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Figure 2 | BMC Plant Biology

Figure 2

From: Biomarker metabolites capturing the metabolite variance present in a rice plant developmental period

Figure 2

Plot of correlations among samples based on biomarker metabolites vs. based on principal component scores. The biomarker metabolite set does a reasonable job of mimicking the pattern among the sampled tissues based on the top five principal components. The pattern among the tissues with respect to their metabolite composition is discerned by the set of all pairwise Pearson correlation values among the tissues. This "correlation measure" of the pattern among the tissues was applied using two different sets of markers. The set represented by the horizontal axis used the scores of the top five principal components from the analysis of the comprehensive metabolomics dataset. The set represented by the vertical axis used the biomarker metabolite concentrations. These metabolite concentrations are standardized and centered because our study was mainly interested in the magnitude and pattern of the variation in the metabolites during development. The correlation values plotted in the figure have been transformed to a Z-scale to bring out the accuracy (slope of a fitted line would be near 1 with an intercept near 0) in the ability of the biomarker metabolite set to mimic the pattern among the tissues, and with reasonable precision (r = 0.82).

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