Gene Details:

• MSU gene ID: LOC_Os04g51820
• RAPdb gene ID: Os04g0607500
• Gene Symbol: OsHKT1 1 OsHKT4
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• The up-regulation of OsHKT1;1, OsHAK10 and OsHAK16 might contribute to accumulation of Na+ in old leaves under salt stress.
• Yeast expressions of OsHKT1 and OsHKT4 proved that they are Na+ transporters of high and low affinity, respectively, which are sensitive to K+ and Ba2+.
• In roots, the expressions were much lower than in shoots, except for OsHKT4 and OsHKT1 in K+-starved plants.
• OsHKT1;1 was expressed mainly in the phloem of leaf blades and up-regulated in response to salt stress.
• Taken together, these results suggest that OsHKT1;1 has a role in controlling Na+ concentration and preventing sodium toxicity in leaf blades, and is regulated by the OsMYBc transcription factor.
• The OsHKT1;1 Transporter is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor.
• Using a yeast one-hybrid approach, a novel MYB coiled-coil type transcription factor, OsMYBc, was found to bind to the OsHKT1;1 promoter.
• The OsHKT1;1 mutant plants displayed hypersensitivity to salt stress.
• Knockout of OsMYBc resulted in a reduction in NaCl-induced expression of OsHKT1;1 and salt sensitivity.
• OsHKT1;1 in rice, belongs to the high-affinity K+ Transporter family, has been found to be involved in salt tolerance.
• In salt tolerant rice, Pokkali, eight OsHKT1;1 variants (V1-V8) were identified in addition to the full-length OsHKT1;1 (FL) cDNA.
• Under salt stress treatment, the expression levels of OsbZIP05, OsHKT1;1 and OsDREB1B were significantly lower yet the level of OsHKT2;1 was significantly higher in oswrky28 mutants than those in wide type plants.

Function-related keywords:

• salt-stress ,  transporter ,  root ,  shoot ,  salt ,  leaf ,  transcription-factor ,  salt-tolerance ,  tolerance ,  stress ,  phloem ,  Salt-Sensitivity

Literature:

• Effects of salt stress on ion balance and nitrogen metabolism of old and young leaves in rice (Oryza sativa L.) .  DOI:  10.1186/1471-2229-12-194 ;  PMID:  23082824
• Expressions of OsHKT1, OsHKT2, and OsVHA are differentially regulated under NaCl stress in salt-sensitive and salt-tolerant rice (Oryza sativa L.) cultivars .  DOI:  10.1093/jxb/erl199 ;  PMID:  17088362
• A conserved primary salt tolerance mechanism mediated by HKT transporters: a mechanism for sodium exclusion and maintenance of high K(+)/Na(+) ratio in leaves during salinity stress .  DOI:  10.1111/j.1365-3040.2009.02056.x ;  PMID:  19895406
• Sodium transport and HKT transporters: the rice model .  DOI:  10.1046/j.1365-313x.2003.01764.x ;  PMID:  12795699
• The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor .  DOI:  10.1104/pp.15.00298 ;  PMID:  25991736
• Expression and Ion Transport Activity of Rice OsHKT1;1 Variants .  DOI:  10.3390/plants9010016 ;  PMID:  31877741
• OsWRKY28 positively regulates salinity tolerance by directly activating OsDREB1B expression in rice .  DOI:  10.1007/s00299-022-02950-2 ;  PMID:  36350394

Related News:

Gene Resources:

• NCBI ID: AJ491815
• UniProt accessions:

Sequences: