Polysaccharides, Total Phenolic, and Flavonoid Content from Different Kenaf (Hibiscus cannabinus L.) Genotypes and Their Antioxidants and Antibacterial Properties

Plants

Defang Li¹  Siqi Huang¹  Huijuan Tang¹  Ziggiju Mesenbet Birhanie¹  Dawei Yang¹  Liangliang Liu¹  Cuiping Zhang¹  Susmita Dey¹  Yong Deng¹  Lining Zhao¹  Li Chang¹  Chao Zhang¹  Jianjun Li¹  Anguo Chen¹  Ashok Biswas¹  Aiping Xiao¹  Gen Pan¹ 

[1] Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410000, China;

关键词: Hibiscus cannabinus;    antioxidant activity;    antibacterial activity;    polysaccharide;    phenolic content;    flavonoid content;   

DOI  :  10.3390/plants10091900

来源: DOAJ

【 摘 要 】

Kenaf (Hibiscus cannabinus L.) is a valuable plant with a potential health benefit because of its extensive bioactive compounds. Leaf extracts of 33 kenaf genotypes were investigated for their polysaccharide, total phenolic, and flavonoid content. The antioxidant properties were evaluated by 2,2-Diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS), and ferric reducing antioxidant potential (FRAP) assays. Antimicrobial capacity was also assessed against Staphylococcus aureus and Escherichia coli using a disc diffusion assay. The polysaccharide content varied from 6.45–16.12 mg glucose per g DW. Total phenolic and flavonoid content ranged from 6.03–21.15 mg GAE/g DW and 1.55–9.24 mg RE/g DW, respectively. Similarly, varied values in the range 20.55–79.99% of inhibition by DPPH, 56.28–88.30% of inhibition by ABTS and 1.26–5.08 mmol Fe²⁺/g DW by FRAP assays were obtained for antioxidants of the genotype extracts. Extracts from CS4 and CS2 genotypes had the highest antioxidant activities. Kenaf leaves exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli. Strong correlation was found between antioxidant activity with polysaccharide (DPPH, r = 0.893; ABTS, r = 0.819; FRAP, r = 0.864) and total phenolic content (DPPH, r = 0.850; ABTS, r = 0.959; FRAP, r = 0.953). The results suggested that the kenaf leaves could be used as a natural antioxidants and antimicrobial in food industries.

【 授权许可】

Unknown