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SlHAK20: a new player in plant salt tolerance

The majority of crops remain sensitive to salt stress despite the steady increase in salt concentration in agricultural soil. In this issue of The EMBO Journal, Wang et al (2020) screen hundreds of tomato accessions to identify SlHAK20 as a gene accounting for quantitative differences in salt tolerance between accessions. SlHAK20 is a potassium transporter belonging to a poorly studied clade in a large family of transporters, and its mutation induces salt susceptibility both in tomato and rice.