Flavonoids from the Zizania latifolia Bracts: Extraction Optimization, Antioxidant Activity and Exploration in Strawberry Preservation
- 1 Changshu Institute of Technology, China
- 2 University of Shanghai for Science and Technology, Chile
Abstract
Zizania latifolia bracts are Z. latifolia-based agricultural waste materials, distributed in various parts of the world. In the current study, the Response Surface Method (RSM) was used to optimize the cellulase-assisted extraction of Total Flavonoids from Z. latifolia bracts (TFZB). Then, the in vitro antioxidant capacity and the potential effect on strawberry preservation were assessed. The results showed that the optimal conditions for extracting TFZB was: Solid-to-liquid ratio of 1: 40 g/mL; ethanol concentration of 60% (v/v); cellulase dosage of 0.4% (w/w); incubation time of 2 h. Under these conditions, the yield of TFZB reached 0.49±0.01%. TFZB exerted certain antioxidant capacity. The free radical-scavenging rates against hydroxyl and DPPH radicals were 86±1.32% and 90±1.6% respectively at the concentration of 1.6 mg/mL and TFZB also exerted reducing power on Fe3+. Finally, the potential of TFZB on strawberry preservation was investigated from three aspects: Weightlessness rate, rotting rate and Vc content. It was found that the above-mentioned profiles were all improved after the strawberries sprayed with TFZB solution during the storage period. This study suggested that the TFZB may be developed as a novel antioxidant and fruits preservative, providing an evidence for the further utilization of Z. latifolia bracts.
DOI: https://doi.org/10.3844/ajbbsp.2021.97.108
Copyright: © 2021 Tong Wang, Yuzhu Zhang, Lijie Ben, Chenxin Zhai, Ying Lv, Yang Zhang and Lixue Zheng. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
- 2,885 Views
- 1,127 Downloads
- 0 Citations
Download
Keywords
- Zizania latifolia Bracts
- Total Flavonoids
- Cellulase-Assisted Extraction
- Antioxidant Activity
- Strawberry Preservation