Abstract
Reducing salt in reconstructed duck ham while maintaining its texture is still challenging. This study developed a novel salt-reducing strategy using lyophilized emulsion complexes of myofibrillar protein (MP) and gum Arabic (GA) (4:0, 3:1, 2:2, 1:3 and 0:4) with TGase as control. Spectroscopic analysis revealed that MP-GA complexation enhanced the protein unfolding, particularly the balanced protein/polysaccharide ratio at 3:1 (M(3)G(1)). M(3)G(1) incorporation favored the MP association and meat integration macroscopically, increasing water holding capacity by 8.02 % and gel strength by 143.3 % versus control. Sensory and electronic tongue analysis confirmed M(3)G(1) maximized saltiness perception score (8.2) than other treated groups (7.4-7.8) and the control (5.4) through heterogeneous sodium distribution. Sodium release kinetics and porcine tongue perception further reflected that M(3)G(1) rendered prolong Na(+) releasing out for saltiness enhancement. Therefore, MP-GA complexes with manipulated ratio (especially M(3)G(1)) can simultaneously enhance texture and saltiness perception, offering a promising alternative for low-sodium duck ham.