Fig. 3

Transcriptome profiling of two-week-old root tissues. RNA was extracted from N-starved roots and that after 30 min of nitrate supply. a The ratio of expressed genes in the root tissues of two-week-old seedlings. b The volcano plot of log2 fold changes of gene transcriptional abundance. The red and green dots indicate that both more than two fold-changes (x-axis) as well as high statistical significance (−lg of P-value, y-axis). c Top 20 enriched GO terms of the functionally annotated genes that were responsive to nitrate supply in N-starved plants