Structural analysis of kappa-carrageenan isolated from Hypnea musciformis (red algae) and evaluation as an elicitor of plant defense mechanism

► Exploitation of seaweed (H. musciformis) polysaccharides to evaluate as an elicitor or inducer of plant defense responses. ► Purified fraction was characterized by acid hydrolysis and Paper Chromatography showed. ► Purified fraction having molecular weight ≥70,000 Da. ► Purified fraction-A produced intense browning as compare to the purified fraction (PF-B) of H. musciformis. ► FTIR, 1H and 13C NMR techniques were used for structural characterization of these polysaccharides.