Vaccinium corymbosum L. ‘Biloxi’ is a cultivated blueberry variety valued for its rich content of phenolic compounds, which contribute to its strong antioxidant activity and recognized health benefits. There is little information on the effects of GA₃ and BA on blueberry, especially when used in combination. This study aimed to evaluate whether GA₃ and BA alter the yield and quality of V. corymbosum ‘Biloxi’ fruits. The experiment included 12 treatments consisting of GA₃ (25, 50 and 100 mg L⁻¹) and BA concentrations (50 and 100 mg L⁻¹) alone and combined and a control. The following parameters were analyzed: yield (g) and number of fruits per plant, mass, diameter, pH, soluble solids (SS), titratable acidity (TA), soluble sugars, total phenols, flavonoids, anthocyanins and antioxidant activity. The results indicate that foliar GA₃ and BA application improved the antioxidant capacity and biochemical composition of fruits, without negatively affecting production traits such as yield, fruit size or maturation period. The increases in antioxidant activity, phenol metabolites (total phenols, anthocyanins and flavonoids), soluble sugars, SS and SS/TA ratio were higher with the combination of GA₃ and BA at 100 mg L⁻¹. These results suggest that the combination of GA₃ and BA is a promising approach to sustainably improve fruit quality in commercial blueberry cultivation, providing both economic and nutritional benefits.

Physalis peruviana L., a South American species, has been increasingly cultivated because of its bioactive compounds and high commercial value. This study evaluated the biochemical responses and fruit quality of physalis plants subjected to different water availability regimes (40%, 70%, and 100% of field capacity), followed by recovery periods. The experiment was conducted at São Paulo State University in a randomized block design with split plots. Plants were exposed to different irrigation regimes and subsequently rewatered over a 120-day period. Leaf and fruit analyses showed that water stress at 40% field capacity significantly increased both enzymatic and non-enzymatic antioxidant levels, thereby mitigating oxidative damage, as indicated by lower lipid peroxidation and reduced reactive oxygen species accumulation. However, this defense response was accompanied by marked reductions in fruit yield, fruit number, fresh mass, and fruit quality. Notably, although rewatering reversed several biochemical stress markers at the leaf level, fruit yield and commercial quality did not recover, suggesting irreversible damage to reproductive development during the stress period. These findings indicate that controlled water deficit may enhance antioxidant accumulation, highlighting the potential of stressed plants for pharmaceutical or nutraceutical applications. However, prolonged water stress, even when followed by a recovery period, impairs commercial fruit production. Therefore, irrigation management should be aligned with the intended production objective.