Fig. 8: Temporal progression of characteristic integrated peak areas during 48 h of L. parabuchneri inoculation.

(Reference spectrum: MRS medium (0.5 g L−1). Integrated peak areas for amide 1 band (1700–1617 cm‒1, black); amide II band (1577–1464 cm‒1, red); amid III band (1350–1200 cm‒1, blue); nucleic acids (1280–1180 cm‒1, green), and the extracellular polymeric substances (1121–997 cm‒1, purple) are shown.