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(A) FTIR spectra (600–4000 cm−1) of Thymus lotocephalus shoots cultured in media with 0 (control, CT), 2, 5, or 7% PEG, Fe3O4 nanoparticles (NPs), salicylic acid (SA), or methyl jasmonate (MeJA) and a combination of PEG (7%) with Fe3O4 NPs, SA and MeJA; (B) FTIR spectra of T. lotocephalus shoots cultured in media with 0 (control, CT), 7% PEG, MeJA or 7% PEG + MeJA with the identification of the bands (the corresponding bonds and functional groups are presented in Table 2).
