Table 1.
Selected genes rapidly up-regulated by ammonium nitrate in rice roots.
| Gene Identifier | *Fold change | Gene description |
|---|---|---|
| Nitrate uptake | ||
| Os04g0480200 LOC_Os04g40410 | 7.0 | High-affinity nitrate transporter 2.2, NAR2.2 |
| Os02g0595900 LOC_Os02g38230 | 5.2 | High-affinity nitrate transporter 2.1, NAR2.1 |
| Nitrate/nitrite assimilation | ||
| Os02g0770800 LOC_Os02g53130 | 65.8 | Nitrate reductase [NAD(P)H], NIA |
| Os01g0357100 LOC_Os01g25484 | 8.0 | Ferredoxin–nitrite reductase, NIR |
| Ferredoxin reduction | ||
| Os01g0860601 LOC_Os01g64120 | 42.2 | Ferredoxin, root R-B1 |
| Os01g0631200 LOC_Os01g44050 | 32.3 | Uroporphyrinogen-III C-methyltransferase, UPM |
| Os03g0784700 LOC_Os03g57120 | 8.5 | Ferredoxin–NADP reductase, FNR |
| Os05g0443500 LOC_Os05g37140 | 2.9 | Ferredoxin-6 |
| Os04g0528800 LOC_Os04g44650 | 2.1 | Ferredoxin-thioredoxin reductase, FTR |
| Pentose phosphate pathway | ||
| Os07g0406300 LOC_Os07g22350 | 5.1 | Glucose-6-phosphate 1-dehydrogenase, G6PDH |
| Os11g0484500 LOC_Os11g29400 | 4.3 | 6-Phosphogluconate dehydrogenase, 6PGDH |
| Amino acid transport | ||
| Os06g0633100 LOC_Os06g42660 | 4.9 | Glutamine dumper 6, GDU6 |
| Os08g0446800 LOC_Os08g34700 | 2.1 | Glutamine dumper 2, GDU2 |
Total RNA extracted from roots of 17-day-old rice seedlings grown in hydroponic solution without nitrogen (−N) or treated with 1.43 mM ammonium nitrate for 30 min (+N) was used for microarray analysis. *Fold change indicates the ratio of +N/−N.