Fig. 2
From:Effect of phosphorus supply on root traits of twoBrassica oleraceaL. genotypes
Attenuated total reflection-Fourier transform infrared analysis of root exudates collected from twoBrassica oleraceaaccessions (C6 and F103) grown hydroponically for two weeks in solutions containing 0.025 mM phosphorus (P;Low P; LP) and 0.25 mM P (High P;HP). Average spectra of ten measurements ± standard deviation (a) and principal component analysis, which depicts the first two principal components for response variables grouped by treatments and accessions (b)