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Evaluation of Various Drying Methods on Bioactives, Ascorbic Acid and Antioxidant Potentials of Talinum triangulare L., foliage

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Abstract

The aim of this study was to assess the efficiency of different drying methods (room, sun, oven, microwave, cross-flow, infra-red, dehumidifier, and freeze-drying) on maximum retention of the nutritional and bioactive compounds profiling of Talinum triangulare, which is a less-known perishable leafy-vegetable. The evaluation of various drying methods is to learn the best appropriate strategy for a post-harvest drying method for retaining all the potential benefits with minor loss. Microwave and freeze-dried samples held the maximum ascorbic acid quantified by HPLC with 1.36 and 1.11 g/100 g DW, respectively. The main carotenoid compounds identified were violaxanthin, lutein, zeaxanthin, β-carotene isomers, trans-β-carotene, and cis-β-carotenes. Gallic, protocatechuic, catechin, para-coumaric, ferulic, rutin, trans-cinnamic, and quercetin are the significant phenolics and flavonoids identified and quantified by liquid chromatography. The efficiency of different solvents on bioactive extractions uncovered that the methanol and 80% aqueous ethanol were good for retention of total phenolics, total flavonoids, and antioxidant compounds, which was affirmed through phosphomolybdate, DPPH, and FRAP assays. Dried T. triangulare foliage could be productively utilized as a promising raw material for food and pharma businesses because of its rich bioactive composition.

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Acknowledgements

The author (SSK) is grateful to CSIR New Delhi for the award of SRF fellowship and Department of Biotechnology (BT/PR16902/NER/95/422/2015), Government of India, New Delhi, for financial assistance. We greatly acknowledge the Director, CSIR-CFTRI, for his kind support.

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Author notes

  1. Paramesha Mahadevappa

    Present address: Department of Studies and Research in Food Technology, Davangere University, Davangere, Karnataka, 577007, India

Authors and Affiliations

  1. Plant Cell Biotechnology Department, CSIR – Central Food Technological Research Institute, Mysore, 570 020, India

    Sandopu Sravan Kumar, Monisha Arya, Priyanka Nagbhushan, Parvatam Giridhar, Nandini P. Shetty & Paramesha Mahadevappa

  2. Traditional Food and Sensory Science, CSIR – Central Food Technological Research Institute, Mysore, 570 020, India

    Sudheer Kumar Yannam

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Correspondence to Paramesha Mahadevappa.

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Kumar, S.S., Arya, M., Nagbhushan, P. et al. Evaluation of Various Drying Methods on Bioactives, Ascorbic Acid and Antioxidant Potentials of Talinum triangulare L., foliage. Plant Foods Hum Nutr 75, 283–291 (2020). https://doi.org/10.1007/s11130-020-00804-4

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  • DOI: https://doi.org/10.1007/s11130-020-00804-4

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