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.

ABSTRACT: HKT Na⁺ transporters correspond to major salt tolerance QTLs in different plant species and are targets of great interest for breeders. In rice, the HKT family is composed of seven or eight functional genes depending on cultivars. 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. Here, we further investigate the mechanisms by which OsHKT1;4 contributes to this process and extend this analysis to the role of this transporter in plants in presence of low Na⁺ concentrations. By analyzing transgenic rice plants expressing a GUS reporter gene construct, we observed that OsHKT1;4 is mainly expressed in xylem parenchyma

SUBMITTER: Khan I 

PROVIDER: S-EPMC7406799 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature