Honeys from Native Species in Uruguay: Relationships between Physicochemical Parameters, Antioxidant Compounds, and Color
摘要
Honey is a natural product with recognized physicochemical characteristics that can be interrelated and influenced by its botanical and geographical origins. This study aimed to analyze honeys primarily derived from native species in Montes del Queguay, a protected area in Uruguay, focusing on pollen analysis, physicochemical parameters, phenolic compounds, and 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS• +) radical scavenging activity, expressed as Trolox Equivalent Antioxidant Capacity. The predominant pollen sources were Scutia buxifolia, Blepharocalyx salicifolius, other native Myrtaceae, and Terminalia australis. Ash content and electrical conductivity ranged from 0.437 ± 0.029 to 0.678 ± 0.009% and 693.20 ± 8.95 to 1049.10 ± 2.65 μS/cm, respectively. Total phenolic content, total flavonoid content, and Trolox Equivalent Antioxidant Capacity values varied between 89.47 ± 2.08 and 170.35 ± 3.73 mg GAE/100 g, 1.22 ± 0.01 and 2.11 ± 0.00 mg QE/100 g, and 239.61 ± 15.33 and 468.75 ± 8.93 μmol TE/100 g, respectively. Honey color ranged from light to dark amber. Significant positive correlations were observed between ash and electrical conductivity, total phenolic content and Trolox Equivalent Antioxidant Capacity, total phenolic content and color, and Trolox Equivalent Antioxidant Capacity and color. Principal component analysis explained 73.59% of the data variability and suggested that EC could serve as a potential discriminatory factor for honeys, particularly those from Scutia buxifolia. These results contribute to the characterization of honeys predominantly produced from native species in Montes del Queguay. The observed relationships between antioxidant parameters and color offer insights that could enhance the value of these honeys.
Graphical Abstract