Phenolic Analysis for Classification of Mulberry (Morus spp.) Leaves according to Cultivar and Leaf Age

Figure 2

Principal component analysis based on phenolic compounds of different 9 samples of mulberry leaves: (a) scattering plot of loadings on principle components PC 1 and PC 2; (b) sample map of scores on PC1 and PC 2 as function of cultivars and leaf age. 4-CQA: 4-O-caffeoylquinic acid; 5-CQA: 5-O-caffeoylquinic acid; CQA isomers I, II: caffeoylquinic acid isomers I, II; total CQA: total caffeoylquinic acids; K-H: kaempferol-hexoside; Q-H: quercetin-hexoside; Q-3-R: quercetin-3-O-rutinoside; K-3-R: kaempferol-3-O-rutinoside; K-M-H: kaempferol-(malonyl)hexoside; Q-M-H: quercetin-(malonyl)hexoside; K-R: kaempferol-rutinoside; Q-R: quercetin-rutinoside. Cultivar’s codes are BR 60: Buriram 60, SK: Sakonnakhon, and KH: Khunphai. Leaf age’s codes are T: tips, Y: young leaves, and O: old leaves.

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