This study evaluates the phenolic content, antioxidant, and antibacterial properties of hydro-ethanolic extracts from six medicinal and aromatic plants in Morocco: Eucalyptus torquata, Thymus broussonetii, Lavandula angustifolia, Rosmarinus officinalis, Ziziphus lotus, and Acacia raddiana. Sonication was employed for extraction. Total phenolic content, total flavonoid content, and condensed tannin content were quantified using the Folin-Ciocalteu, aluminum chloride, and hydrochloric acid assays, respectively. Antioxidant capacity was assessed via DPPH, total antioxidant capacity, ferric reducing antioxidant power, and ABTS assays. Antibacterial activity was measured by the microdilution method. Phytochemical analysis revealed that E. torquata and Z. lotus had the highest total phenolic content, with 86.75 and 87.58 mg GAE/g of dry matter, respectively. T. broussonetii and R. officinalis had the highest flavonoid and condensed tannin content, at 297.12 mg QE/g of dry matter and 5.10 g/L, respectively. E. torquata exhibited the strongest antioxidant activity, with DPPH and ABTS values of 0.048 and 0.11 mg/mL, and a ferric reducing antioxidant power value of 209.375 mg/g. R. officinalis showed the highest total antioxidant capacity at 1.03 mg AAE/g of dry matter. All extracts displayed bactericidal effects. R. officinalis demonstrated the most potent antibacterial activity, with minimum inhibitory concentrations ranging from 0.625 to 5 mg/mL and minimum bactericidal concentrations from 1.25 to 10 mg/mL. High phenolic content and significant antioxidant activity were noted in E. torquata and R. officinalis. Additionally, all extracts showed substantial antibacterial activity against four bacterial strains, with R. officinalis being the most effective.

The leaves of roselle (Hibiscus sabdariffa L.) have been used as a traditional folk medicine that has diuretic and mild laxative effects. Roselle is cultivated in many countries for medicines and food. However, studies on the variation of functional compounds in different accessions are relatively limited. In this study, we investigated the phenolic compound content of leaf extracts from 49 different roselle accessions from a worldwide collection by ultra-high performance liquid chromatography mass spectrometry. The aim was to chemically classify and assess the pharmacological properties of the phenolic compounds in the leaves. The phenolic compounds were identified as neochlorogenic acid, cryptochlorogenic acid, rutin, rutin isomer, isoquercitin, kaempferol-3-O-rutinoside, kaempferol-3-O-glucoside, quercetin, quercetin isomer, and kaempferol. These compounds were present at significantly different levels among the accessions. The most abundant phenolic compound was rutin, which was found in 45 accessions where the total phenolic compound content was 18.75-46.51 mg/g (average 31.52 mg/g). The phenolic compounds were classified into four groups. The two accessions with the highest total phenolic compound content were from Ghana (PI286316) and Senegal (PI275413). The hierarchical cluster analysis of the 49 roselle accessions showed that they formed five groups according to their phenolic compound content. Our results will be useful for the selection of roselle genotypes with improved functional compounds.

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The faba bean produces medicinally useful phenolic compounds naturally, and is also a good source of food and animal feed. This study quantified the functional compounds and antioxidant activities of five faba bean genotypes selected on the basis of their seed yield and L-dopa content. The highest total tannin content (TTC) and total proanthocyanidin content (TPAC) were observed in the PI252004 genotype and the lowest content in the PI366039 genotype. The total phenolics content (TPC) and total flavonoid content (TFC) of the PI430715 genotype were higher than those of the other genotypes. LC-MS analyses identified 22 different phenolic compounds in the faba bean genotypes. The most abundant proanthocyanidin compounds were prodelphinidin and catechin and the predominant flavonols and flavones were myricetin, quercetin, apigenin, kaempferol, and luteolin-free aglycones or glycosides. The TFC was correlated with ferric-reducing antioxidant power activity (FRAP) (P ≤ 0.05), Trolox equivalent antioxidant capacity (TEAC) (P ≤ 0.01), and DPPH radical scavenging activity (P ≤ 0.01). The results indicated that the PI430715 genotype contained the highest TPC and TFC and exhibited the highest FRAP, TEAC and DPPH radical scavenging activities. These results may help determine the optimal genotypes for breeding new cultivars of faba bean with potentially greater health benefits.

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The Rubus fruit is an economically important berry crop that contains various functional compounds. The
objective
of this study was to analyze fruit qualities (i.e., pH, soluble solids content, titratable acidity, and mineral content) as well as fatty acid and phenolic compounds (i.e., ellagic acid and anthocyanins) among hybrid boysenberry lines developed by hybridization and gamma irradiation. There were no significant differences in the hybrid boysenberry fruit pH and titratable acidity (%) among the tested genotypes. However, the soluble solids content was higher in the BSA119 and BSA144 mutants than in the original genotype (BS_Hybrid). Meanwhile, linoleic acid was the most abundant fatty acid in the analyzed hybrid boysenberry fruits. The fatty acid composition did not differ significantly among the genotypes. The ellagic acid content of all genotypes ranged from 8.72 mg/100 g to 46.10 mg/100 g, with the highest concentration observed for the BSB127 genotype. Additionally, cyanidin-3-O-sophoroside (M-H⁺, 611 m/z) and cyanidin-3-O-glucoside (M-H⁺, 449 m/z) were the two major anthocyanins detected in the boysenberry and mutant genotypes, while cyanidin-3-O-glucoside was the predominant blackberry anthocyanin. The total anthocyanin concentrations of four mutant genotypes (i.e., BSA036, BSA078, BSA101, and BSB127) were significantly higher than that of the original genotype (382.0 mg/100 g). The highest total anthocyanin concentration was observed for the BSA078 genotype (467.9 mg/100 g). These results may be useful for identifying the optimal genotypes for breeding new cultivars with enhanced qualities and potential health benefits.

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