Help from bacteria for salty plants Soil salinity in arid regions is frequently an important limiting factor for cultivating agricultural crops. Although many technologies have been implicated in the improvement of salt tolerance, only PGPR-elicited plant tolerance against salt stress has been previously studied. In onestudy [12] the ethylene content in tomato seedlings exposed to high salt was reduced by application of Achromobacter piechaudii, indicating that bacterial ACC deaminase