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Panel (a) shows the Biplot Analysis for Principal Component Analysis (PCA) of volatile compounds emitted from field-collected (non-infested) lychee tissues (B1 to B4). Panel (b) shows the Agglomerative Hierarchical Cluster (AHC) analysis for samples B1 to B4 based on selected volatile active compounds. Floral buds (B1), open flowers (B2), leaf buds (B3), and new leaf shoots (B4).
