Phytochemical screening and potential of natural dye colourant from pomegranate (Punica granatum L.)

Abstract

Purpose – The purpose of this paper is to identify the most dominant pigment of pomegranate explants for natural color coatings and detect the presence of phytochemical constituents and comparison of the antioxidant activities. Design/methodology/approach – Extracts of leaf, stem, peel and seed of in vitro and in vivo growth cultures were prepared for phytochemical constituent and antioxidant activity. The supernatant from 95 per cent methanol was mixed with 15 per cent polyvinyl alcohol (PVA) with the ratio of 1:1 to form a coating system. Findings – Although glycosides was not found in this species, tests for tannins and flavonoids were positive in all samples. The IC50 values were also comparable to commercial antioxidant ascorbic acid with 34.92 per cent inhibition. Chlorophyll a and b were detected in stem and leaf using UV-photospectrometer in 420 and 645 nm wavelengths ranges. The effects of heat and salt on the stability of natural dye colorants mixed with polyvinyl alcohol to form a basic coating system were indicated negatively in in vivo and in vitro growth cultures. Originality/value – The paper shows that further improvement with co-pigmentations may give a notable mixture from pomegranate extraction for the paint materials or nail varnish. It was also indicated that pomegranate contains some compounds such as polyphenolics that can donate electron/hydrogen easily.

Phenolic profiling and antioxidant capacity in flowers, leaves and peels of Tunisian cultivars of Punica granatum L.

“…In another work, Mphahlele et al (2016) showed that pomegranate peels had the highest inhibitory activity (with the minimum inhibitory concentration values) against Gram positive bacteria, such as Staphylococcus aureus and Bacillus subtilis. Furthermore, Mohajer et al (2016) have proved that chlorophyll-a extracted from the leaf and stem of pomegranate, can be a potential source of natural colorants for the coating industry and/or as nail varnish.…”

Unlocking the therapeutic treasure of pomegranate leaf: A comprehensive review on phytochemical compounds, health benefits, and future prospects

“…In agriculture, PGL aids in preserving animal health by inhibiting feed degradation and combating parasites ( Fathuddin & Inabo, 2017 ; Hassan et al, 2017 ). Manufacturing applications include using PGL as a natural colorant in paints and in petroleum distillate purification and corrosion inhibition ( Abboud et al, 2016 ; Mohajer, Taha, & Azmi, 2016 ; Sadare & Daramola, 2019 ). This comprehensive utilization of PGL highlights its growing versatility and potential across various sectors, suggesting a promising future for PGL-based products and applications (Fig.…”

Plant-Derived Colorants for Food, Cosmetic and Textile Industries: A Review

“…Pangestu et al demonstrated that non-acylated anthocyanins such those obtained from Sambucus peruviana and copigmented with ferulic acid could be potentially applied in commercial food products [16]. An improvement of the copigmentation effect was also achieved with pomegranate extract [17]. Anthocyanins as colorants are often used at a low pH, below 4, but some anthocyanin 3-glucosides, such as malvidin 3-glucoside, are relatively stable at a higher pH and can be used for alkaline products [4].…”