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Chemical and Biological Technologies in Agriculture
Fig. 6 | Chemical and Biological Technologies in Agriculture

Fig. 6

From: Integrative physiological and metabolic traits reveal the mechanisms of chamomile flowers in response to nicotine stress

Fig. 6

Multivariate statistical analysis of chamomile samples treated with different nicotine concentrations (CK: 0 μg/g; N-1: 1 μg/g; N-10: 10 μg/g; N-100: 100 μg/g; N-500: 500 μg/g; QC: quality control). PCA score plot R2X (cum) = 0.513, Q2 (cum) = 0.125 (A); OPLS–DA score plot, R2X (cum) = 0.723, Q2 (cum) = 0.549 (B); cross-validation plot of OPLS–DA model with 200 permutation tests (intercepts of Q2 and R.2 were -0.448 and 0.769, respectively) (C); loadings plot of OPLS–DA (red squares represent the most differential metabolites) (D)

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