Effect of dehydration methods on pigment characteristics, bioactives profile and antioxidant potential of blue petals of Clitoria ternatea L.

Vandana, Padmanabhan and Giridhar, Parvatam (2024) Effect of dehydration methods on pigment characteristics, bioactives profile and antioxidant potential of blue petals of Clitoria ternatea L. Journal of Food Measurement and Characterization, 18. pp. 3536-3546.

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Abstract

Dehydration or drying is one of the most commonly used post-harvest procedures for effectively using edible flowers in food industries. Clitoria ternatea L. (CT), belonging to the family Fabaceae, is a medicinal plant, and one of its varieties bears blue-coloured flowers and, hence, is used as a natural colourant in foods. In the present study, CT petals were subjected to different dehydration procedures – room/shade drying (RD), sun-drying (SD), hot air drying (HAD), microwave drying (MD) and freeze-drying (FD). Later their pigment characterization, bioactive profiling and determination of anti-oxidant potential were carried out. There was a substantial reduction in moisture content after drying; the moisture content ranged between 4.5 and 12.5% in different drying methods. The blue pigment delphinidin-3-glucoside (D3G) and delphinidin chloride (DC) content were recorded maximum in MD petals (95.49 ± 7.80 mg/100 g and 432.02 ± mg/100 g, respectively). Rutin and sinapic acid were the major bioactives detected via UHPLC, with maximum content retained in the HAD petals (188.0 ± 1.24 mg/ 100 g and 2.307 ± 0.82 mg/100 g), respectively. The ethanolic extracts of MD, HAD and FD petals showed better antioxidant activities than the RD and SD petals. All drying techniques significantly reduced the amount of moisture in the petals. HAD, MD, and FD outperformed SD and RD in the five drying techniques studied. Concerning total pigment content, MD extracts exhibited the highest TAC values; however, the extracts of HAD and FD petals showed better results for antioxidant potential. Additionally, ethanolic extracts outperformed other solvents in a majority of samples. These results corroborate potential applications of CT-dried blue petals as natural colourants in food industries

Item Type:	Article
Uncontrolled Keywords:	Clitoria ternatea flowers, Dehydration, Post-harvest, Delphinidin anthocyanins, Bioactives, Antioxidant activity
Subjects:	500 Natural Sciences and Mathematics > 10 Plants 600 Technology > 05 Chemical engineering > 02 Drying, Dehydration 600 Technology > 08 Food technology > 32 Antioxidants
Divisions:	Plant Cell Biotechnology
Depositing User:	Somashekar K S
Date Deposited:	20 Jan 2025 06:50
Last Modified:	20 Jan 2025 06:50
URI:	http://ir.cftri.res.in/id/eprint/18940

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