**Appendix A**

**Figure A1.** Time-dependent change in the content of polyamines (agmatine (AGM), putrescine (PUT), cadaverine (CAD), spermidine (SPD), and spermine (SPM)) during thawing of the frozen sprouts of (**a**) lentil, (**b**) alfalfa, and (**c**) daikon radish.

**Figure A2.** Time-dependent degradation of (**a**) tryptamine (TRP), (**b**) phenethylamine (PHE), and (**c**) histamine (HIS) by homogenized fenugreek sprouts at different pH values.

**Figure A3.** Chromatograms of dansylated 1,7-diaminoheptane (IS) and the polyamines agmatine (AGM), putrescine (PUT), cadaverine (CAD), spermidine (SPD), and spermine (SPM) extracted from (**a**) microgreens, (**b**) sprouts, and (**c**) ungerminated seeds of fenugreek—fluorescence detector (350/520 nm).
