OsMGT1

2022-11-15 | Categories genes  | Tags aluminum  transporter  Al tolerance  magnesium  cadmium  root  shoot  leaf  xylem  sheath  salt  tolerance  salt tolerance  salt stress  stress  phloem  Salt Sensitivity 

• Information
  • Symbol: OsMGT1
  • MSU: LOC_Os01g64890
  • RAPdb: Os01g0869200
• PSP score
  • LOC_Os01g64890.1: 0.0109
• PLAAC score
  • LOC_Os01g64890.1: 0
• pLDDT score
  • 77.37
• Protein Structure from AlphaFold and UniProt
  • 
• Publication
  • Up-regulation of a magnesium transporter gene OsMGT1 is required for conferring aluminum tolerance in rice, 2012, Plant Physiol.
  • A magnesium transporter OsMGT1 plays a critical role in salt tolerance in rice., 2017, Plant Physiol.
• Genbank accession number
  • AB731703
• Key message
  • Up-regulation of a magnesium transporter gene OsMGT1 is required for conferring aluminum tolerance in rice
  • When a putative rice (Oryza sativa) Mg transporter gene, Oryza sativa MAGNESIUM TRANSPORTER1 (OsMGT1), was knocked out, the tolerance to Al, but not to cadmium and lanthanum, was decreased
  • Taken together, our results indicate that OsMGT1 is a transporter for Mg uptake in the roots and that up-regulation of this gene is required for conferring Al tolerance in rice by increasing Mg concentration in the cell
  • OsMGT1 was expressed in both the roots and shoots in the absence of Al, but the expression only in the roots was rapidly up-regulated by Al
  • OsMGT1 was also expressed in the phloem region of basal node, leaf blade and sheath
  • Here, we show evidence that a rice Mg transporter OsMGT1 is required for the salt-tolerance probably by regulating transport activity of OsHKT1;5, a key transporter for the removal of Na+ from the xylem sap at the root mature zone
  • Knockout of OsMGT1 did not affect total Na uptake, but increased Na concentration in the shoots and xylem sap, resulting in a significant increase in salt sensitivity at low external Mg2+ concentration (20-200 μM)
  • Spatial expression analysis revealed that OsMGT1 was expressed in all root cells of the root tips, but was highly expressed in the pericycle of root mature zone
  • Taken together, our results suggest that Mg2+ transported by OsMGT1 in the root mature zone is required for enhancing OsHKT1;5 activity, thereby restricting Na accumulation to the shoots
  • A magnesium transporter OsMGT1 plays a critical role in salt tolerance in rice.
  • OsMGT1 was expressed in both the roots and shoots, but only that in the roots was moderately up-regulated by salt stress
  • Furthermore, knockout of OsHKT1;5 in osmgt1 mutant background did not further increase its salt sensitivity
• Connection
  • OsHKT1;5~SKC1~OsHKT8, OsMGT1, A magnesium transporter OsMGT1 plays a critical role in salt tolerance in rice., Here, we show evidence that a rice Mg transporter OsMGT1 is required for the salt-tolerance probably by regulating transport activity of OsHKT1;5, a key transporter for the removal of Na+ from the xylem sap at the root mature zone
  • OsHKT1;5~SKC1~OsHKT8, OsMGT1, A magnesium transporter OsMGT1 plays a critical role in salt tolerance in rice., Furthermore, knockout of OsHKT1;5 in osmgt1 mutant background did not further increase its salt sensitivity
  • OsHKT1;5~SKC1~OsHKT8, OsMGT1, A magnesium transporter OsMGT1 plays a critical role in salt tolerance in rice., Taken together, our results suggest that Mg2+ transported by OsMGT1 in the root mature zone is required for enhancing OsHKT1;5 activity, thereby restricting Na accumulation to the shoots

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