The discrimination of samples based on PCAn of chemical variables
(Fig. 4) highlighted differences among samples that resulted
widely spread in the bi-plot. Four Factors displayed eigenvalues
higher than 1 and the first two Factors explained 62.62% of the total
variance. Factor 1, representing 37.01% of the total variance (positively
correlated with TTA, TP, DPPH and negatively with pH and DE,
as reported in Table S2), displayed a continuous variance, while
Factor 2 clearly distinguished kiwifruit and prickly pear KLBs from
the other products. Since Factor 2 is mainly correlated with SSC,
ethanol and lactic acid.