## 4 Arinto
This suggests higher aroma potential for grapes from this parcel. The distribution observed along PC2 allowed distinguishing BI-VA2 (PC2 positive) from BI-VA1 (PC2 negative) (Figure 5b). According to the loadings plot (Figure 5d), this distinction was mainly due to the lower berry weight and higher amounts of hotrienol, terpinene-4-ol, aromadendrene, and \(\alpha\)-farresene in BI-VA2 grapes, while BI-VA1 exhibited higher amounts of ocimenol and geraniol (isomer 1). Grapes from BI-SM1 and BI-VA2 parcels exhibited higher phenolic and volatile contents, as well as higher antiradical activity. Similarly to Arinto, the observed differences between vineyards may be related to the soil type: clay-sandy (BI-SM1) and clay-calcareous (BI-VA2) soils seem to favor the formation of varietal volatile and phenolic compounds and antiradical activity of Bical grapes. Additionally, the presence of pine trees at the East side of BI-VA1 parcel (Table 1) may reduce the sunlight exposure of grapes in the first hours of the morning, modulating BI-VA1 grapes phenolics and volatiles, affecting these grapes' oenological potential mainly in terms of astringency and aroma properties. Lower sun exposure inhibits the synthesis and accumulation of terpenic compounds and C\({}_{13}\) norisoprenoids in berries [65; 66], while higher sunlight exposure leads to the higher levels of total phenolics [67]. This comprehensive approach demonstrated that Bical grapes exhibit a degree of plasticity with respect to their secondary metabolites and respond physiologically to the soil type and sunlight. * **Sauvignon Blanc** The comprehensive approach performed for Sauvignon Blanc grapes revealed that harvest and parcel factors explained ca. 68% and 12% of the total data set variance, respectively. However, only the effect of harvest was found to be significant (\(p\)-value < 0.0005), (Table 4, Figure 6). A recent study performed with New Zealand Sauvignon Blanc juices and wines also demonstrated that harvest year variations were more effectual than vineyard conditions [48], thus corroborating lesser compositional plasticity of this worldwide variety regarding vineyard parcel characteristics. According to the scores plot (Figure 6a), samples were distributed along PC1: the 2010 harvest was placed in PC1 positive, and the 2011 and 2012 harvests were placed in PC1 negative and near to origin, respectively. According to the loadings plot (Figure 6b), practically all measured parameters contributed to the sample separation along the PC1: 2010 grapes had the highest content of volatile compounds, while 2011 grapes had higher titratable acidity and lower volatile content, principally varietal one. * **Baga** The effect of the harvest year accounted for 61.4% of total data set variance (Table 4). The first component of scores plot separates the 2010 harvest (PC1 positive) from the others (PC1 negative), while the second component separates 2011 and 2012 harvests (Figure 7a). The loadings plot (Figure 7c) showed that 2010 was differentiated by the higher content of monoterpic compounds. From these, \(\beta\)-ocimeene, \(\alpha\)-terpinolene, rose oxide, 1-terpineol, nerol oxide, digydrocavrone, menth-1-en-9-al, and carvone were detected only in 2010 grapes. The higher content of C\({}_{13}\) norisoprenoids and sesquiterpene compounds was responsible for the separation of the 2012 harvest from 2011 along the PC2. Additionally, grapes from 2011 (PC2 negative) also exhibited higher titratable acidity and sugar content compared to the other harvests. The obtained results highlighted the sensitivity of Baga grapes to weather conditions, which affect their oenological potential, mainly in terms of the final wines' alcohol content, astringency, and aroma profile. The effect of parcels on Baga grapes accounted for 14.8% of total data set variance (Table 4). Scores and loading plots are shown in Figure 7b,d, respectively. PC1 distinguishes BA-VA1, placed on the positive side of PC1, from BA-SM1 placed in PC1 negative, while BA-VA2 was near to the origin, but in PC1 positive.