Figure 2.

Some molecules involved in Bacillus-plant interactions. Plants produce various compounds including the hormones salicylic acid (SA), jasmonic acid (JA), cytokinins (CK), and indole acetic acid. Plants also produce organic acids, flavonoids, amino acids, and 1-aminocyclopropane-1-carboxylate (ACC) as signaling molecules. On the other hand, Bacillus produce volatiles such as 2,3 butanediol, lipopeptides such as surfactin, and phytohormones such as gibberellic acid and acyl homoserine lactone (AHL) as signaling molecules.