Table 2.
Membrane protein transcripts regulated in roots of the salt-sensitive rice cultivar IR29
| Locus | Annotation/putative function | Degree of regulation | TMD | Ortho/homologues in Arabidopsis thaliana | ||
| IR 29 | FL 478 | FL/IR | ||||
| Water transport | ||||||
| Os03g05290 | Aquaporin TIP1.1 | 2.39 | 2.32 | 0.97 | 6 | At2g36830 (AtTIP1.1) |
| Nitrate and ammonium transport | ||||||
| Os01g50820 | Nitrate transporter | 2.10 | 1.87 | 0.89 | 10 | At1g12940 (AtNRT2.5) |
| Os12g29950 | Nitrate transporter, putative, nodulin family protein | 2.58 | 12 | At2g39210 nodulin-type channel | ||
| Os11g23890 | Low-affinity nitrate transporter | 0.46 | 0.62 | 1.35 | 11 | At3g16180 proton-dependent oligopeptide or low-affinity nitrate transporter |
| Amino acid transport | ||||||
| Os02g09810 | Amino acid transporter family protein | 2.11 | 1.21 | 0.57 | 10 | At3g30390 Amino acid transporter |
| Os01g40380 | Amino acid transporter | 2.13 | 4 | At2g41190 Amino acid transporter | ||
| Mono- and divalent cation transport | ||||||
| Os05g31730 | Cation-proton exchanger (OsCHX11) | 2.49 | 14.9 | 5.99 | 12 | At4g23700 (AtCHX17) |
| Os12g03830 | Major facilitator superfamily antiporter | 0.44 | 1.19 | 2.68 | 9 | At5g13740 (AtZIF1) |
| Os11g04020 | Major facilitator superfamily antiporter | 0.39 | 0.62 | 1.58 | 12 | At5g13750 (AtZIFL1) |
| Cation channels | ||||||
| Os01g48680 | Voltage-gated Ca2+-permeable channel (OsTPC1) | 2.19 | 0.53 | 0.24 | 11 | At4g03560 (AtTPC1) |
| Other transporters | ||||||
| Os08g44750 | Nodulin MtN21 family protein | 0.45 | 0.79 | 1.76 | 10 | At1g75500 |
Plants were grown in hydroponics for 3 weeks and subsequently treated with 50 mM NaCl for 12 d. Membrane protein transcripts that changed by ≥2-fold are listed with the corresponding change in the same transcript from the salt-tolerant cultivar FL478. Open space denotes the absence of signal. TMD: number of predicted transmembrane domains.