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Table 1 Dehydration response and transcriptional memory genes in switchgrass, maize and Arabidopsis

From: Transcriptional and physiological data reveal the dehydration memory behavior in switchgrass (Panicum virgatum L.)

  Switchgrass Maize Arabidopsis
Total genes by RNA-Seq 47,207 39,635 33,555
Dehydration response 1566 (3.3%) 2062 (5.2%) 6579 (19.6%)
 Induced 811 1636 3396
 Repressed 755 426 3183
Non-memory genes 825 1246 4616
 Induced [+/=] (C1 < D1 = D2) 337 941 2177
 Repressed [−/=] (C1 > D1 = D2) 488 305 2439
Memory genes 741 816 1963
 [+/+] (C1 < D1 < D2) 93 (13%) 162 (20%) 362 (18%)
 [−/−] (C1 > D1 > D2) 113 (15%) 72 (9%) 310 (16%)
 [+/−] (C1 < D1 > D2) 381 (51%) 533 (65%) 857 (44%)
 [−/+] (C1 > D1 < D2) 154 (21%) 49 (6%) 434 (22%)
Late-response genes 5639 (11.9%) 2924 (7.4%) 1371 (4.1%)
 [=/+] (C1 = D1 < D2) 3158 1678 798
 [=/−] (C1 = D1 > D2) 2860 1246 573
  1. Genes that were up-regulated, down-regulated, and exhibited no significant change in expression are indicated by the symbols “+”, “−” and “=”, respectively. Changes in an individual gene’s expression are denoted in the format [a/b], where a is the symbol indicating the change between C1 and D1, and b is the symbol indicating the change between D1 and D2. Thus, for example, a gene of the [+/+] type was up-regulated between C1 and D1, and also between D1 and D2, whereas a gene of the [=/+] type exhibited no change in expression between C1 and D1, but was up-regulated between D1 and D2