Figure 1.

Principal component analysis (PCA) (a) and partial least squares-discriminant analysis (PLS-DA) (b) score plot. Score plots were derived using LC-ESI-MS/MS datasets from the red and green pod samples. The X axis represents PC1, and the Y axis represents PC2. Each sample has three biological duplicates, and is been represented on the plot by a unique symbol: the green circle, 10-day-old green pods; the red circle, 10-day-old red pods; the green triangle, 20-day-old green pods; the red triangle, 20-day-old red pods; the green square, 30-day-old green pods; the red square, 30-day-old red pods; the black diamond, QC.