Fig. 4

Distribution of upregulated and downregulated transcripts in response to Pi stress. The total number of upregulated (upper) or downregulated (lower) transcripts identified by mRNA-Seq were determined at various time points of stress (early, middle, and late) during Pi starvation (−P) or phosphate over-abundant Pi supply (++P) treatments. Each bar shows the distribution of transcripts with match in RAP-DB annotation and microarray (gray), transcripts with match in RAP-DB annotation but no match in microarray (white), and unannotated transcripts (black).