Laminariacea and Gracilariaceae are very important economic seaweeds, whichcan be widely used in food, medicine, chemical industry, aquaculture feed algae, frammanure fields cause of its rich polysaccharide. Trehalose and cellulose aredisaccharide and polysaccharide based on glucose molecules, act as two importantbranches of glucose metabolic pathway in all organism. Trehalose is a kind ofimportant resistant protective material in vivo. Cellucose is an important compositionelement cell wall in vascular plan...