and from 8 h in dark 5 mM treatment by T-test. Statistic difference (p < 0.05) was observed from 15 h in light 5 mM nitrate treatment.