Involved in the biosynthesis of the siderophore pseudomonine. Specifically adenylates salicylate and loads it onto its peptidyl carrier domain, via a thioester linkage to the phosphopanthetheine moiety. ATP + holo-[non-ribosomal peptide synthase] + salicylate = AMP + diphosphate + salicyl-[non-ribosomal peptide synthase] Siderophore biosynthesis; pseudomonine biosynthesis. Belongs to the ATP-dependent AMP-binding enzyme family.