Fig. 6From: Optimization of salicylic acid and chitosan treatment for bitter secoiridoid and xanthone glycosides production in shoot cultures of Swertia paniculata using response surface methodology and artificial neural networka. HPTLC fingerprints of secoiridoid glycosides (a): where 1–10 tracks represent tissue cultured plant samples (1 and 2 control plants; 3–6 salicylic acid treated cultured plant samples; 7–10 chitosan treated cultured plant samples) matched with standard compounds of swertiamarin (ii) and amarogentin (i) whereas (b) and (c) represent overlay spectra of plant samples with standard compounds- amarogentin (b) and swertiamarin (c). b. HPTLC fingerprints of xanthone glycoside (a): where 1–10 tracks represent tissue cultured plant samples (1 and 2 control plants; 3–6 salicylic acid treated cultured plant samples; 7–10 chitosan treated cultured plant samples) matched with standard compound of mangiferin (Std.) whereas (b) represents overlay spectra of plant samples with standard compound mangiferin (b)Back to article page