Standardization of Bio-pigment Extraction Techniques from Yellow Flowering Landscape Ornamentals

Author: Dipayan Sarkar, Arpita Mandal Khan, Soumen Maitra and Prodyut Kumar Paul

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Abstract

Bio-pigments obtained from landscape ornamentals plant sources has the potential to be an eco-friendly, non-toxic and cost effective substitute in food and textile industries and can subsequently create entrepreneurship opportunities in rural and urban areas and can reduce the use of synthetic colours and their hazards. Flowering trees and shrubs which are used in landscaping, blooms profusely at certain seasons; however, except for aesthetic gratification the flowers are not utilized in any commercial purpose and referred to as waste material. The present study hypothecates that bio-pigments extracted from the waste flowers can add commercial value to the plants and can convert the flower waste to wealth. Three common yellow flowering landscape plants namely, Cassis fistula, Peltophorum pterocarpum and Cassia alata were selected for extraction of pigment through six different methods and colour, their stability under varying temperature and pH were evaluated. The results of this experiment showed that the eighteen resultant pigments varied significantly with respect to their colour values (ΔE* L*a*b*), anthocyanin and carotenoid contents and colour stability at acidic, alkaline or high temperature condition. The maximum anthocyanin and carotenoid content was observed in Cassia alata with soaking and maceration in acidic solution(58.94mg/l) and Peltophorum pterocarpum with soaking and maceration in acidic solution (33.76 μg/g) respectively.

Keywords

Anthocyanin, carotenoid, ΔE* L*a*b*, pigment

Conclusion

The colour of a pigment is dictated by the co-pigmentation of anthocyanins and flavonols which vary with species, methods of extraction, pH and temperature. These landscape ornamental species can be effectively exploited for extracting pigments of different colours and shades by manipulating the methods of extraction. The flowers especially, Cassia alata and Peltophorum pterocarpum was noted to be rich source of anthocyanin and carotenoids. The pigments also showed good stability under wide range of pH and temperature, hence further study on their applicability on food, textile and cosmetics can lead to commercialization of these pigments.

References

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How to cite this article

Dipayan Sarkar, Arpita Mandal Khan, Soumen Maitra and Prodyut Kumar Paul (2023). Standardization of Bio-pigment Extraction Techniques from Yellow Flowering Landscape Ornamentals. Biological Forum – An International Journal, 15(5): 455-461.