Figure 3.

Root exudate chemical diversity modulated by rhizosphere microbiome. SIREM-related metabolites that are exuded from “systemic side” roots of tomato plants, which were previously detected in other tomato tissues, depicted in (A), tomato trichomes; B, unripe fruit and; C, ripe fruit. Structures of SIREM-related metabolites: A, acylsugars; B, glycoalkaloids; and C, hydroxycinnamic acid conjugates are presented. (1) S4:17 (2,5,5,5); (2) S3:15 (5,5,5); (3) G2:12 (6,6); (4) S2:10 (5,5); (5) S1:5; (6) S4:19 (2,5,6,6); (7) dehydrotomatine; (8) hydroxytomatine; (9) coumaroyloctopamine; and (10) feruloyloctopamine. The acyl chains positions were not unambiguously confirmed in the acylsugar structures and were assigned arbitrarily.