Table 1.
Membrane protein transcripts regulated in roots of the salt-tolerant rice cultivar FL478
| Locus | Annotation | Degree of regulation | TMD | Ortho/homologues in Arabidopsis thaliana | ||
| FL 478 | IR 29 | FL/IR | ||||
| Water transport | ||||||
| Os03g05290 | Aquaporin TIP1.1 | 2.39 | 2.32 | 0.97 | 6 | At2g36830 (AtTIP1.1) |
| Nitrate and ammonium transport | ||||||
| Os04g43070 | Ammonium transporter (OsAMT1.1) | 2.08 | 0.98 | 2.12 | 11 | At3g24290 (AtAMT1.5) |
| Os02g40730 | Ammonium transporter (OsAMT1.3) | 3.03 | 1.2 | 2.53 | 11 | At4g13510 (AtAMT1.1) |
| Os02g02170 | High affinity nitrate transporter | 5.14 | 11 | At5g60770 (AtNRT2.4) | ||
| Amino acid transport | ||||||
| Os02g44980 | Amino acid transport protein, putative, amino acid/auxin permease | 2.20 | 1.35 | 1.63 | 11 | At2g42005 Amino acid transporter |
| Os08g03350 | Plasma-membrane localized histidine transporter (OsHT1) | 2.94 | 1.56 | 1.88 | 10 | At5g40780 (AtLHT1) |
| Os01g40410 | Amino acid transporter family protein | 0.37 | 1.39 | 3.76 | 10 | At3g28960 Amino acid transporter |
| Mono- and divalent cation transport | ||||||
| Os05g31730 | Putative cation-proton exchanger (OsCHX11) | 14.9 | 2.49 | 5.99 | 12 | At4g23700 (AtCHX17) |
| Os07g15370 | Metal cation transporter Nramp1 | 2.04 | 1.06 | 1.92 | 12 | At1g80830 (AtNRAMP1) |
| Os01g56420 | Ctr copper transporter family protein, expressed | 2.28 | 1.00 | 2.28 | 2 | At5g59030 (AtCOPT1) |
| Os04g36720 | Ferric-chelate reductase (OsFRO1) | 0.50 | 1.14 | 0.44 | 10 | At5g49730 (AtFRO6) |
| Os02g04630 | CAX-type proton/calcium exchanger protein | 0.48 | 1.31 | 0.37 | 8 | At1g55730 (AtCAX5) |
| Os07g47350 | Potassium transporter (OsHAK7) | 0.41 | 1.36 | 0.30 | 13 | At3g02050 (AtKUP3/AtKT4) |
| Cation channels | ||||||
| Os06g33600 | Cyclic nucleotide-gated ion channel 1 | 0.44 | 1.38 | 0.32 | 5 | At5g53130 (AtCNGC1) |
| Sugar transport | ||||||
| Os09g249240 | Sugar/sugar alcohol proton symporter | 0.40 | 1.57 | 0.25 | 11 | At4g02050 (AtSTP7) |
| Os10g42830 | Sugar/sugar alcohol proton symporter | 0.45 | 1.23 | 0.37 | 12 | At5g17010 xylose transporter |
| Other transporters | ||||||
| Os02g51110 | Silicon influx transporter (OsLsi1/OsSIIT1/OsNIP2.1) | 2.12 | 1.82 | 1.16 | 6 | At5g37820 (AtNIP4.2/AtNLM5) |
| Os06g38950 | ABC transporter family protein, | 2.76 | 1.89 | 1.46 | 5 | At3g47790 (AtATH7) |
| Os03g09970 | Sulphate transporter 1.2 | 2.03 | 0.70 | 2.86 | 10 | At1g78000 (AtSultr1.2) |
| Os02g21750 | ABC transporter family protein, | 0.44 | 1.68 | 0.26 | 4 | At1g02520 (AtPGP11/AtMDR8) |
| Os08g43120 | ABC transporter, putative, pleiotropic drug resistance ABC transporter (OsPDR1) | 0.48 | 1.28 | 0.37 | 13 | At2g36380 (AtPDR6) |
| Os06g19110 | Cadmium tolerance factor | 0.47 | 20 | |||
| Os11g04830 | Cadmium tolerance factor | 0.44 | 1.27 | 0.34 | 20 | |
| Os01g19290 | Nodulin like protein | 0.44 | 1.46 | 0.30 | 10 | At3g28050 (AtGPTps3) |
| Os11g04830 | Cadmium tolerance factor | 0.44 | 1.27 | 0.34 | 20 | |
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-sensitive cultivar IR29. Open space denotes the absence of signal. TMD: number of predicted transmembrane domains.