Table 2.

Assignment of active metabolic pathways in PS+

ESI (−) 205 markers in 82 sets	ESI (+) 85 markers in 60 sets
Lignans Tyrosine metabolism ABC transporters Flavonoid biosynthesis	Porphyrin and chlorophyll metabolism Ubiquinone and terpenoid-quinone biosynthesis Tyrosin metabolism ABC transporters

Main metabolic pathways responsive to higher levels of SYS found in PS+ in both modes of ionization ESI (+) and ESI (−). MarVis Pathway package assigned the signals to metabolic pathways according to Solanum lycopersicum data base. Sets means all the pathways assigned by the software that can be implicated in systemin action