Fig. 2. Comparison of the effect of full or cut-down FT-IR spectral ranges on sample clustering. PCA scores plots (a) and PC1 and PC2 loading plots (b) for full spectra (wavenumbers 4000–
600 cm−1) and scores (c) and loading plots (d) for cut-down spectra (wavenumbers 1800–950 cm−1) generated from C. reinhardtii grown in either standard TAP (18 replicates), Low
P TAP (18 replicates), or Low N TAP media (9 replicates).