It is known that bands at 2920 and 2850 cm-1 in FTIR spectra are assigned to the asymmetric and symmetric stretching vibrations of (CH2) groups.
One peak at 1920 cm-1 was observed in the FTIR spectra of the control treatment in my experiment, but when the plant was subjected to varied salinity levels, a new band at 2850 cm-1 appeared.
Anyone who could assist me would be greatly appreciated.