Na⁺ Transporter SvHKT1;1 from a Halophytic Turf Grass Is Specifically Upregulated by High Na⁺ Concentration and Regulates Shoot Na⁺ Concentration.

ABSTRACT: We characterized an Na⁺ transporter SvHKT1;1 from a halophytic turf grass, Sporobolus virginicus. SvHKT1;1 mediated inward and outward Na⁺ transport in Xenopus laevis oocytes and did not complement K⁺ transporter-defective mutant yeast. SvHKT1;1 did not complement athkt1;1 mutant Arabidopsis, suggesting its distinguishable function from other typical HKT1 transporters. The transcript was abundant in the shoots compared with the roots in S. virginicus and was upregulated by severe salt stress (500 mM NaCl), but not by lower stress. SvHKT1;1-expressing Arabidopsis lines showed higher shoot Na⁺ concentrations and lower salt tolerance than wild type (WT) plants under nonstress and salt stress condition

SUBMITTER: Kawakami Y 

PROVIDER: S-EPMC7503356 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature