## 3 Results and Discussion
### Deficit Irrigation Effect on Titratable Acidity, Total Soluble Solids, Sugars, and Organic Acid
Authors also reported that the methanol extracts of tomato cultivated under DI conditions inhibited DPPH* by 35-75% [31]. They reported that water stress during flowering-cum- fruiting stage presented the strongest DPPH* inhibitory activity. Which help to explain that a strategy of RDI in which the stress is applied in a certain period of the growing cycle help to increase the AA. This was barely confirmed in the present work (only in 2 weeks), although the difference was lower than in the reported study. This leads to the conclusion that \"Summerbrix\" variety might need higher intensity of water stress to produce a greater content of compounds with antioxidant activity. \begin{table}
\begin{tabular}{l c c c c c} \hline \hline  & **ABTS** & **DPPH* & **FRAP** & **TPC** & **Lycopene** & \(\beta\)**-Carotene** \\ \hline  & & **(mmol Trolox kg\({}^{-1}\))** & & **(g GAE kg\({}^{-1}\))** & & **(mg 100 g\({}^{-1}\))** \\ \hline  & & & & **ANOVA Test * & & \\  & & & **Week** & & & \\
1 & NS & NS & * & NS & ** & NS \\
2 & NS & NS & NS & NS & NS & NS \\
3 & NS & NS & NS & NS & NS & NS \\
4 & NS & * & NS & NS & NS & NS \\
5 & NS & NS & NS & NS & * & NS \\
6 & NS & NS & NS & NS & ** & * \\  & & & & & \\
**Week** & & & & & & \\
**1** & & & & & \\ _Control_ & 0.66 & 1.55 & 1.07 b & 0.39 & 0.51 b & 0.22 \\ _RDI_ & 0.67 & 1.53 & 1.27 a & 0.45 & 0.72 a & 0.29 \\
**Week** & & & & & & \\
**2** & & & & & & \\ _Control_ & 0.86 & 1.62 & 1.73 & 0.55 & 0.38 & 0.26 \\ _RDI_ & 0.96 & 1.82 & 1.80 & 0.54 & 0.31 & 0.24 \\
**Week** & & & & & & \\
**3** & & & & & & \\ _Control_ & 1.12 & 1.81 & 2.09 & 0.59 & 0.52 & 0.26 \\ _RDI_ & 1.27 & 1.84 & 2.27 & 0.60 & 0.59 & 0.27 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Antioxidant activity (ABTS*, DPPH*, and FRAP) and content of lycopene, \(\beta\)-Carotene and total polyphenol content (TPC) in cherry tomatoes as affected by irrigation treatment and time. In a similar way, the RDI treatment led to an increase of the lycopene (weeks 1, 5 and 6) and \(\beta\)-carotene (week 6). The lycopene levels for these significant weeks were 0.51-0.72, 0.34-0.44, and 0.34-0.55 mg 100 g\({}^{-1}\) for control compared to RDI treatment, respectively; while the \(\beta\)-Carotene for the last week ranged between 0.10 and 0.20 mg 100 g\({}^{-1}\) for the control and RDI, respectively. In general, the lycopene mean value were 0.38 mg 100 g\({}^{-1}\) for control and 0.48 mg 100 g\({}^{-1}\) for RDI; while for \(\beta\)-carotene were 0.17 and 0.21 mg 100 g\({}^{-1}\) in \"Summerbrix\" cultivar. Results lower than those reported by [PERSON] et al. (2011) in Ryna@ cultivar, which were reported to increase within the deficit irrigation levels (1.19, 11.1, and 13.8 mg 100 g\({}^{-1}\) lycopene content; 0.82, 2.67, and 3.44 mg 100 g\({}^{-1}\)\(\beta\)-Carotene). On the other hand, a study by [PERSON] et al. (2017) reported, in four tomatoes cultivars, that controlled deficit irrigation did not affect the accumulation of carotenoids and concluded that a higher water stress should be applied to produce an accumulation of these compounds, including lycopene and \(\beta\)-carotene. Carotenoids, which include both lycopene and \(\beta\)-Carotene are reported to be the most effective naturally existing radical sequesters for oxygen radicals ([PERSON] et al., 2011). They are pigments that are mainly synthetized during fruit ripening and their bioavailability is dependent on the irrigation, for instance they decreased with the increase in irrigation water. Lycopene is the responsible for 90% of the tomato color and highly dependent on the cultivar, season and agronomic practices ([PERSON] et al., 2011). This compound, as mentioned before is of high importance as establish the color of tomato, the most important driver of liking for consumers. Additionally, its highly biological activity has generated attention due to the lycopene rich diets relationship with lower risk of certain cancers, heart disease, and age-related diseases ([PERSON] et al., 2011).