Chemical Composition of Leaves of Chinese Quince (Pseudocydonia sinensis (Thouin) C.K. Schneid.)

Abstract

Pseudocydonia sinensis (Thouin) C.K. Schneid. less known plant species in the Ukraine conditions, but the fruits were widely used in traditional Chinese medicine for the treatment of asthma, colds, sore throat, mastitis, rheumatoid arthritis, and tuberculosis. In this study, chemical compositions of the leaves of Pseudocydonia sinensis were investigated. They contained total protein 6.66%, ash 8.54%, lipids 3.38%, beta carotene 90.30 mg/kg DW. Monosaccharide analysis revealed that the neutral carbohydrate part (fructose, maltose, sucrose, and lactose) was found in low amounts only (<0.5 g/kg). The major quantitative tocopherol in leaves was α-tocopherol (80.73 mg/kg DW). Saturated, monounsaturated and polyunsaturated fatty acids, palmitic acid (C16:0; 53.36 g/100 g DW), oleic acid (C18:1; 12.49 g/100 g DW) and linoleic acid (C18:2; 8.24 g/100 g DW), respectively, were found predominant. Palmitic acid makes up 57.2% of the total amount. The total amount of amino acids found in the leaves was 53.90 g/kg DW, including total essential amino acids (28.60 g/kg DW) and percentage of total essential amino acids (53.06%). Glutamic acid was found of leaves to be the dominant free amino acid (6.5 g/kg DW) followed by aspartic acid (5.4 g/kg DW) and leucine (4.9 g/kg DW DW). The mineral composition of leaves of P. sinensis demonstrated the presence of elements in following order: Ca>K>Mg>P>S>Fe>Zn>Na>Mn>Al>Cu>Ni>Cr>Pb>Cd>Hg>As>Se. Studied antioxidant parameters showed that antioxidant activity by DPPH and molybdenum reducing power was 8.76 and 289.73 mg TE/g, respectively. Also, the total content of polyphenols, flavonoids, and phenolic acids amounted to 65.77 mg GAE/g, 22.47 mg QE/g, and 9.06 mg CAE/g, respectively. The obtained data represent that leaves of P. sisnensis contain rich mineral composition, amino, and fatty acid composition and biologically active compounds such as polyphenols that can be used in the pharmaceutical study to validate its possible medicinal application. The study of less know and neglected plant species and it's raw can increase possible use in human life beneficial plant products.

Methodological Approach to the Elaboration of the Analytical Procedure of the Antioxidant Activity Determination of the Schisandra chinensis (Turcz) Baill. Extracts

“…Herbal preparations are used as an alternative source of medicines to mitigate the diseases associated with oxidative stress (Priya and Nethaji, 2015). The free-radical scavenging activity of the extracts was evaluated using the widely used 2,2-diphenyl-1picrylhydrazyl (DPPH) test (Sheng et al, 2011;Mocan et al, 2014;Ivanišová et al, 2017;Vergun et al, 2018Grygorieva et al, 2020;Shelepova et al, 2020;Tvrdá et al, 2020;Mňahončaková et al, Vinogradova et al, 2021). The DPPH assay provides an easy and fast mode to estimate antioxidant activity.…”

“…According to the literature, DPPH has an absorption maximum at a wavelength of 514-517 nm (Ivanišová et al, 2017;Shelepova al., 2019;Vergun et al, 2019Grygorieva et al, 2020;Hu et al, 2020;Tvrdá et al, 2020). Reducing a colour intensity of a reaction mixture is carried out by various authors at the time range of 4-15 minutes to 1 hour (Sheng et al, 2011;Mocan et al, 2014;Hu et al, 2020).…”

A chromosome-level genome assembly of Chinese quince (Pseudocydonia sinensis)

“…Extracts from the fruit are also widely used in the production of candies, beverages and desserts. Medically, the dried P. sinensis fruit is known for its hangover relief and expectorant properties (Grygorieva et al, 2020).…”

Nutritional Value, Bioactive Components and Antioxidant Activity of Schisandra chinensis (Turcz.) Baill. Leaves

“…Ample studies have shown that non-traditional, little-known, and underutilized edible leaves of plant species, also offer some nutritional value; being a good source of macroelements, minerals, polyphenols, with impressive antioxidant activity, thus gained interest as potential functional foods (Monka et al, 2014;Ivanišová et al, 2017a;Horčinová Sedláčková et al, 2018Klymenko et al, 2017Klymenko et al, , 2019Vinogradova et al, 2020;Grygorieva et al, 2017Grygorieva et al, , 2018aGrygorieva et al, , 2018bGrygorieva et al, , 2018cGrygorieva et al, , 2020aGrygorieva et al, , 2020b. However, to the best of authors' knowledge, the data about nutrient composition and therapeutic properties of different morphological parts of plants is highly limited.…”