OsHKT1;1,OsHKT4

2015-01-20 | Categories genes  | Tags salt stress  transporter  root  shoot  salt  leaf  transcription factor  salt tolerance  tolerance  stress  phloem  Salt Sensitivity 

• Information
  • Symbol: OsHKT1;1,OsHKT4
  • MSU: LOC_Os04g51820
  • RAPdb: Os04g0607500
• Publication
  • Effects of salt stress on ion balance and nitrogen metabolism of old and young leaves in rice Oryza sativa L., 2012, BMC Plant Biol.
  • Expressions of OsHKT1, OsHKT2, and OsVHA are differentially regulated under NaCl stress in salt-sensitive and salt-tolerant rice Oryza sativa L. cultivars, 2006, J Exp Bot.
  • 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, 2010, Plant Cell Environ.
  • Sodium transport and HKT transporters: the rice model, 2003, The Plant Journal.
  • The OsHKT1;1 Transporter is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor., 2015, Plant Physiol.
  • Expression and Ion Transport Activity of Rice OsHKT1;1 Variants., 2019, Plants (Basel).
  • OsWRKY28 positively regulates salinity tolerance by directly activating OsDREB1B expression in rice., 2022, Plant Cell Rep.
• Genbank accession number
  • AJ491815
• Key message
  • 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
• Connection
  • OsHAK10, OsHKT1;1~OsHKT4, Effects of salt stress on ion balance and nitrogen metabolism of old and young leaves in rice Oryza sativa L., The up-regulation of OsHKT1;1, OsHAK10 and OsHAK16 might contribute to accumulation of Na+ in old leaves under salt stress
  • OsHAK16, OsHKT1;1~OsHKT4, Effects of salt stress on ion balance and nitrogen metabolism of old and young leaves in rice Oryza sativa L., The up-regulation of OsHKT1;1, OsHAK10 and OsHAK16 might contribute to accumulation of Na+ in old leaves under salt stress
  • OsHKT1;1~OsHKT4, OsHKT1;5~SKC1~OsHKT8~OsHK1;5, 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, Here we present a review on vital physiological functions of HKT transporters including AtHKT1;1 and OsHKT1;5 in preventing shoot Na(+) over-accumulation by mediating Na(+) exclusion from xylem vessels in the presence of a large amount of Na(+) thereby protecting leaves from salinity stress
  • OsHKT1;1~OsHKT4, OsHKT2;1~OsHKT1, Sodium transport and HKT transporters: the rice model, 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+
  • OsHKT1;1~OsHKT4, OsHKT2;1~OsHKT1, Sodium transport and HKT transporters: the rice model, In roots, the expressions were much lower than in shoots, except for OsHKT4 and OsHKT1 in K+-starved plants
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The Rice High-Affinity Potassium Transporter1;1 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
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor., In vivo chromatin immunoprecipitation and in vitro electrophoresis mobility shift assays demonstrated that OsMYBc binds to AAANATNC(C/T) fragments within the OsHKT1;1 promoter
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor., Knockout of OsMYBc resulted in a reduction in NaCl-induced expression of OsHKT1;1 and salt sensitivity
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor., 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
  • OsHKT1;1~OsHKT4, OsHKT1;4, Constitutive Contribution by the Rice OsHKT1;4 Na + Transporter to Xylem Sap Desalinization and Low Na + Accumulation in Young Leaves Under Low as High External Na + Conditions, Three rice HKT genes, OsHKT1;1, OsHKT1;4 and OsHKT1;5, are known to contribute to salt tolerance by reducing Na+ accumulation in shoots upon salt stress
  • OsHKT1;1~OsHKT4, SDEL1~OsMSRFP, The transcription factor OsMYBc and an E3 ligase regulate expression of a K+ transporter during salt stress., OsMSRFP attenuated OsMYBc-mediated OsHKT1;1 expression, and knockout of OsMSRFP led to rice salt tolerance
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The transcription factor OsMYBc and an E3 ligase regulate expression of a K+ transporter during salt stress., A member of the High-Affinity K+ Transporter (HKT) family in rice (Oryza sativa), OsHKT1;1, is a vital regulator of Na+ exclusion from shoots and is bound by a MYB transcription factor (OsMYBc)
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The transcription factor OsMYBc and an E3 ligase regulate expression of a K+ transporter during salt stress., Here, we generated transgenic rice lines in the oshkt1;1 mutant background for genetic complementation using genomic OsHKT1;1 containing a native (Com) or mutated (mCom) promoter that cannot be bound by OsMYBc
  • OsHKT1;1~OsHKT4, OsROC1~OsMYBc, The transcription factor OsMYBc and an E3 ligase regulate expression of a K+ transporter during salt stress., These findings uncover a regulatory mechanism of salt response that fine-tunes OsHKT1;1 transcription by ubiquitination of OsMYBc
  • OsHKT1;1~OsHKT4, OsWRKY28, OsWRKY28 positively regulates salinity tolerance by directly activating OsDREB1B expression in rice., 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
  • OsDREB1B, OsHKT1;1~OsHKT4, OsWRKY28 positively regulates salinity tolerance by directly activating OsDREB1B expression in rice., 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
  • OSBZ8~OsbZIP05, OsHKT1;1~OsHKT4, OsWRKY28 positively regulates salinity tolerance by directly activating OsDREB1B expression in rice., 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
  • OsHKT1;1~OsHKT4, OsHKT2;1~OsHKT1, OsWRKY28 positively regulates salinity tolerance by directly activating OsDREB1B expression in rice., 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

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