Comparison of Phytochemical Profile, Mineral Content, andIn VitroAntioxidant Activities ofCorchorus capsularisandCorchorus olitoriusLeaf Extracts from Different Populations

Abstract

In addition to fiber, Corchorus (jute) leaf is also rich in secondary metabolites and is used in folk medicine in jute-producing communities. It has been reported that jute halts progression of and helps manage different chronic diseases like tumors, obesity, diabetes, and cardiovascular diseases. Various phytochemical, mineral, and antioxidant potency properties of 30 genotypes belonging to Corchorus capsularis and Corchorus olitorius were evaluated in the current study. The results demonstrate that the range of total flavonoids and polyphenols was 3.04 to 13.66 mg rutin equivalent (RE)/g and 5.12 to 7.78 mg gallic acid equivalent (GAE)/g DW, respectively. Total tannin and saponin content in both species was 13.08 to 26.95 mg tannic acid (TAE)/g and 34.45 to 114.59 mg tea saponin (TSE)/g DW, respectively, when analyzed for the first time. Moreover, this study sincerely establishes that jute leaf is a great source of mineral elements (magnesium, zinc, and selenium) and could also be a good energy source. The antioxidant properties of samples were examined with three unique strategies, including DPPH, FRAP, and ABTS values of leaf extract ranging from 206.42 to 351.77 μg/ml (IC50), 16.69 to 94.69 mmol Fe (II)/g DW, and 50.27 to 149.90 mmol trolox equivalent (TE)/g DW, respectively. A principle component analysis (PCA) explained 58.52% of the variance, while a hierarchical cluster analysis (HCA) was performed to construct five distinct groups based on their secondary compound metabolites content and antioxidant activities. Therefore, this study facilitates selection of the high genotypes that might be used as new materials for developing industrial and medicinal uses in addition to sorting genotypes for future genetic engineering purposes in order to enhance a particular bioactive compound and its natural antioxidants that are beneficial for human health.

Polysaccharides, Total Phenolic, and Flavonoid Content from Different Kenaf (Hibiscus cannabinus L.) Genotypes and Their Antioxidants and Antibacterial Properties

“…Likewise, the strong correlation between FRAP assay and total phenolic of other antioxidants has been reported [44]. The number and arrangement of hydroxyl groups, as well as the existence of electron donating and electron withdrawing substituents in the ring structure of phenolics, decide their antioxidant capacity [49,50]. These results showed that polysaccharides and total phenolic content play an important role in the measured antioxidant properties of kenaf leaves, although the degree of correlation suggests that other factors could also contribute.…”

Proximate and Mineral Composition, Phytochemical Analysis, and Antioxidant Activity of Fig Trees (Ficus spp.) Leaf Powder

“…The Folin-Ciocal method was used to determine total tannins [11]. 1 mL of leaf extract was mixed with 49 mL of purified water, 1.7 ml of 75 percent ethanol, 0.1 ml metaphosphoric acid, 1.0 mol/ml Na2CO3 (10 ml), and 2.5 ml Folin-Ciocalteu in a volumetric flask (100 ml).…”

Assessment of Dietary Bioactive Phenolic Compounds and Agricultural Sustainability of an African Leafy Vegetable Corchorus olitorius L.

“…Concerning the nutritional properties of C. olitorius leaves, the main critical element is represented by the consumption habits that involve boiling the leaves. In the case of C. olitorius , recent data showed that the total polyphenols content of fresh leaves ranges from 5.41 to 7.78 mg GAE/g DW depending on the genotype ( 40 ). Considering these reference values, our data suggest that boiling reduced the amount of polyphenols by at least 55–65%.…”