Discussion
Over the past decades, several studies indicated that strains of various rhizobacterial species can promote plant growth, induce systemic resistance against pathogens and phytophagous insects and can alter plant secondary metabolism (van de Mortel et al. 2012; Etaloet al. 2018; Stringlis et al. 2018a; Hu et al.2018; Jeon et al. 2021). Our results confirm and extend results obtained in previous studies (Barriuso et al. 2008; Walkeret al. 2011; van de Mortel et al. 2012; Cordovez et al. 2018) and provide, for the first time, new insights into global metabolome changes and specific plant metabolic signatures of effective and ineffective partnerships between rhizobacteria and their host plant.