Table 2.

FTIR spectral bands and functional groups of Thymus lotocephalus shoots cultured in media with 0 (control) or 7% PEG, methyl jasmonate (MeJA), or 7% PEG + MeJA reported in Figure 2B.

Wavenumber Range		Bond	Functional Group	References
Present Study (cm−1)	Reference (cm−1)
3443–3406	3415–3369	O–H stretching	Alcohols	[32,33]
2945–2889	2920–2800	C–H stretching	Lipids, carbohydrates	[32,33,34,36]
1735–1647	1723–1607	C=O stretching, C–N stretching, COO– antisymmetric stretching	Proteins, lipids, carbohydrates	[32,34,35,36]
1468–1342	1454–1366	C–O stretching, C–C stretching, COO symmetric stretching, CH2 bending	Phenyl groups of aromatic compounds	[33,34,36]
1281–1271	1300–1260	C–O stretching	Hydroxyflavonoids	[34,36]
1242–1155	1270–1150	C–O stretching, C–N stretching	Acid or ester	[33,34]
1115–1051	1170–950	C–O and C–C stretching	Carbohydrates, flavonoids	[34,35,36]
962–843	980–960	C=H bending, C–H out-of-plane bending	Terpenoids	[33,34,35]