HKT1;1 and HKT1;2 Na⁺ Transporters from Solanum galapagense Play Different Roles in the Plant Na⁺ Distribution under Salinity.

ABSTRACT: Salt tolerance is a target trait in plant science and tomato breeding programs. Wild tomato accessions have been often explored for this purpose. Since shoot Na⁺/K⁺ is a key component of salt tolerance, RNAi-mediated knockdown isogenic lines obtained for Solanum galapagense alleles encoding both class I Na⁺ transporters HKT1;1 and HKT1;2 were used to investigate the silencing effects on the Na and K contents of the xylem sap, and source and sink organs of the scion, and their contribution to salt tolerance in all 16 rootstock/scion combinations of non-silenced and silenced lines, under two salinity treatments. The results show that SgHKT1;1 is operating differently from SgHKT1;2 regarding Na circulation in the tomato vascular system under salinity. A

SUBMITTER: Asins MJ 

PROVIDER: S-EPMC9103179 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature