## 3 Results and Discussion
### Deficit Irrigation Effect on Titratable Acidity, Total Soluble Solids, Sugars, and Organic Acid
This happens, because direct sunlight may enhance the accumulation of vitamin C and polyphenols, whereas crop foliage may favor lycopene development. This compound was reported to be cultivar and season dependent. \begin{table}
\begin{tabular}{l c c c c c c c c c c c} \hline \hline  & **TSS’Brix** & **pH** & \multicolumn{3}{c}{**TA**} & \multicolumn{3}{c}{**Organic Acids (g kg\({}^{-1}\))**} & \multicolumn{3}{c}{**Sugars (g kg\({}^{-1}\))**} \\  & & & **(g L\({}^{-1}\))** & & & **Citic** & **Tartaric** & **Ascorbic Total** & **Glucose** & **Fructose** & **Total** \\ \hline \multicolumn{10}{c}{**ANOVA Test \({}^{\ddagger}\)**} \\  & & & & & & & & & & & & \\  & & & & & & & & & & & \\
1 & ** & NS & NS & NS & ** & ** & ** & NS & ** & ** & ** \\
2 & * & NS & NS & NS & ** & NS & NS & ** & NS & ** & ** \\
3 & * & NS & NS & * & NS & NS & NS & ** & NS & ** & NS & ** \\
4 & NS & NS & NS & * & NS & * & NS & * & ** & NS & NS & NS \\
6 & * & NS & NS & NS & * & NS & NS & NS & * & ** & ** \\ \multicolumn{10}{c}{**Tukey Multiple Range Test \({}^{\ddagger}\)**} \\ \multicolumn{10}{c}{**_Control_** & 5.80 b & 4.75 & 2.96 & 19.7 & 7.97 b & 1.54 b & 0.29 b & 9.80 & 22.89 b & 24.6 b & 47.5 b \\ \multicolumn{10}{c}{**_RDI_** & 6.95 a & 5.26 & 3.35 & 20.8 & 8.56 a & 1.70 a & 0.35 a & 10.6 & 26.39 a & 28.2 a & 54.6 a \\ \multicolumn{10}{c}{**_Control_** & 7.30 b & 5.42 & 2.71 & 28.1 & 8.85 a & 2.07 b & 0.87 & 11.8 a & 28.6 b & 31.1 b & 59.7 b \\ \multicolumn{10}{c}{**_RDI_** & 7.48 a & 5.70 & 2.69 & 28.1 & 6.70 b & 2.56 a & 1.02 & 10.3 b & 38.5 a & 40.4 a & 78.9 a \\ \multicolumn{10}{c}{**_Control_** & 7.48 b & 6.18 & 2.53 & 29.7 a & 8.19 & 1.99 & 0.96 & 11.1 & 31.1 b & 31.6 & 62.7 b \\ \multicolumn{10}{c}{**_RDI_** & 6.3 a & 6.26 & 2.81 & 27.4 b & 8.21 & 2.02 & 1.03 & 11.3 & 32.1 a & 32.2 & 64.3 a \\ \multicolumn{10}{c}{**_Control_** & 8.80 & 5.87 & 3.63 & 24.3 b & 10.7 & 2.51 a & 1.22 & 14.4 a & 375.a & 39.9 b & 77.4 b \\ \multicolumn{10}{c}{**_RDI_** & 8.43 & 5.92 & 3.24 & 26.3 a & 9.99 & 2.32 b & 1.17 & 13.5 b & 36.1 b & 42.2 a & 78.3 a \\ \multicolumn{10}{c}{**_Week_** & 5 & & & & & & & & & & \\ \multicolumn{10}{c}{**_Control_** & 8.10 & 5.77 & 3.03 & 26.8 & 9.16 a & 2.14 a & 0.98 & 12.3 a & 3.2 & 3.4 & 39.4 & 71.8 \\ \multicolumn{10}{c}{**_RDI_** & 8.18 & 6.88 & 2.98 & 27.6 & 8.91 b & 2.00 b & 0.93 & 11.8 b & 31.9 & 39.1 & 71.0 \\ \multicolumn{10}{c}{**_R_** & 6 & & & & & & & & & & \\ \multicolumn{10}{c}{**_Control_** & 7.28 b & 6.44 & 3.31 & 22.1 & 9.72 b & 1.73 & 0.97 & 12.4 & 27.6 b & 33.7 b & 61.3 b \\ \multicolumn{10}{c}{**_RDI_** & 7.38 a & 5.97 & 3.49 & 21.5 & 10.1 a & 1.70 & 1.04 & 12.8 & 28.2 a & 36.3 a & 64.5 a \\ \hline \hline \multicolumn{10}{c}{\({}^{\dagger}\) NS = not significant at \(p<0.05\); **, **, and *** significant at \(p<0.05\), 0.01, and 0.001, respectively.} \\ \multicolumn{10}{c}{\({}^{\ddagger}\) The values (mean of 4 replications) followed by the same letter within the same column do not present statistically significant differences (\(p<0.05\)) according to the Tukey Multiple Range Test. RDI, Regulated deficit irrigation.} \\ \end{tabular}
\end{table} 
Table 3: Total soluble solids (TSS, \({}^{\circ}\)Brix), pH, tittatable acidity (TA, g L\({}^{-1}\)), maturity index (MI), and content (g kg\({}^{-1}\)) of organic acids and sugars in the cherry tomatoes as affected by irrigation treatment and time. Deficit Irrigation Effect on Antioxidant Activity (AA), Total Phenolic Content (TPC), Lycopene and \(\beta\)-Carotene  
For the determination of AA, three tests were used: ABTS++, DPPH*, and FRAP, because each one has different mechanisms of action; these radicals can be neutralized by direct reduction (electronic transfer) or radical extinction (transfer of hydrogen atoms) [36]. The results showed that RDI had only minimal effects on the AA values, although some positive effects were observed for DPPH* (week 4) with 1.2 and 2.1 mmol Trolox kg\({}^{-1}\) for control and RDI treatments, and for FRAP method (week 1) with 1.1 and 1.3 mmol Trolox kg\({}^{-1}\) for control and RDI treatments (Table 4).