Molecular Mechanisms of Plant-Derived Polysaccharides in Regulating Ice Crystal Formation During Dough Freezing

Abstract

Frozen dough systems occupy a critical position in contemporary bakery supply chains because they enable centralized production, long-distance distribution, and consumer-side baking. However, freezing and frozen storage impose severe physicochemical stresses on dough, most notably through ice nucleation, ice crystal growth, recrystallization, and the redistribution of water among gluten, starch, and soluble biopolymer phases. Plant-derived polysaccharides have emerged as promising cryoprotective agents because they can alter water dynamics, modify ice crystal habit, stabilize colloidal networks, and modulate the mechanical response of the frozen matrix. This paper examines the molecular mechanisms by which plant-derived polysaccharides regulate ice crystal formation during dough freezing, with attention to hydration, hydrogen bonding, steric hindrance, viscosity enhancement, gelation, phase separation, and ice recrystallization inhibition. It further situates these mechanisms within a system-level framework that considers structural trade-offs, processing architecture, cold-chain infrastructure, industrial deployment, sustainability, robustness, and policy implications. The analysis suggests that polysaccharide cryoprotection is not a single molecular event but a distributed property emerging from interactions among polymer chemistry, water state, dough microstructure, freezing kinetics, and storage conditions. A recent study of a Phyllanthus emblica L. polysaccharide fraction illustrates how sol-gel transition behavior can be coupled to cryoprotective function in frozen dough applications. The paper concludes that effective deployment requires integrated design across molecular, colloidal, engineering, and governance scales, because isolated molecular optimization without cold-chain reliability, energy justice, and regulatory coherence is unlikely to deliver durable benefits.