Structural characterization and antifungal properties of sequentially extracted polysaccharides from Algerian Opuntia ficus-indica L. cladodes
Nassima Draou, Hassiba Bokhari, Samia Gharbi, Abderrahmane Rouane, Hachem Kadda, Hakima Kebaili, Yogesh Kumar, Nishant Kumar, Nishant Kumar, Nishant Kumar, Nishant Kumar
TL;DR
This study explores the structure and antifungal properties of polysaccharides from an Algerian cactus, finding potential uses in pharmaceuticals and food preservation.
Contribution
This is the first study to use sequential extraction on Algerian Opuntia ficus-indica L. to isolate and characterize its polysaccharides.
Findings
Pectins rich in homogalacturonans and rhamnogalacturonans were identified with specific monosaccharide compositions.
Antifungal assays showed a 75% growth reduction in Penicillium sp. at 100 mg/mL pectin concentration.
The presence of carboxylate groups in pectins correlates with observed antifungal bioactivity.
Abstract
Opuntia ficus-indica L., a xerophytic cactus native to arid regions, is an understudied source of structurally varied polysaccharides with potential for bioactivity. Four different types of substances were separated in this study, which is the first time this method has been used for Algerian varieties: cellulose (19.1%), pectins (7.20%), hemicelluloses (2.57%), and water-soluble mucilage (8.84% of dry mass). Pectins rich in homogalacturonans (33.5% galacturonic acid) and rhamnogalacturonans (30% rhamnose) were identified by monosaccharide profiling, along with hemicelluloses that were dominated by xylose (55.9%). FTIR spectroscopy validated structural signatures, such as β-glycosidic linkages (890 cm ⁻ ¹) and carboxylate groups (1750 cm ⁻ ¹) in pectins. Penicillium sp. was shown to be dose-dependently inhibited by antifungal assays, with a 75% growth reduction at 100 mg/mL pectin…
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Taxonomy
TopicsBotanical Research and Applications · Polysaccharides and Plant Cell Walls · Seaweed-derived Bioactive Compounds