Natural variation in SlSOS2 promoter hinders salt resistance during tomato domestication.

ABSTRACT: Increasing soil salinization seriously impairs plant growth and development, resulting in crop loss. The Salt-Overly-Sensitive (SOS) pathway is indispensable to the mitigation of Na ⁺ toxicity in plants under high salinity. However, whether natural variations of SOS2 contribute to salt tolerance has not been reported. Here a natural variation in the SlSOS2 promoter region was identified to be associated with root Na⁺/K⁺ ratio and the loss of salt resistance during tomato domestication. This natural variation contains an ABI4-binding cis-element and plays an important role in the repression of SlSOS2 expression. Genetic evidence revealed that SlSOS2 mutations increase root Na⁺/K⁺ ratio under salt stres

SUBMITTER: Hong Y 

PROVIDER: S-EPMC9832868 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature