Bioactive polysaccharides and their soluble fraction from Tossa jute (Corchorus olitorius L.) leaves

• Published in: Food bioscience 2020-10, Vol.37, p.100741, Article 100741
• Main Authors: Ben Yakoub, Amira Racha, Abdehedi, Ola, Jridi, Mourad, Elfalleh, Walid, Bkhairia, Intidhar, Nasri, Moncef, Ferchichi, Ali
• Format: Article
• Language: English
• Subjects: Antioxidant activities; Corchorus olitorius L; Polysaccharides; Tossa jute
• ISSN: 2212-4292; 2212-4306
• DOI: 10.1016/j.fbio.2020.100741

The biological proprieties of mucilaginous polysaccharides (PSc) and their soluble fraction (SF) extracted from Tossa jute leaves (Corchorus olitorius L.) using an ethanol precipitation method were studied. The results showed that PSc had higher total polyphenols and flavonoids and greater antioxidant activities than SF. At 1.5 mg/ml PSc, the antioxidant activities were about 90% against 1,1-diphenyl-2-picryl hydrazyl radical (DPPH•), 78% against lipid peroxidation and 69% against β-carotene. The PSc with a FRAP assay at the same concentration showed an effective protection against hydroxyl radicals and DNA breakage. Furthermore, the extracted PSc had a wide spectrum of antibacterial activities against all bacteria tested (Gram+ and Gram-) while SF was effective against Klebsiella pneumoniae and Salmonella enterica at 25 mg/ml. The overall data suggested that this natural PSc may be used as a competitive antioxidant and antimicrobial additive in food and in medicinal preparations. [Display omitted] •Polysaccharides (PSc) were extracted from Tossa jute (Corchorus olitorius L.) leaves.•PSc had high total sugar content.•PSc showed higher antioxidant activities than the soluble fraction (SF).•Tossa jute PSc and their SF showed high antibacterial activities.